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BOSCH REXROTH
R067805000


$1,437.51 USD
  • BOSCH REXROTH
  • Material:R067805000
  • Model:RADIAL LINEAR BUSH KBR-50 &

Quantity in stock: 0

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
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
Friction force14
Friction coefficient μ min.0.001
Rows of balls12
SeriesRadial
Footnote friction force FRFriction force for linear bushings with separate wiper seals
Productgroup ID17
Size W24.5
Footnote dynamic load capacity CThe stated load capacities apply for the main direction of loading ρ = 0°.
Permissible ambient temperature (max)+100
Max. acceleration amax50
Footnote friction coefficient μFriction coefficients of unsealed radial linear bushings when lubricated with oil.
Permissible ambient temperature-20 °C ... +100 °C
Footnote shaft radial clearance h6/bore K6Observe the reduction in service life owing to high preload
Outer diameter D90
Footnote shaft radial clearance h6/bore JS6Observe the reduction in service life owing to high preload
Size S13
Breakaway force40
Permissible ambient temperature (min)-20
Maximum permissible linear speed vmax2
Size D90
Size C h11125
Friction coefficient μ0,001 ... 0,002
Footnote static load capacity C0The stated load capacities apply for the main direction of loading ρ = 0°.
Static load rating C024400
Shaft diameter d50
Linear guide typeLinear bushing and shaft
Format of linear bushingsO – Open
Filter for linear bushings and shaftsLinear bushings
Dynamic load capacity C20800
Friction coefficient μ max.0.002
Weight2.860
Size D1 with tolerance
Shaft radial clearance h6/bore K6+7,-30
Shaft radial clearance h6/bore JS6+14,-23
Radial clearance shaft h6 / bore H6+25,-12

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).

technical illustration-R067805000-Radial LB, 50, without seal
1) F = load N
2) ∂ = spring mm

Overall deflection depending on the load direction

Load direction

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 seals

Effect 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

technical illustration-R067805000-Radial LB, 50, without seal
technical illustration-R067805000-Radial LB, 50, without seal
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

Life expectancy calculation

General mounting instructions

Installation, securing

Lubrication

R1018, for radial linear bushings

technical illustration-R067805000-Radial LB, 50, without seal

R1018, for radial linear bushings

Shaft support rail material: Steel

Catalog

Instructions

Service

Wiper seals for open-type Radial Linear Bushings

technical illustration-R067805000-Radial LB, 50, without seal

Wiper seals for open-type Radial Linear Bushings

Steel retaining ring Elastomer wiper seal

Catalog

Instructions

Service

CAD data

Directives and standards

Notes