BOSCH REXROTH
TORQUE RESIST
R072723000
$1,971.06 USD
- BOSCH REXROTH
- Material:R072723000
- Model:TORQUE RESIST.BUSH KBDR4-LR-30DD
Quantity in stock: 0
The Bosch Rexroth TORQUE RESIST.BUSH KBDR4-LR-30DD (R072723000) is a high-quality torque-resistant linear bushing designed for self-supporting, torsionally stiff guides with a single shaft. This particular model incorporates four ball guide grooves that enable the transfer of torque, making it suitable for applications requiring precise linear movement combined with rotational motion. The KBDR4-LR-30DD features an integrated crossroller bearing that comes pre-lubricated, ensuring smooth operation and reducing maintenance requirements. The outer sleeve of the bushing is hardened and ground for durability, while the POM ball retainer and balls made of rolling bearing steel contribute to the unit's robust performance. The design includes integrated wiper seals to protect against contamination, extending the life of the bushing. With a shaft diameter detailed as size 'd', this linear bushing can accommodate matching shaft profiles that are machined according to customer specifications. Capable of handling dynamic load capacities and static load ratings that are specified as minimal values due to variable loading orientations and directions, this model also has defined dynamic torsional moment load capacity Mt and tightening torque values. It operates effectively within a permissible ambient temperature range, ensuring reliability across different working environments. The maximum acceleration (amax), limit speed for grease (nmax), and maximum permissible linear speed (vmax) are specified to guide optimal usage conditions. Overall, the Bosch Rexroth KBDR4-LR-30DD is part of a product group known for its precision in linear motion systems. It weighs in at a specific value, indicating its suitability for various design specifications where weight considerations are crucial. Its construction reflects Bosch Rexroth's commitment to engineering excellence in providing components for sophisticated mechanical systems.
Torque-resistant LB, 4-LR-30, with two seals
Torque-resistant linear bushing (with rotation ball bearing)
Ball guide grooves = 4
Shaft diameter d = 30
With two seals
Without shaft
Unpacked Weight: 1.338 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 cross-roller bearing with initial lubrication |
| Hardened and ground outer sleeve |
| POM ball retainer |
| Balls made of rolling bearing steel |
| Integrated wiper seals |
| 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 | 80 mm -0,3 |
| Size t | 10 |
| Series | Torque |
| Footnote dynamic load capacity C | The load capacities indicated are minimal values as the orientation and direction of loading cannot always be clearly defined. |
| Shaft diameter, detailed | 28 |
| Max. acceleration amax | 150 |
| Permissible ambient temperature | -10 °C ... +80 °C |
| Limit speed (grease) nmax | 800 |
| Size L3 | 6.8 |
| Maximum permissible linear speed vmax | 3 |
| Tightening torque | 12.7 |
| Size D3 | 52 |
| Footnote static load capacity C0 | The load capacities indicated are minimal values as the orientation and direction of loading cannot always be clearly defined. |
| Static load rating C0 | 23200 |
| Dynamic torsional moment load capacity Mt | 229 |
| Footnote tightening torque | 마찰 계수 0.125에서의 조임 토크 |
| Footnote diameter d | Actual shaft diameter varies |
| Size D4 | 86 |
| Size L2 | 17 |
| Productgroup ID | 17 |
| Size D1 h7 | 100 |
| Permissible ambient temperature (max) | |
| Static load capacity C0 cross-roller bearing | 18000 |
| Dynamic load capacity C cross-roller bearing | 13200 |
| Permissible ambient temperature (min) | |
| Static torsional moment load capacity Mt0 | 412 |
| Size S | 6.6 |
| Size L1 | 17 |
| Shaft diameter d | 30 |
| Linear guide type | Linear bushing and shaft |
| Filter for linear bushings and shafts | Linear bushings |
| Format of linear bushings | LR – With rotation ball bearing |
| Dynamic load capacity C | 14800 |
| Size L | 80 |
| Size D2 | 47 |
| Weight | 1.338 |
| Size D1 with tolerance |
General technical data
|
Ø d 1) |
mm |
20 | 25 | 30 | 40 |
|
amax |
m/s² |
150 | |||
|
vmax |
m/s |
3 | |||
|
m |
kg |
0.45 | 0.75 | 1.25 | 2.3 |
|
MA 2) |
Nm |
3.9 | 12.7 | 29.4 | |
|
Operating conditions |
|||||
|
Permissible ambient temperature (min ... max) |
-10 °C ... +80 °C | ||||
| 1) | Actual shaft diameter varies |
| 2) | Tightening torque at friction factor 0.125 |
Load capacities and load moments
|
Ød 1) |
mm |
20 | 25 | 30 | 40 | |
|
C 2) |
N |
6200 | 9800 | 14800 | 24400 | |
|
C0 2) |
N |
11300 | 16100 | 23200 | 37500 | |
|
Mt |
Nm |
66 | 129 | 229 | 500 | |
|
Mt0 |
Nm |
133 | 239 | 412 | 882 | |
|
Cross-roller bearing |
C |
N |
5900 | 9110 | 13200 | 22800 |
|
C0 |
N |
7350 | 11500 | 18000 | 32300 | |
|
Speed limit |
rpm |
1200 | 1000 | 800 | 600 | |
| 1) | Actual shaft diameter varies |
| 2) | The load ratings indicated are minimal values as the orientation and direction of load 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 |
|
MA |
Tightening torque |
Nm |
|
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) | M6 x 0.75 lube port for cross-roller bearing, L3 thread depth |
| b) | Concentricity tolerance |
| c) | Recommended installation |
| d) | Fixing screw |
| e) | Lube nipple |
Dimensions
|
Ød 1) |
mm |
20 | 25 | 30 | 40 | |
|
Ød ‒ actual 2) |
mm |
18.2 | 23 | 28 | 37.4 | |
|
D |
h7 |
mm |
40 | 50 | 61 | 76 |
|
D1 |
h7 |
mm |
66 | 78 | 100 | 120 |
|
D2 |
mm |
34 | 40 | 47 | 62 | |
|
D3 |
mm |
34 | 42 | 52 | 64 | |
|
D4 |
mm |
56 | 68 | 86 | 104 | |
|
L |
60 mm -0.2 | 70 mm -0.3 | 80 mm -0.3 | 100 mm -0.3 | ||
|
L1 |
mm |
13 | 16 | 17 | 20 | |
|
L1 |
13 mm | 16 mm | 17 mm | 20 mm | ||
|
L2 |
mm |
12 | 13 | 17 | 23 | |
|
L3 |
mm |
5.2 | 6.4 | 6.8 | 8 | |
|
S |
mm |
4.5 | 6.6 | 9 | ||
|
S1 |
M4 | M5 | M6 | |||
|
t |
mm |
7 | 8 | 10 | ||
|
Fixing screw |
M4 | M6 | M8 | |||
| 1) | Actual shaft diameter varies |
| 2) | h7 tolerance |
Installation
Radial clearance: approx. ± 5 μm
Align the tracks and wiper seals when inserting the shaft and make sure they are not skewed!
Attention:
Do not loosen the flange connection (cross-roller bearing). Tighten the fastening bolts in phases until the table value is reached.
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.
