GN 808.3 Universal joint shafts with needle bearing with longitudinal compensation


  • RoHS

Description

Specification

Bore codes

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

Information

Universal joint shafts with needle bearing GN 808.3 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 achive-bed by two universal joints  DIN 808 (type EW) a splined shaft and a sliding sleeve. It is important to check the accuracy when connecting 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

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 needle bearing, Type EW

The table shows the transferable output N and/or torques M of universal joints DIN 808, type EW (single needle bearing) in relation to the r.p.m. n. 
The values are only applicable to a constant speed of rotation, constant load and an operating inclination angle of max. 10°.
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 formular:
Torque M [Nm] = 9550 N[kW]/n [min-1]
Output N [kW] = M [Nm] x n [min-1]
1 kW = 1.36 PS / 1 PS = 0.736 kW
Example 1
Torque to be transferred N = 5.5 kW
R.p.m. n = 2300 min-1
Angle of inclination ß = 10°
Correction coefficient k = 1
Indicative output N = Nominal output N
Intersection point P is arrived at from 5.5 kW and 2300 min-1 (which corresponds to a torque of 23 Nm).
The next size up universal joint corresponding to point P is the model with a diameter d1 = 28.
Example 2
Torque to be transferred M = 23 Nm
R.p.m. n = 2300 min-1
Angle of inclination ß = 18°
Correction coefficient k = 1.43
Indicative torque = 1.43 x 23 Nm = 33 Nm
Intersection point P1 is arrived at from 33 Nm and 2300 min-1 (which is equivalent to an indicative output N = 7.9 kW).
The next size up universal joint corresponding to P1 is the model with a diameter d1 = 32.

Universal joint shafts with needle bearing with longitudinal compensation GN 808.3
GN 808.3
Filter
Description d1 d2 H7 l1-l2 d3 l3 l5 t +1 Weight
GN 808.3-22-K10-140-30 22 K 10 140-30 22 30 48 12 320
GN 808.3-22-K10-160-40 22 K 10 160-40 22 30 48 12 360
GN 808.3-22-K10-180-60 22 K 10 180-60 22 30 48 12 395
GN 808.3-25-K12-160-30 25 K 12 160-30 26 40 56 13 500
GN 808.3-25-K12-180-45 25 K 12 180-45 26 40 56 13 510
GN 808.3-25-K12-200-70 25 K 12 200-70 26 40 56 13 563
GN 808.3-25-K12-250-105 25 K 12 250-105 26 40 56 13 755
GN 808.3-28-K14-170-30 28 K 14 170-30 29 40 60 13 627
GN 808.3-28-K14-200-60 28 K 14 200-60 29 40 60 13 730
GN 808.3-28-K14-220-80 28 K 14 220-80 29 40 60 13 804
GN 808.3-28-K14-280-140 28 K 14 280-140 29 40 60 13 972
GN 808.3-32-K16-190-30 32 K 16 190-30 32 40 68 16 910
GN 808.3-32-K16-240-80 32 K 16 240-80 32 40 68 16 1106
GN 808.3-32-K16-275-115 32 K 16 275-115 32 40 68 16 1250
GN 808.3-32-K16-380-210 32 K 16 380-210 32 40 68 16 1640
GN 808.3-36-K18-230-50 36 K 18 230-50 37 40 74 17 1355
GN 808.3-36-K18-270-100 36 K 18 270-100 37 40 74 17 1575
GN 808.3-36-K18-290-110 36 K 18 290-110 37 40 74 17 190
GN 808.3-36-K18-400-220 36 K 18 400-220 37 40 74 17 2241
GN 808.3-42-K20-250-50 42 K 20 250-50 42 45 82 18 1947
GN 808.3-42-K20-320-120 42 K 20 320-120 42 45 82 18 2480
GN 808.3-42-K20-420-220 42 K 20 420-220 42 45 82 18 3130
GN 808.3-45-K22-270-50 45 K 22 270-50 47 50 95 22 2540
GN 808.3-45-K22-330-100 45 K 22 330-100 47 50 95 22 3060
GN 808.3-45-K22-470-240 45 K 22 470-240 47 50 95 22 4140
GN 808.3-50-K25-295-50 50 K 25 295-50 52 50 108 26 3375
GN 808.3-50-K25-350-100 50 K 25 350-100 52 50 108 26 3940
GN 808.3-50-K25-420-170 50 K 25 420-170 52 50 108 26 4680
GN 808.3-58-K30-330-50 58 K 30 330-50 58 60 122 29 4900
GN 808.3-58-K30-400-110 58 K 30 400-110 58 60 122 29 5800