GN 808.2 Universal joint shafts with friction bearing with longitudinal compensation


  • RoHS

Description

Specification

Bore code

  • Version K: with keyway
Steel blank
Joint bearing areas / pins / bearing sleeves
case hardened

Information

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.

On request

  • different length l1 - l2
  • Bores without keyway
  • Bores with square
  • with other or unequal bores

Technical information

  • Permissible r.p.m. and torque 

Mounting information

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.

Selection of the size

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.

Universal joint shafts with friction bearing with longitudinal compensation GN 808.2
GN 808.2
Filter
Description d1 d2 H7 l1-l2 d3 l3 l5 t +1 Weight
GN 808.2-22-K10-140-30 22 K 10 140-30 22 30 48 12 310
GN 808.2-22-K10-160-40 22 K 10 160-40 22 30 48 12 368
GN 808.2-22-K10-180-60 22 K 10 180-60 22 30 48 12 400
GN 808.2-25-K12-160-30 25 K 12 160-30 26 40 56 13 502
GN 808.2-25-K12-180-45 25 K 12 180-45 29 40 56 13 554
GN 808.2-25-K12-200-70 25 K 12 200-70 29 40 56 13 620
GN 808.2-25-K12-250-105 25 K 12 250-105 29 40 56 13 770
GN 808.2-28-K14-170-30 28 K 14 170-30 32 40 60 13 630
GN 808.2-28-K14-200-60 28 K 14 200-60 37 40 60 13 719
GN 808.2-28-K14-220-80 28 K 14 220-80 37 40 60 13 785
GN 808.2-28-K14-280-140 28 K 14 280-140 37 40 60 13 965
GN 808.2-32-K16-190-30 32 K 16 190-30 37 40 68 16 900
GN 808.2-32-K16-240-80 32 K 16 240-80 42 40 68 16 1093
GN 808.2-32-K16-275-115 32 K 16 275-115 42 40 68 16 1245
GN 808.2-32-K16-380-210 32 K 16 380-210 42 40 68 16 1600
GN 808.2-36-K18-230-50 36 K 18 230-50 52 40 74 17 1368
GN 808.2-36-K18-270-100 36 K 18 270-100 52 40 74 17 1560
GN 808.2-36-K18-290-110 36 K 18 290-110 58 40 74 17 1665
GN 808.2-36-K18-400-220 36 K 18 400-220 58 40 74 17 2225
GN 808.2-42-K20-250-50 42 K 20 250-50 42 45 82 18 1990
GN 808.2-42-K20-320-120 42 K 20 320-120 42 45 82 18 2400
GN 808.2-42-K20-420-220 42 K 20 420-220 42 45 82 18 3130
GN 808.2-45-K22-270-50 45 K 22 270-50 45 50 95 22 2520
GN 808.2-45-K22-330-100 45 K 22 330-100 45 50 95 22 3010
GN 808.2-45-K22-470-240 45 K 22 470-240 45 50 95 22 4140
GN 808.2-50-K25-295-50 50 K 25 295-50 50 50 108 26 3400
GN 808.2-50-K25-350-100 50 K 25 350-100 50 50 108 26 3920
GN 808.2-50-K25-420-170 50 K 25 420-170 50 50 108 26 4605
GN 808.2-58-K30-330-50 58 K 30 330-50 58 60 122 29 4880
GN 808.2-58-K30-400-110 58 K 30 400-110 58 60 122 29 5880