BOSCH REXROTH
R067805000
$1,437.51 USD
- BOSCH REXROTH
- Material:R067805000
- Model:RADIAL LINEAR BUSH KBR-50 &
Quantity in stock: 0
The Bosch Rexroth RADIAL LINEAR BUSH KBR-50 (R067805000) is an advanced linear motion component designed for high precision and heavy load applications. This radial linear bushing operates without seals, enabling it to handle very heavy loads with ease. Its design includes a radial ball redirection system that allows for multiple rows of balls, resulting in extremely high load ratings and making it suitable for circumstances where other linear guides may fail due to warping from imprecise substructures. The KBR-50 bushing features a hardened and machined steel sleeve, a ball retainer made of reinforced polyamide (PA), and rolling bearing steel balls, all contributing to its very high rigidity and extra smooth running capabilities. It has been designed with the option to be fully sealed or to operate without wiper seals, with separate wiper seals available if needed. The component is also relubricatable, ensuring long-term maintenance possibilities. With a dynamic load capacity C of up to 24.5 kN and static load rating C0 of 38 kN, the KBR-50 is capable of handling significant forces in its main loading direction. It accommodates shaft diameters d ranging from 5 mm up to 50 mm. The product's design includes two retaining rings that contribute to its stability and performance. The friction coefficient for this model is minimized at max. 0.02 when lubricated with oil, which facilitates smoother operation under various conditions. The bushing can endure a maximum acceleration of 50 m/s² and operate within an ambient temperature range from -20°C up to +80°C. Weighing approximately 1 kg, the Bosch Rexroth RADIAL LINEAR BUSH KBR-50 offers a breakaway force specific to its design parameters and achieves maximum permissible linear speed vmax relevant to its size category. With such specifications, it ensures reliable performance in demanding industrial applications requiring precise linear movement under substantial loads.
Radial LB, 50, without seal
radial linear bushing
Shaft diameter d = 50
Without seal
Unpacked Weight: 2.860 kg
High-precision linear bushing for moving very heavy loads |
Radial ball redirection allows numerous rows of balls and extremely high load ratings |
Heavy-duty guide with degrees of freedom in circumferential direction |
For applications where other linear guides tend to warp due to imprecise substructures. |
Very high rigidity |
Extra smooth running |
Fully sealed or without wiper seals |
Separate wiper seals optional |
Relubricatable |
Hardened and machined steel sleeve |
Ball retainer made of reinforced PA |
Balls made of rolling bearing steel |
Two retaining rings |
Data Sheet | Download Data Sheet |
2D CAD | Download 2D CAD |
2D CAD | Download 2D CAD |
3D CAD | Download 3D CAD |
3D CAD | Download 3D CAD |
Manual | Download Manual |
Manual | Download Manual |
Manual | Download Manual |
Manual | Download Manual |
Manual | Download Manual |
Friction force | 14 |
Friction coefficient μ min. | 0.001 |
Rows of balls | 12 |
Series | Radial |
Footnote friction force FR | Friction force for linear bushings with separate wiper seals |
Productgroup ID | 17 |
Size W | 24.5 |
Footnote dynamic load capacity C | The stated load capacities apply for the main direction of loading ρ = 0°. |
Permissible ambient temperature (max) | |
Max. acceleration amax | 50 |
Footnote friction coefficient μ | Friction coefficients of unsealed radial linear bushings when lubricated with oil. |
Permissible ambient temperature | -20 °C ... +100 °C |
Footnote shaft radial clearance h6/bore K6 | Observe the reduction in service life owing to high preload |
Outer diameter D | 90 |
Footnote shaft radial clearance h6/bore JS6 | Observe the reduction in service life owing to high preload |
Size S1 | 3 |
Breakaway force | 40 |
Permissible ambient temperature (min) | |
Maximum permissible linear speed vmax | 2 |
Size D | 90 |
Size C h11 | 125 |
Friction coefficient μ | 0,001 ... 0,002 |
Footnote static load capacity C0 | The stated load capacities apply for the main direction of loading ρ = 0°. |
Static load rating C0 | 24400 |
Shaft diameter d | 50 |
Linear guide type | Linear bushing and shaft |
Format of linear bushings | O – Open |
Filter for linear bushings and shafts | Linear bushings |
Dynamic load capacity C | 20800 |
Friction coefficient μ max. | 0.002 |
Weight | 2.860 |
Size D1 with tolerance | |
Shaft radial clearance h6/bore K6 | |
Shaft radial clearance h6/bore JS6 | |
Radial clearance shaft h6 / bore H6 |
General technical data
Ø d |
mm |
30 | 40 | 50 | 60 | 80 | |||||
amax |
m/s² |
50 | |||||||||
vmax |
m/s |
2 | |||||||||
m |
kg |
0.7 | 1.4 | 2.5 | 4.9 | 10.4 | |||||
FR |
N |
8 1) | 12 | 11 1) | 16 | 14 1) | 20 | 16 1) | 24 | 20 1) | 30 |
Breakaway force |
N |
24 | 32 | 40 | 48 | 60 | |||||
μ 2) |
0.001 ... 0.002 | ||||||||||
Rows of balls |
12 | ||||||||||
Shaft radial clearance h6/bore H6 |
µm |
+ 21 - 10 |
+ 23 - 13 |
+ 25 - 12 |
+ 26 - 15 |
+ 29 - 15 |
|||||
Shaft radial clearance h6/bore JS6 3) |
µm |
+ 12 - 20 |
+ 13 - 22 |
+ 14 - 23 |
+ 15 - 26 |
+ 16 - 27 |
|||||
Shaft radial clearance h6/bore K6 3) |
µm |
+ 6 - 25 |
+ 8 - 28 |
+ 7 - 30 |
+ 8 - 33 |
+ 8 - 36 |
|||||
Operating conditions |
|||||||||||
Permissible ambient temperature (min ... max) |
-20 °C ... +100 °C |
1) | Frictional drag for Linear Bushings with separate wiper seals |
2) | Friction coefficients of unsealed radial Linear Bushings when lubricated with oil. |
3) | Observe the reduction in service life owing to high preload |
Load capacities and load moments
Ød |
mm |
30 | 40 | 50 | 60 | 80 |
C 1) |
N |
8500 | 13900 | 20800 | 29500 | 54800 |
C0 1) |
N |
9520 | 16000 | 24400 | 34100 | 61500 |
1) | The load ratings specified apply for the main direction of loading ρ = 0°. |
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 |
FR |
Friction force |
N |
m |
Mass |
kg |
vmax |
Maximum permissible speed |
m/s |
μ |
Friction coefficient |
Definition of dynamic load ratings
Rigidity
Combining a radial Linear Bushing with a continuously supported guide shaft ensures a precise, rigid design.
The following figure shows load-dependent spring. The diagram applies for installation: Without preload With zero clearance (no preload) for load direction ρ = 0° – 90° and 270° – 360°Radial Linear Bushing rigidity
Installing with preload reduces spring. Additional spring in all parts of a linear guide (housing, shaft, shaft support rail) depends on the load direction. Guideline values for total spring with R1076 and R1010 elements: load direction factor multiplied by spring ∂ (from right diagram).
1) | F = load N |
2) | ∂ = spring mm |
Overall deflection depending on the load direction
Load direction ∂ |
0° |
90° |
180° |
270° |
Overall deflection |
1 • ∂ |
1,8 • ∂ |
3,5 • ∂ |
1,8 • ∂ |
Sealing
Radial Linear Bushings come either
fully sealed Linear Bushings with integrated wiper seals and longitudinal seal, or with separate wiper sealsEffect of load direction on load rating
The load ratings C and C0 specified for Radial Linear Bushings apply for load direction ρ = 0°. If the external load is at an angle ρ = 90° – 270°, a reduced load capacity must be factored in. The dynamic load rating is then determined by multiplying the specified dynamic load rating C or C0 by the load direction factors fρ or fρ0. This reduced load capacity can be avoided by careful installation of the radial Linear Bushings.
Load direction factors
a) | Fully sealed, lube port S1 center |
Dimensions
Ød |
mm |
30 | 40 | 50 | 60 | 80 | |
D |
mm |
60 | 75 | 90 | 110 | 145 | |
C |
h11 |
mm |
75 | 100 | 125 | 150 | 200 |
S1 |
mm |
3 | 4 | ||||
W 1) |
mm |
14 | 19.5 | 24.5 | 29 | 39 |
1) | Minimum size in relation to shaft diameter d. |
Legend
Symbol |
Description |
Unit |
Ød |
Shaft diameters |
mm |
C/C0 |
Main direction of loading |
R1018, for radial linear bushings
R1018, for radial linear bushings
Shaft support rail material: SteelCatalog
Instructions
Service
Wiper seals for open-type Radial Linear Bushings
Wiper seals for open-type Radial Linear Bushings
Steel retaining ring Elastomer wiper sealCatalog
Instructions
Service
CAD data