GN 808.2Universal Joint Shafts with Friction Bearing

Universal Joint Shafts with Friction Bearing

with Longitudinal Compensation

GN 808.2

Catalogue
d1
d2 H7
l1-l2
d3
l3
l5
GN 808.2-22-K10-140-30
22
K 10
140-30
22
30
48
310
GN 808.2-22-K10-160-40
22
K 10
160-40
22
30
48
368
GN 808.2-22-K10-180-60
22
K 10
180-60
22
30
48
400
GN 808.2-22-K10-230-100
22
K 10
230-100
22
30
48
500
GN 808.2-25-K12-160-30
25
K 12
160-30
26
40
56
502
GN 808.2-25-K12-180-45
25
K 12
180-45
26
40
56
554
GN 808.2-25-K12-200-70
25
K 12
200-70
26
40
56
620
GN 808.2-25-K12-250-105
25
K 12
250-105
26
40
56
750
GN 808.2-25-K12-300-150
25
K 12
300-150
26
40
56
900
GN 808.2-28-K14-170-30
28
K 14
170-30
29
40
60
630
GN 808.2-28-K14-200-60
28
K 14
200-60
29
40
60
719
GN 808.2-28-K14-220-80
28
K 14
220-80
29
40
60
785
GN 808.2-28-K14-280-140
28
K 14
280-140
29
40
60
990
GN 808.2-28-K14-350-200
28
K 14
350-200
29
40
60
1140
GN 808.2-28-K14-400-250
28
K 14
400-250
29
40
60
1330
GN 808.2-32-K16-190-30
32
K 16
190-30
32
40
68
900
GN 808.2-32-K16-210-40
32
K 16
210-40
32
40
68
980
GN 808.2-32-K16-240-80
32
K 16
240-80
32
40
68
1093
GN 808.2-32-K16-275-115
32
K 16
275-115
32
40
68
1245
GN 808.2-32-K16-380-210
32
K 16
380-210
32
40
68
1600
GN 808.2-32-K16-400-230
32
K 16
400-230
32
40
68
1730
GN 808.2-36-K18-230-50
36
K 18
230-50
37
40
74
1368
GN 808.2-36-K18-270-100
36
K 18
270-100
37
40
74
1560
GN 808.2-36-K18-290-110
36
K 18
290-110
37
40
74
1665
GN 808.2-36-K18-400-220
36
K 18
400-220
37
40
74
2225
GN 808.2-36-K18-500-320
36
K 18
500-320
37
40
74
2750
GN 808.2-42-K20-250-50
42
K 20
250-50
42
45
82
1990
GN 808.2-42-K20-290-90
42
K 20
290-90
42
45
82
2250
GN 808.2-42-K20-320-120
42
K 20
320-120
42
45
82
2400
GN 808.2-42-K20-420-220
42
K 20
420-220
42
45
82
3130
GN 808.2-42-K20-500-300
42
K 20
500-300
42
45
82
3660
GN 808.2-45-K22-270-50
45
K 22
270-50
47
50
95
2200
GN 808.2-45-K22-330-100
45
K 22
330-100
47
50
95
3010
GN 808.2-45-K22-470-240
45
K 22
470-240
47
50
95
4140
GN 808.2-50-K25-295-50
50
K 25
295-50
52
50
108
3400
GN 808.2-50-K25-350-100
50
K 25
350-100
52
50
108
3920
GN 808.2-50-K25-420-170
50
K 25
420-170
52
50
108
4605
GN 808.2-50-K25-500-245
50
K 25
500-245
52
50
108
4130
GN 808.2-58-K30-330-50
58
K 30
330-50
58
60
122
4880
GN 808.2-58-K30-370-85
58
K 30
370-85
58
60
122
5420
GN 808.2-58-K30-400-110
58
K 30
400-110
58
60
122
5880
GN 808.2-58-K30-500-220
58
K 30
500-220
58
60
122
7140

Bore code

  • Version K: with keyway

Steel blank

Joint bearing areas / pins / bearing sleeves

case hardened

Universal joint shafts with friction bearing GN 808.2 not only join the offset between two shafts, but also enable the alignment of lengths, which depending on the overall length l1 enables the corresponding extraction length l2. The power transmission is achieved by two universal joints  DIN 808 (type EG) a splined shaft and a sliding sleeve. 

It is important to check the accuracy when connec-ting the splined shaft to the sliding sleeve: The markings -> <- have to be opposite to each other. Any kind of misconnection leads to an inhomogeneous output and to a quick abrasion.

  • different length l1 - l2
  • Bores without keyway
  • Bores with square
  • Bores with hexagon
  • with other or unequal bores
  • Version in Stainless Steel
  • Permissible r.p.m. and torque 
 

The single universal joints transfer the initial smooth rotation as an irregular rotation. One revolution of the drive shaft via single universal joint will cause the driven shaft to accelerate and decelerate twice. The extent of the irregularity depends on the operating angle ß.

In order to obtain a smooth rotation of the driven shaft two single or one double universal joint is required. In such cases where minor irregularities in the movement are acceptable or where minor operating angles are the norm a single universal joint will do.

 

For a smooth transfer of a rotating speed, the angle of inclination ß must be equal at both ends of the connecting shaft.

 

Due to a misconnection of the universal joint shafts, the irregular rotation of each joint is not compensated, but strengthened. This allows joint bearings and wedge profiles to be destroyed. For this reason, the markings of the universal joint shaft halves have to be opposite to each other.

 

Furthermore the bearings must be as close as possible to the universal joints.

For continuous operation of universal joints with friction bearings adequate lubrication is essential. If drip lubrication is not possible they should be lubricated at least once a day. It is also possible to fit the universal joint with a gaiter GN 808.1 which can be filled with oil or grease.

Universal joints with friction bearing, Type EG

 

The table shows the transferable output N and/or torques M of universal joints DIN 808, type EG (single friction bearing) in relation to

The values are only applicable to a constant speed of rotation, constant load and an operating inclination angle of max. 10°. They are not applicable to universal joints in Stainless Steel.

For larger inclination angles ß a nominal output N increased by the correction coefficient k and/or a nominal torque M has to be selected (see example below).

Conversion formulae:

Torque M [Nm] = 9550 N[kW]/n[min-1]

Output N [kW] = M [Nm] x n [min-1]/9550

1 kW = 1.36 PS / 1 PS = 0.736 kW

Example 1

Output to be transferred N = 0.65 kW

R.p.m. n = 230 min-1

Angle of inclination ß = 10°

Correction coefficient k = 1

Indicative output N‘= Nominal output N

Intersection point P is arrived at from 0,65 kW and 230 min-1 (which corresponds to a torque of 27 Nm).

The next size up universal joint corresponding to point P is the model with a diameter d1 = 25.

Example 2

Torque to be transferred M = 27 Nm

R.p.m. n = 230 min-1

Angle of inclination ß = 30°

Correction coefficient k = 2.25

Indicative torque = 2.25 x 27 Nm = 60 Nm

Intersection point P1 is arrived at from 61 Nm and 230 min-1 (which is equivalent to an indicative output N = 1.47 kW).

The next size up universal joint corresponding to P1 is the model with a diameter d1 = 36.

 
Related products
Steel, friction bearing

DIN 808-ST

Universal joints Steel / Stainless Steel, single or double
Universal joint shafts with needle bearing

GN 808.3

Universal joint shafts with needle bearing with longitudinal compensation