### ETC 138P40.4848.FAR

```UNIVERSAL JOINTS
Fax: +44 (0)1992 509890
2
5
®
UNIVERSAL JOINTS
basic principles
2
Constant velocity output can be restored by using a double
joint or by connecting two single joints back to back. Two rules
must be observed:
Universal joints (U/J's) transmit rotation from one shaft placed
end to end with another. They will operate at a much larger
angle than is permissible with a misalignment coupler and are
commonly used in pairs to take a drive train through laterally
displaced axes. The ability to change angle while operating
applications, a telescopic drive shaft is used to accommodate
accompanying changes in length.
1. The operating angle must be the same at the input end as at
the output end (Figs. 1 & 2).
2. When connecting two single joints, they must be orientated
so that the inboard lugs are in line (Fig. 3).
Under these conditions the fluctuations in the first joint will for
all practical purposes be cancelled out by the complementary
fluctuations in the second.
General purpose
telescopic
drive shaft
Fig 1
Although constructional details can differ widely between one
maker's product and the next, U/J's fall into two groups
identified as constant velocity or non-constant velocity joints.
Constant velocity types are most often seen on front wheel
drive vehicles. They are relatively costly to produce and are
generally purpose designed for the application. The joints
featured in this catalogue work on the Hookes or Cardan
principle and are of the non-constant velocity type.
These
angles must
be equal
Fig 2
These
angles must
be equal
Principle of
Hookes joint
Fig 3
Inboard
lugs
in line
What this means is that for a given operating angle the output
velocity fluctuates even though the input velocity is constant.
These fluctuations result in the output gaining, then lagging with
respect to the input, twice in each revolution to an extent
governed by the operating angle. The fluctuation is predictable
and varies between
ω cos α
and ω sec α
where ω = angular velocity (speed rev/min)
and α = operating angle
Thus at an operating angle of 5°, the fluctuation is ±0.4%, at 7°
±0.8% and at 10° ±1.5%. For example, a motor shaft turning at
a constant 1000 rpm, driving through a single universal joint set
at an operating angle of 5°, will produce an output that
fluctuates between 996 and 1004 rpm twice every revolution.
At low speed or on manual operation, the fluctuations will be of
interest only in calibrated applications; at higher speeds, they
will increasingly give rise to torsional vibration.
6
®
Tel: +44 (0)1992 509888
UNIVERSAL JOINTS
application
selection
Universal joints are typically used to transmit positive rotation
through intentional offsets where the power source is some way
from the load. It is important to note that a U/J is essentially a
pivot and that it cannot accommodate any parallel displacement
between shafts if used singly. Moreover, the installation must
allow for some adjustment when mounting the joint so that the
shaft centre lines can be made to converge at the fulcrum of the
joint. This is essential if the joint is to function correctly and not
U/J’s are selected for size on the basis of the torque to be
transmitted, the speed of rotation and the operating angle.
These variables give rise to a performance chart on which the
values can be read off and a suitable joint selected. Factors
relating to the nature of the power source or load are
sometimes applied. A single cylinder internal combustion
engine for example is more punishing to the transmission than
an electric motor. An even load is less onerous than an
intermittent one.
Correctly installed, the shaft
centre lines converge at the
fulcrum of the joint.
In principle, a U/J works harder as the operating angle
increases. The larger the operating angle, the lower the torque
or the speed at which it can be transmitted, or both.
2
In selecting the best type of universal joint for a given
application, the intended duty and life requirement are the
determining factors. High speeds and/or operating angles are
best handled by U/J’s fitted with roller bearings. These are
lubricated for life but it is nevertheless a good plan to protect
the moving surfaces with a gaiter which prevents the ingress of dust,
moisture and other foreign matter. Roller bearing joints are generally
specified where sustained rotational speeds exceed 1200/1500 rpm.
Most applications however, demand a pair of U/J’s. This yields
several advantages including constant velocity output, a less
critical installation procedure, a shared operating angle (each joint
works at 50% of the total), and the ability to drive through laterally
displaced shafts. A pair of joints can comprise a drive shaft with a
U/J at each end or a double U/J for close coupled applications. A
double U/J offers greater misalignment compensation than a
misalignment coupler and runs at higher efficiency. For a given
torque rating however, it is usually significantly longer.
Joint with protective
gaiter fitted
The most commonly specified joints are those fitted with plain
bearings. These are better at withstanding shock loads and are
adequate for speeds up to 1200/1500 rpm. Journals and
bearings are usually heat treated then ground and honed
respectively. On larger U/J’s , the bearing may be manufactured
separately and pressed into the parent metal before assembly.
To ensure an adequate service life, U/J’s should be regularly
lubricated. Where this is difficult due to inaccessibility, gaiters
will retain the lubricant and afford protection in aggressive
environments. For low speed or manual operation only, an
‘economy series’ joint may be adequate. These are
manufactured to looser tolerances and dispense with the
hardening, grinding and honing of bearings.
50%
50%
100%
Each joint operates at
50% of total offset
Lastly, U/J’s manufactured in plastics combined with nonferrous metals offer economy plus a set of properties not found
in steel joints. Foremost among these are their light weight,
resistance to corrosion electrical non-conductivity and freedom
from both lubrication and backlash. A supreme advantage of
the moulding technique is the cost-saving opportunities it
offers. Examples are the ease of producing non-circular bores
and the ability to integrate related components in the moulding
process, typically gear forms and toothed belt pulleys.
Lateral displacement
Telescopic drive shafts with a single U/J fitted at each end are
used to power mechanisms that move in relation to the power
source. The most common example is the drive shaft
connecting the gearbox to the rear axle on a road vehicle.
Another is the power take-off fitted at the rear of a tractor to
power-up ancillaries towed behind it. There are many more
applications in machine tools, packaging machinery and the
like. As the driven mechanism moves, the distance between the
U/J centres changes and since U/J’s cannot accommodate end
movement, a telescoping facility is built into the drive shafts.
Typically, this takes the form of a splined shaft with matching
broached tube. For lightly loaded or less critical applications,
nesting tubes cut from square material are adequate for the
purpose. It should be noted that although a pair of U/J’s
connected by a drive shaft and correctly set up will produce a
constant velocity output, the connecting shaft turns in
sympathy with the output of the first joint and is therefore
subject to the fluctuations governed by the working angle of the
first joint.
Compared with similarly sized steel joints, plastics U/J’s have a
significantly lower torque carrying capability.
Huco-Pol U/J's and telescopic
drives are manufactured in acetal
and non-ferrous metals for costeffective use in light duty
applications. Bored Ø3mm to
16mm, the joints feature
backlash-free articulation.
Catalogue available on request.
Fax: +44 (0)1992 509890
7
®
STEEL UNIVERSAL JOINTS
2
features
type TR, needle roller bearings – 6000 rpm max
Huco universal joints feature a comprehensive range of sizes
manufactured in good quality steels. Plain bearing and needle
roller types are available and either can be supplied with
square, hexagonal or keywayed bores to order. The joints are
also manufactured with quick release collars and in telescopic
form to order.
This series is intended for applications demanding high
rotational speeds (up to 6000 rpm) and large working angles
where operation is without benefit of periodic lubrication.
types TL & TS, plain bearings – 1200 rpm max
These joints feature hardened journals of generous proportions.
In joint sizes 13 – 60 (external diameter in mm) they are retained
in the forks and pivot in holes provided in the central core. A
large bearing surface is thus achieved which helps to reduce
wear and tear and prolongs the operational life of the joint.
They are constructed with hardened and ground journals
pivoting between caged needle roller bearings housed in the
fork ends. Four bronze thrust rings interface between the
central core and the inner surfaces of the forks. These help to
achieve greater load capacities by minimising friction generated
Although the joints are pre-lubricated, rubber gaiters are
recommended as a protective measure in abrasive or damp
environments and to prevent ingress of foreign matter. Note that
good heat dissipation becomes important under conditions of
high working angles and high rotational speeds.
By virtue of the increased wall thickness available in the larger
joints, pins fitted to sizes 70 – 100 are retained in the central
core and pivot in treated bushes housed in the fork ends.
Type TR joints are suitable for all high speed applications or
where periodic lubrication is difficult, typically machine tools,
textile machines, multi-spindle drilling and tapping machines,
packaging machines, special purpose machines and
mechanical applications generally.
styles & sizes
U/J’s are produced in 17 sizes, identified by their outside diameter
in mm. All sizes are available in single and double form.
Style
Outline
Sizes
Extended
unbored
series with
plain bearings
13 to 60 with 10 intermediate
sizes
Standard
bored series
with plain
bearings
13 to 100 with 15 intermediate
sizes
Standard
bored series
with needle
roller bearings
20 to 50 with 3 intermediate
sizes
Any of these can be manufactured as a telescopic drive shaft.
The range of practical bore diameters corresponding with universal
joints is 5.00 – 60.00 mm.
8
®
Tel: +44 (0)1992 509888
STEEL UNIVERSAL JOINTS
type HS, plain bearings – 1500 rpm max
also available
The range also includes:
2
Joints with quick-release collars
Joints with needle roller bearings
Ball joints
Any of these executions can be supplied as telescopic drive
This series conforms to DIN 808 (alternative to DIN 7551) and
features conventional construction comprising 1 long and 2
short journals with mutual location within the hardened centre
block. Large bearings of equal diameter are machined into the
fork ends which are subsequently induction hardened and
honed to render a precision fit. A grinding operation on the
inner faces of the forks corrects any distortion to ensure
concentricity of bores.
Telescopic drive shaft
with conventional joints.
The joints are suitable for all mechanical engineering
applications where the maximum speed of rotation does not
exceed 1500 rpm.
type HE
An economy series, similar to type HS but manufactured to a
lesser specification which omits the grinding, honing and heat
treatment operations. In consequence type HE is suitable only
for low speed transmissions and is intended for manual
operation or intermittent motorised applications.
Telescopic drive shaft
with ball joints.
Single ball joint.
lubrication
Regular lubrication at intervals consistent with the duty cycle is
recommended in the interests of extending the life of the joint.
The joints should be adequately lubricated and the use of
rubber gaiters loaded with grease is recommended. They
protect against dust, damp and foreign matter and by ensuring
permanent lubrication of the sliding surfaces, maintain optimum
efficiency over a longer service life.
Single joint fitted with needle
roller bearings.
The journals are machined
integral with the central block.
The gaiters are moulded in a special mix of synthetic rubber
which permits their use in temperatures from –20°C to 100°C.
They are resistant to oils, greases, many chemical agents, sea
water and tropical climates.
The joints are suitable for use in machine tools, textile
machines, agricultural equipment, multi-spindle drilling and
tapping machines and mechanical engineering applications
generally where the maximum speed of rotation does not
exceed 1200 rpm.
Fax: +44 (0)1992 509890
9
®
STEEL UNIVERSAL JOINTS (T SERIES)
extended unbored joints with plain bearings
2
A series of good commercial quality joints manufactured to longer
dimensions. They are stocked with solid ends for boring by the user.
Maximum working angle is 40° for single and 80° for double joint sizes
13 – 45. This reduces to 30° and 60° respectively for size 50 and
upwards.
Maximum speed 1200 rpm, see performance charts on page 15.
These plain bearing universal joints must be lubricated.
The use of gaiters is recommended.
type TL single joint
type TL double joint
type T gaiter
L20
L1
L4
D20
D1
D1
L2
L2
Order Code
Bores
D1
L1
Static
Torque
at
Break
L2 (Nm)
135.13.0000
135.17.0000
135.20.0000
135.23.0000
135.26.0000
135.29.0000
135.32.0000
135.40.0000
135.45.0000
135.50.0000
135.55.0000
135.60.0000
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
13
17
20
23
26
29
32
40
45
50
55
60
50
58
64
76
86
90
95
108
127
140
165
178
19
21
22
27
31
30
31
34
44
49
57
59
65
120
150
210
290
480
850
1350
1750
2500
4000
5000
D21
L5
Order Code
Bores
D1
L2
137.13.0000
137.17.0000
137.20.0000
137.23.0000
137.26.0000
137.29.0000
137.32.0000
137.40.0000
137.45.0000
137.50.0000
137.55.0000
137.60.0000
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
13
17
20
23
26
29
32
40
45
50
55
60
19
21
22
27
31
30
31
34
44
49
57
59
L4
Static
Torque
at
Break
L5 (Nm)
Order
Code
D20 D21 L20
73
85
94
110
122
131
142
164
195
212
244
266
23
27
30
34
36
41
47
56
68
72
79
88
–
143.17
143.20
143.20
143.26
143.29
143.32
143.40
143.45
143.50
143.50
143.60
–
32
39
39
47
51
56
75
83
93
93
100
65
120
150
210
290
480
850
1350
1750
2500
4000
5000
–
–
16.5 40
20.5 47
20.5 47
24.5 52
27.5 58
30.5 67
40.0 84
45.0 97
50.0 110
50.0 110
56.0 122
type TS single joint - stainless steel
Order Code
Bores
D1
L1
L2
158.13.0000
158.17.0000
158.20.0000
158.23.0000
158.26.0000
158.29.0000
158.32.0000
158.35.0000
158.40.0000
158.45.0000
158.50.0000
158.55.0000
158.60.0000
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
SOLID
13
17
20
23
26
29
32
35
40
45
50
55
60
34
40
45
50
56
65
72
82
95
108
122
140
160
11
12
13
14
16
18
20
24
28
35
40
45
50
Performance values quoted on page 15 do not apply to stainless steel versions.
10
®
Tel: +44 (0)1992 509888
STEEL UNIVERSAL JOINTS (T SERIES)
standard bored joints with plain bearings
A comprehensive range of good quality steel universals available in
a range of standard sizes from stock. Alternative bores, round, keywayed
or square, etc. can be produced to order. Also available in stainless steel.
Please call Technical Sales for assistance with non-standard requirements.
2
Maximum working angle is 40° for single and 80° for double joint sizes
13 – 45. This reduces to 30° and 60° respectively for size 50 and upwards.
Maximum speed 1200 rpm, see performance charts on page 15.
These plain bearing universal joints must be lubricated.
The use of gaiters is recommended.
type TS single joint
type TS double joint
type T gaiter
L20
L4
L1
D1 B
B
B
L2
L2
h7
Order Code Bores B D1
L1
Static
Torque
at
Break
L2 (Nm)
6×6
13
8×8
17
10 × 10 20
12 × 12 23
14 × 14 26
16 × 16 29
18 × 18 32
20 × 20 35
22 × 22 40
25 × 25 45
30 × 30 50
35 × 35 55
40 × 40 60
unbored 70
unbored 80
unbored 90
unbored 100
34
40
45
50
56
65
72
82
95
108
122
140
160
175
190
210
230
11
65
12
120
13
150
14
210
16
290
18
480
20
850
24 1000
28 1350
35 1750
40 2500
45 4000
50 5000
50 8000
55 11500
65 13500
70 16000
134.13.2222
134.17.2828
134.20.3232
134.23.3535
134.26.3838
134.29.4242
134.32.4545
134.35.4848
134.40.4949
134.45.5252
134.50.5656
134.55.6060
134.60.6363
134.70.0000
134.80.0000
134.90.0000
134.99.0000
D1 B
Fax: +44 (0)1992 509890
D20
D21
L5
h7
Order Code Bores B D1
136.13.2222
136.17.2828
136.20.3232
136.23.3535
136.26.3838
136.29.4242
136.32.4545
136.35.4848
136.40.4949
136.45.5252
136.50.5656
136.55.6060
136.60.6363
136.70.0000
136.80.0000
136.90.0000
136.99.0000
6×6
13
8×8
17
10 × 10 20
12 × 12 23
14 × 14 26
16 × 16 29
18 × 18 32
20 × 20 35
22 × 22 40
25 × 25 45
30 × 30 50
35 × 35 55
40 × 40 60
unbored 70
unbored 80
unbored 90
unbored 100
L2
L4
Static
Torque
at
Break
L5 (Nm)
Order
Code
D20 D21 L20
11
12
13
14
16
18
20
24
28
35
40
45
50
50
55
65
70
57 23
65
67 27
120
75 30
150
84 34
210
92 36
290
106 41
480
119 47
850
132 50 1000
151 56 1350
176 68 1750
194 72 2500
219 79 4000
248 88 5000
264 89 8000
286 96 11500
310 100 13500
360 130 16000
–
143.17
143.20
143.20
143.26
143.29
143.32
143.35
143.40
143.45
143.50
143.50
143.60
–
–
–
–
–
32
39
39
47
51
56
66
75
83
93
93
100
–
–
–
–
–
–
16.5 40
20.5 47
20.5 47
24.5 52
27.5 58
30.5 67
35.5 74
40.0 84
45.0 97
50.0 110
50.0 110
56.0 122
–
–
–
–
–
_
–
–
11
®
STEEL UNIVERSAL JOINTS (T SERIES)
standard bored joints with needle roller bearings
2
A series of good commercial quality universals with needle roller
bearings. The round bores listed are stock sizes, other diameters
or solid ends can be supplied to order. Please call Technical Sales
for alternative sizes including keywayed and square bores.
Maximum working angle is 40° for single and 80° for double joints.
Maximum speed 6000 rpm, see performance charts on page 15.
Bores listed under ‘bores & order codes’ are stock items.
Other bores are supplied to order.
type TR single joint
type TR double joint
type T gaiter
L20
L1
L4
D1 D2 B
B
D1 D2 B
L2
L2
h7
Order Code Bores B D1
138.20.3232
138.26.3838
138.32.4242
138.40.4848
138.50.5252
10 × 10
14 × 14
16 × 16
20 × 20
25 × 25
B
L1
21.5 62
27.9 74
35.6 86
42.7 108
53.0 132
h7
Order Code Bores B D1
19
23
25
33
38
139.20.3232
139.26.3838
139.32.4242
139.40.4848
139.50.5252
10 × 10
14 × 14
16 × 16
20 × 20
25 × 25
D21
L5
Static
Torque
at
Break
L2 (Nm)
40
130
300
500
1200
D20
21.5
27.9
35.6
42.7
53.0
D2
L2
L4
Static
Torque
at
Break
L5 (Nm)
20
26
32
40
50
19
23
25
33
38
92
110
133
164
204
30
40
36
130
47
300
56
500
72 1200
Order
Code
143.20
143.26
143.32
143.40
143.50
D20 D21 L20
39
47
56
75
93
20.5
24.5
30.5
40.0
50.0
47
52
67
84
110
unbored joints
Type TS and TR joints are available without bores. Order codes
for unbored versions are as indicated with the last four digits
replaced by zeros.
(e.g.138.20.0000)
12
®
Tel: +44 (0)1992 509888
STEEL UNIVERSAL JOINTS (H SERIES)
standard bored joints with plain bearings
A comprehensive series of high quality universals,
manufactured to DIN 808. Please call Technical Sales for
alternative sizes including keywayed and square bores.
2
Maximum working angle is 45° for single and 90° for double joints.
Maximum speed 1500 rpm, see performance charts on page 16.
Bores listed under ‘bores & order codes’ are stock items. Other
bores supplied to order.
These plain bearing universal joints must be lubricated.
The use of gaiters is recommended.
type HS single joint
type HS double joint
type H single gaiter
L20
L4
L1
D1 B
D1 B
B
L2
L2
B
L2
L5
D20
D21
L2
A double gaiter to suit double
joints is available if required.
h7
Order Code Bores B D1
144.132.2828
144.160.2222
144.161.2828
144.162.3232
144.201.3232
144.202.3535
144.251.3535
144.252.4242
144.321.4242
144.322.4848
144.401.4848
144.402.5252
144.501.5252
144.502.5858
144.631.5858
144.632.6363
8×8
6×6
8×8
10 × 10
10 × 10
12 × 12
12 × 12
16 × 16
16 × 16
20 × 20
20 × 20
25 × 25
25 × 25
32 × 32
32 × 32
40 × 40
13
16
16
16
20
20
25
25
32
32
40
40
50
50
63
63
Fax: +44 (0)1992 509890
L1
42
34
40
52
48
62
56
74
68
86
82
108
104
132
130
166
Static
Torque
at
Break
L2 (Nm)
h7
Order Code Bores B D1
L2
11
9
11
15
13
18
15
22
16
25
23
32
29
40
33
48
–
–
146.161.2828
146.162.3232
146.201.3232
146.202.3535
146.251.3535
146.252.4242
146.321.4242
146.322.4848
146.401.4848
146.402.5252
146.501.5252
146.502.5858
146.631.5858
146.632.6363
–
–
11
15
13
18
15
22
16
25
23
32
29
40
33
48
30
40
40
40
120
120
220
220
380
380
800
800
1550
1550
2800
2800
–
–
8×8
10 × 10
10 × 10
12 × 12
12 × 12
16 × 16
16 × 16
20 × 20
20 × 20
25 × 25
25 × 25
32 × 32
32 × 32
40 × 40
–
–
16
16
20
20
25
25
32
32
40
40
50
50
63
63
L4
Static
Torque
at
Break
L5 (Nm)
Order
Code
D20 D21 L20
–
–
62
74
74
88
86
104
104
124
128
156
160
188
198
238
–
–
22
22
26
26
30
30
37
37
47
47
56
56
68
72
–
153.16
153.16
153.16
153.20
153.20
153.25
153.25
153.32
153.32
153.40
153.40
153.50
153.50
153.63
153.63
–
35
35
35
36
36
44
44
62
62
73
73
90
90
100
100
–
–
40
40
120
120
220
220
380
380
800
800
1550
1550
2800
2800
–
–
16 32
16 32
16 32
20 40
20 40
24 45
24 45
32 55
32 55
40 75
40 75
50 95
50 95
60 115
60 115
13
®
STEEL UNIVERSAL JOINTS (H SERIES)
economy series standard bored joints with plain bearings
2
A series of economical joints for low speed transmissions.
They are intended only for manual operation or intermittent
low speed motorised applications.
These plain bearing universal joints must be lubricated.
The use of gaiters is recommended.
type HE single joint
type HE double joint
type H single gaiter
L20
L4
L1
D1 B
D1 B
B
L2
L2
B
L2
L5
D20
D21
L2
A double gaiter to suit double
joints is available if required.
h8
Order Code Bores B D1
148.13.2828
148.16.3232
148.20.3535
148.25.4242
148.32.4848
148.40.5252
148.50.5858
8×8
10 × 10
12 × 12
16 × 16
20 × 20
25 × 25
32 × 32
13
16
20
25
32
40
50
L1
42
52
62
74
86
108
132
Static
Torque
at
Break
L2 (Nm)
h8
Order Code Bores B D1
L2
11
15
18
22
25
32
40
–
149.16.3232
149.20.3535
149.25.4242
149.32.4848
149.40.5252
149.50.5858
–
15
18
20
25
32
40
25
35
90
180
320
650
1330
–
10 × 10
12 × 12
16 × 16
20 × 20
25 × 25
32 × 32
14
®
–
16
20
25
32
40
50
L4
Static
Torque
at
Break
L5 (Nm)
Order
Code
D20 D21 L20
–
74
88
104
124
156
188
–
22
26
30
37
47
56
–
153.16
153.20
153.25
153.32
153.40
153.50
–
35
36
44
62
73
90
–
35
90
180
320
650
1300
–
16
20
24
32
40
50
–
32
40
45
55
75
95
Tel: +44 (0)1992 509888
PERFORMANCE DATA (T SERIES)
types TL & TS, plain bearings – 1200 rpm max
– 200 rpm for sizes 60-100
using the nomogram
9000
7000
6000
5000
4000
The nomogram charts the maximum dynamic moment for each size
of joint. The curves represent the limit of performance and must not
be exceeded, however momentarily, by peak impulse loads.
3000
2000
The product of speed of rotation x working angle is given for values
from 250–12000. The upper speed limit for this series is 1200 rpm and
this corresponds to a maximum working angle of 10° at this speed.
1000
800
700
600
500
400
Working angles up to 45° are practicable provided the corresponding
speeds are held within the limits of the nomogram. A double joint working
at 90° is considered the equivalent of two singles working at 45°.
300
200
Torque (Nm)
(Please note that the nomograms do not apply to joints
assembled as telescopic drive shafts)
selection
90
70
60
50
40
1. Determine the driving torque of the application in Newton metres
(Nm) and the speed of rotation in revolutions per minute (rpm).
If converting from other units:
30
1 lbf ft = 1.36 Nm
1 kpm = 9.81 Nm
20
10
8
7
6
5
4
The relationship between driving torque, speed of rotation and
power transmitted is expressed by the formulæ:
torque (Nm) = 7120 × HP
rpm
3
2
or
9550 × kW
rpm
2. Find the product of rpm × working angle (β) and select the
appropriate service factor (SF) from table A or B after identifying
Table A
rpm × β 250 or less
Operating conditions
hrs per day
SF
Severe
‘Uniform’ loads – typically electric motors driving fans, centrifugal
pumps or conveyors under constant load conditions.
12000
11111
rpm x β (working angle)
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
1
or compressors, all driven by electric motors.
B
more than 250
‘Severe Intermittent’ loads – typically rolling mills or crushers or
‘intermittent’ type loads driven by I.C. motors with less than 4 cylinders.
<3
2.5
3.0
8
3.0
3.5
>8
3.5
4.0
<3
3.0
3.6
8
3.6
4.0
>8
4.0
5.0
3.5
4.0
4.5
4.0
5.0
6.0
3. If table A is relevant, multiply Nm × SF and select a joint with a
static torque figure in excess of this value.
If table B is relevant, apply the products of Nm × SF and rpm × β
to the nomogram and select the joint with the performance curve
immediately above the point of intersection.
type TR, needle roller bearings – 6000 rpm max
– 3000 rpm for sizes 40 and 50
using the nomogram
Torque (Nm)
500
400
300
200
The nomogram charts the maximum dynamic moment for each size
of joint. The curves represent the limit of performance and must not
be exceeded, however momentarily, by peak impulse loads.
100
90
80
70
60
The product of speed of rotation × working angle is given for values
from 200–40000. The upper speed limit for this series is 6000 rpm and
this corresponds to a maximum working angle of 6° 30’ at this speed.
50
40
30
Working angles up to 45° are practicable provided the
corresponding speeds are held within the limits of the nomogram.
A double joint working at 90° is considered the equivalent of two
singles working at 45°.
20
10
9
8
7
6
selection
Fax: +44 (0)1992 509890
40000
50000
60000
70000
80000
90000
100000
30000
rpm x β (working angle)
20000
5000
6000
7000
8000
9000
10000
4000
3000
2000
3. Apply the values obtained in 1) and 2) to the nomogram and
select the joint with the performance curve immediately above
the point of intersection. Normal safety factors are built into the
nomogram which is based on tests conducted with joints
operating under arduous conditions.
500
600
700
800
900
1000
1
400
2. Find the product of rpm × working angle (β) and check that the
result is within the limits of the nomogram.
300
2
200
1. Determine the driving torque of the application in Newton metres
(Nm) and the speed of rotation in revolutions per minute (rpm)
100
5
4
3
15
®
2
PERFORMANCE DATA (H SERIES)
type HS, plain bearings – 1500 rpm max
selecting joint size
The correct joint size for a given application can be determined after
establishing the following criteria:
500
400
300
Torque or power to be transmitted
Speed of rotation
Maximum working angle
Fluctuations in load or prime mover output
SIZE 63
200
using the nomogram
SIZE 50
100
90
The nomogram is expressed Nm and is valid for the continuous
transmission of a constant or near constant load where the product of
speed (rpm) × working angle exceeds 300. The curves are valid for
working angles up to 5°. Where use is intermittent, the stated values for
transmissible torque can be increased by 20% or conversely, the
calculated values in the following examples could be reduced by 16%.
In marginal cases, this would allow the selection of a smaller joint.
80
70
60
SIZE 40
50
40
Torque (Nm)
In addition to torque and speed of rotation, the working angle of the
joint has a bearing on its selection. The larger the working angle, the
higher the ‘effective’ load through the joint.
30
SIZE 32
20
SIZE 25
10
9
The factors tabled below will make the necessary correction as shown
in the following examples.
8
SIZE 20
7
6
5
Correction Factors
SIZE 16
15°
20°
25°
30°
35°
40°
3
SIZE 13
2
0.63
0.45
0.30
0.10
If converting from other units:
2000
800
1
1 kW = 1.341 HP
1 lbf ft = 1.356 Nm
1000
0.75
600
0.84
400
0.92
300
Correction
Factor
10°
200
Working
Angle
4
100
2
(Please note that the nomograms do not apply to joints
assembled as telescopic drive shafts)
RPM
Example 1
Transmitted torque
Speed of rotation
Working angle
Correction factor (from table)
∴ corrected torque = 68
0.75
=
50lbf ft or (68 Nm)
500 rpm
20°
0.75
91 Nm
Low Speed/Low Working Angle
If the product of speed (rpm) × working angle is less than 300 the
following method will determine an appropriate joint size.
1. Establish the torque in Nm
2. Determine the maximum working angle of the joint
3. Substitute these values in the corresponding formula:
Select the joint with the performance curve at or immediately above the
point of intersection of the horizontal corresponding to 91 Nm and the
vertical corresponding to 500 rpm, i.e. Joint Size 40. Note that the
length of the joint has no bearing on this calculation.
Example 2
Power rating
Speed of rotation
Working angle
Correction factor (from table)
∴ corrected torque = 3.5
0.45
=
3.5 HP or (2.6 kW)
400 rpm
30°
0.45
7.8 HP or (5.8 kW)
=
=
=
712 × HP or 9550 × kW
rpm
rpm
712 × 7.8
400
139 Nm
(
For continuous use
600 × torque
(100 – working angle)
Example 3
Transmitted torque
Speed of rotation
Max. Working angle
∴ torque rating
)
50 Nm
Manual (intermittent)
25°
=
500 × 50
(100 – 25)
=
25000
75
=
333 Nm
Type HS joint size 32 (static torque 380 Nm) or type HE joint size 40
(static torque 650 Nm) should be selected.
Select the joint with the performance curve at or immediately above the
point of intersection of the horizontal corresponding to 139 Nm and the
vertical corresponding to 400 rpm, i.e. Joint Size 50. Once again, the
length of the joint has no bearing on this calculation.
16
®
500 × torque
(100 – working angle)
4. Select a joint with a static break torque in excess of the figure
obtained.
The power rating (HP or kW) must first be resolved to torque x rpm in
i.e. torque (Nm)
For intermittent use
Tel: +44 (0)1992 509888
MINIATURE STEEL UNIVERSAL JOINTS
miniature
standard bored joints with plain bearings
miniature
steel telescopic drive shaft assemblies
2
type M
A range of good quality miniature universal joints suitable for
motorised applications up to 500 rpm.
Also available in stainless steel to special order.
sub-miniature
steel universal joints
type SM
L1
L2
D1
L3
B1
Bores
Order Code B1 × B2
B2
D1
L1
L2
L3
177.06.1414 3.00 × 3.00 6.0
177.08.1818 4.00 × 4.00 8.0
177.10.2020 5.00 × 5.00 10.0
18.0
24.0
30.0
5.5
7.2
9.0
7.0
9.6
12.0
weight
g
Order Code
Bores
B1 × B2
D1
L1
L2
L3
3.0
7.1
12.5
178.03.V203
178.04.V204
178.05.V205
1.5 × 1.5
2.0 × 2.0
2.5 × 2.5
3.0
4.0
5.0
12.0
14.0
15.0
4.0
4.5
4.5
4.0
5.0
6.0
Please call Technical Sales for performance data relating to type M and type SM universal joints.
Fax: +44 (0)1992 509890
17
®
SPECIAL JOINTS & TELESCOPES
2
The universal joints featured in this catalogue can be specified with
non-stock bores and to special dimensions. Any of the listed joint sizes
can be built as telescopic drive shafts. See next page.
for a quotation. Please use a separate photocopy for each component.
.........................
......................... pcs single joint
*Needle Roller
Plain Bearing
TYPE ............................... SIZE Ø ....................
.........................
✔ for standard. Specify dimensions only if
absolutely necessary.
L1
L7
F
F
Overall length L1 ........................................
End
1
Ø
End
2
Half length L7 .............................................
Where specified, keyways will be spaced at 90°.
L2
*Delete where appropriate
.........................
*Needle Roller
Plain
TYPE ................. SIZE Ø..............
......................... pcs single joint
.........................
L4
F
Ø
✔ for standard. Specify dimensions only
if absolutely necessary.
F
End
1
Overall length L4 ........................................
End
2
L2
Shackle Centres L5 ....................................
Where specified, keyways will be spaced in
line unless requested, otherwise at 180°.
L5
*Delete where appropriate
bore details end 1
B
4
3
bore details end 2
K
S
H
B
K
S
H
4
1
2
cross hole
positions
3
1
2
cross hole
positions
W
W
Enter dimension required or ✔ if standard
Plain Bore
B .................
dia
Plain Bore
B .................
dia
Keywayed Bore
K .................
dia
Keywayed Bore
K .................
dia
Key width
W .................
Key width
W .................
Square Bore
S .................
A/F
Square Bore
S .................
A/F
Hex Bore
H .................
A/F
Hex Bore
H .................
A/F
Bore depth
L2 .................
Bore depth
L2 .................
(standard is to BS 4235 Part 1)
(standard is to BS 4235 Part 1)
Tapped hole at posn ................. & posn ................. Tapped ...........
Tapped hole at posn ................. & posn ................. Tapped ...........
Cross hole at posn
Cross hole at posn
................. & posn ................. dia .................
Cross Hole datum F .........................................................................
18
®
................. & posn ................. dia .................
Cross Hole datum F .........................................................................
Tel: +44 (0)1992 509888
TELESCOPIC DRIVE SHAFTS
The universal joints featured in this catalogue can be specified with
non-stock bores and to special dimensions and be built as telescopic
drive shafts.
for a quotation. Please use a separate photocopy for each component.
2
.........................
*Needle Roller joint
Plain
......................... pcs telescope based on joint TYPE ............................... SIZE Ø ....................
.........................
*Delete where appropriate
Min retracted length V ................................
Where specified, keyways will be spaced in
line unless requested, otherwise at 180°.
Max extended length V1 ..............................
L2
L2
F
Ø
F
End
1
End
2
V = MIN RETRACTED LENGTH
V1 = MAX EXTENDED LENGTH
bore details end 1
3
K
B
4
bore details end 2
S
H
B
K
S
H
4
1
3
1
2
cross hole
positions
2
cross hole
positions
W
W
Enter dimension required or ✔ if standard
Plain Bore
B .................
dia
Plain Bore
B .................
dia
Keywayed Bore
K .................
dia
Keywayed Bore
K .................
dia
Key width
W .................
Key width
W .................
(standard is to BS 4235 Part 1)
(standard is to BS 4235 Part 1)
Square Bore
S .................
A/F
Square Bore
S .................
A/F
Hex Bore
H .................
A/F
Hex Bore
H .................
A/F
Bore depth
L2 .................
Bore depth
L2 .................
Tapped hole at posn ................. & posn ................. Tapped ...........
Tapped hole at posn ................. & posn ................. Tapped ...........
Cross hole at posn
Cross hole at posn
................. & posn ................. dia .................
Fax: +44 (0)1992 509890
................. & posn ................. dia .................
Cross Hole datum F .........................................................................
Cross Hole datum F .........................................................................
19
®
QUALITY PRODUCTS
•
D E L I V E RY W H E N
YOU NEED IT
•
H U C O S U P P O RT
20
®
Tel: +44 (0)1992 509888
```