BOSCH REXROTH
R072422000
$239.81 USD
- BOSCH REXROTH
- Material:R072422000
- Model:TORQUE RESIST.BUSH KBDR4-H-20DD
Quantity in stock: 0
The Bosch Rexroth TORQUE RESIST.BUSH KBDR4-H-20DD (R072422000) is a high-performance torqueresistant linear bushing designed for self-supporting, torsionally stiff guides with a single shaft. This cylindrical sleeve design integrates four ball guide grooves that are essential for transferring torque effectively. The KBDR4-H-20DD is engineered to work with matching shaft profiles that have machined ball guide grooves, and these shafts are tailored according to customer specifications. The linear bushing features an outer sleeve that is both hardened and ground for durability, while the POM ball retainer and balls made of rolling bearing steel ensure smooth motion and high load capacity. It also includes integrated wiper seals to maintain cleanliness within the system and comes equipped with a fitting key for reliable torque transmission. This model is relubricatable, which allows for easy maintenance and extended service life. With its dynamic load capacity C and static load rating C, the KBDR4-H-20DD can handle minimal values as specified since the direction of loading might not always be clearly defined. The permissible ambient temperature range in which this bushing operates effectively is from -20°C to +80°C, ensuring reliable performance in various working conditions. The maximum permissible linear speed (vmax) and static torsional moment load capacity (Mt) further define its capabilities in demanding applications. The size L specification denotes the bushing's physical dimensions, while the weight indicates its heft which contributes to overall system stability. This linear bushing is part of Bosch Rexroth's Torque Productgroup ID series, highlighting its specialized function in torque-sensitive applications. In summary, the Bosch Rexroth TORQUE RESIST.BUSH KBDR4-H-20DD offers precise guidance with high torque transmission capabilities suitable for various industrial applications requiring robust linear movement solutions. Its design emphasizes performance, longevity, and ease of maintenance making it a valuable component in sophisticated mechanical systems.
Torque-resistant LB, 4-H-20, with two seals
Torque-resistant linear bushing (cylindrical, sleeve design)
Ball guide grooves = 4
Shaft diameter d = 20
With two seals
Without shaft
Unpacked Weight: 0.181 kg
| For self-supporting, torsionally stiff guides with only one shaft |
| With four ball guide grooves for transferring torque |
| Matching shaft profiles with machined ball guide grooves |
| Shafts machined to customer specification |
| Integrated wiper seals |
| Hardened and ground outer sleeve |
| POM ball retainer |
| Balls made of rolling bearing steel |
| Fitting key for torque transmission |
| Relubricatable |
| Data Sheet | Download Data Sheet |
| 2D CAD | Download 2D CAD |
| 2D CAD | Download 2D CAD |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Size L with tolerance | 60 mm -0,2 |
| Size t | 2.5 |
| Series | Torque |
| Productgroup ID | 17 |
| Size b | 4 |
| Size D h6 | 32 |
| Footnote dynamic load capacity C | The load capacities indicated are minimal values as the direction of loading cannot always be clearly defined. |
| Shaft diameter, detailed | 18.2 |
| Permissible ambient temperature (max) | |
| Max. acceleration amax | 150 |
| Permissible ambient temperature | -10 °C ... +80 °C |
| Permissible ambient temperature (min) | |
| Maximum permissible linear speed vmax | 3 |
| Static torsional moment load capacity Mt0 | 133 |
| Footnote static load capacity C0 | The load capacities indicated are minimal values as the direction of loading cannot always be clearly defined. |
| Size L1 | 26 |
| Static load rating C0 | 11300 |
| Shaft diameter d | 20 |
| Dynamic torsional moment load capacity Mt | 66 |
| Linear guide type | Linear bushing and shaft |
| Filter for linear bushings and shafts | Linear bushings |
| Format of linear bushings | H – Sleeve design |
| Dynamic load capacity C | 6200 |
| Size L | 60 |
| Footnote diameter d | Actual shaft diameter varies |
| Size t1 | 4 |
| Weight | 0.181 |
| Size D1 with tolerance |
General technical data
|
Ø d 1) |
mm |
4 | 6 | 8 | 10 | 13 | 16 | 20 | 25 | 30 | 40 | 50 |
|
amax |
m/s² |
150 | ||||||||||
|
vmax |
m/s |
3 | ||||||||||
|
m |
kg |
0.0065 | 0.019 | 0.023 | 0.054 | 0.07 | 0.15 | 0.2 | 0.22 | 0.35 | 0.81 | 1.5 |
|
Operating conditions |
||||||||||||
|
Permissible ambient temperature (min ... max) |
-10 °C ... +80 °C | |||||||||||
| 1) | Actual shaft diameter varies |
Load capacities and load moments
|
Ød 1) |
mm |
4 | 6 | 8 | 10 | 13 | 16 | 20 | 25 | 30 | 40 | 50 |
|
C 2) |
N |
680 | 970 | 1150 | 2170 | 2120 | 4860 | 6200 | 9800 | 14800 | 24400 | 36600 |
|
C0 2) |
N |
1220 | 2280 | 2870 | 5070 | 4890 | 11200 | 11300 | 16100 | 23200 | 37500 | 74200 |
|
Mt |
Nm |
0.59 | 1.2 | 1.7 | 3.5 | 16.7 | 48 | 66 | 129 | 229 | 500 | 1100 |
|
Mt0 |
Nm |
1.05 | 2.4 | 3.7 | 8.2 | 39.2 | 110 | 133 | 239 | 412 | 882 | 3180 |
| 1) | Actual shaft diameter varies |
| 2) | The load ratings indicated are minimal values as the load direction cannot always be clearly defined. |
| The load ratings are based on a total travel of 100, 00 m. When based on 50 000 m, the values in the table need to be multiplied by 1.26. |
Legend
|
Symbol |
Description |
Unit |
|
Ød |
Shaft diameters |
mm |
|
amax |
Maximum acceleration travel |
m/s2 |
|
C |
Dynamic load capacity |
N |
|
C0 |
Static load capacity |
N |
|
m |
Mass |
kg |
|
Mt |
Dynamic torsional moment load capacity |
Nm |
|
Mt0 |
Static torsional moment laod capacity |
Nm |
|
vmax |
Maximum permissible speed |
m/s |
Reduced load capacity with short stroke
In case of short stroke, the service life of the shaft is less than that of the torque-resistant Linear Bushing. The dynamic load ratings C in the tables must therefore be multiplied by the factor fs .
| 1) | fs = factor |
| 2) | s = movement path |
Service life, shaft straightness, stabilized installation
Definition of dynamic load ratings
| a) | Sizes 4, 6, 8, 10 |
| b) | Groove depth t |
| Fitting key height t1 | |
| c) | Concentricity tolerance |
Dimensions
|
Ød 1) |
mm |
4 | 6 | 8 | 10 | 13 | 16 | 20 | 25 | 30 | 40 | 50 | |
|
Ød ‒ actual 2) |
mm |
4 | 6 | 8 | 10 | 13 | 16 | 18.2 | 23 | 28 | 37.4 | 47 | |
|
b |
mm |
2 | 2.5 | 3 | 3.5 | 4 | 5 | 7 | 10 | 15 | |||
|
D |
h6 |
mm |
10 | 14 | 16 | 21 | 24 | 31 | 32 | 37 | 45 | 60 | 75 |
|
L |
16 mm -0.2 | 25 mm -0.2 | 33 mm -0.2 | 36 mm -0.2 | 50 mm -0.2 | 60 mm -0.2 | 70 mm -0.3 | 80 mm -0.3 | 100 mm -0.3 | 112 mm -0.3 | |||
|
L1 |
mm |
6 | 10.5 | 13 | 15 | 17.5 | 26 | 33 | 41 | 55 | 60 | ||
|
L1 |
6 mm | 10.5 mm | 13 mm | 15 mm | 17.5 mm | 26 mm | 33 mm | 41 mm | 55 mm | 60 mm | |||
|
O |
mm |
- | 1 | 1.5 | 2 | 3 | 4 | ||||||
|
t |
mm |
1.2 | 1.5 | 2 | 2.5 | 3 | 4 | 4.5 | 5 | ||||
|
t1 |
mm |
2 | 2.5 | 3 | 3.5 | 4 | 5 | 7 | 8 | 10 | |||
| 1) | Actual shaft diameter varies |
| 2) | h7 tolerance |
Recommended housing tolerance: H6 or H7
Installation
Radial clearance: approx. ± 5 μm
Linear bushing and shaft for torque-resistant Linear Bushings with four ball guide grooves come separately. Align the tracks and wiper seals when inserting the shaft and make sure they are not skewed!
General mounting instructions
Initial lubrication
Linear bushings do not come with initial lubrication. Grease the Linear Bushings before use. Service life data is based on initial lubrication and relubricated Linear Bushings.