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BOSCH REXROTH
R067312540


$118.83 USD
  • BOSCH REXROTH
  • Material:R067312540
  • Model:KBB-O-25-D

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.
***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 SUPER LINEAR BUSH KBB-O-25-D (R067312540) is a meticulously designed linear bushing that stands out for its high-quality construction and performance capabilities. This open linear bushing, without self-alignment features, is ideally suited for applications on fully supported shafts where precision and resistance to warping are crucial. It has been engineered with steel bearing plates that have machined ball guide grooves and optimized ball lead-in chamfers, ensuring exceptionally smooth travel and an extended service life. The KBB-O-25-D is characterized by its low friction coefficient, which ranges from 0.01 to 0.025, indicating efficient operation even under varying load conditions. It boasts a dynamic load capacity (C) and static load rating (C0), signifying its ability to handle significant loads in the main direction of application. The product operates effectively within a permissible ambient temperature range of -30°C to +80°C, demonstrating versatility across different working environments. This model comes equipped with one seal that contributes to the unit's low frictional drags when not under radial load; these drags are influenced by speed and lubrication factors. The breakaway force is minimal, facilitating easy starts and stops during operation. Additionally, the bushing can achieve maximum permissible linear speeds of up to 5 m/s; however, it's important to note that at such high velocities, the service life may be limited due to increased wear on plastic components. With an outer diameter (D) of size E10 and a weight of 0.041 kg, this linear bushing maintains radial clearance within precise specifications for optimal performance. The design includes an integrated longitudinal seal or optional external seals for protection against contaminants. The ball retainer and outer sleeve are constructed from PA or POM materials while the balls themselves are made from rolling bearing steel—no initial lubrication is required upon installation. Overall, the Bosch Rexroth SUPER LINEAR BUSH KBB-O-25-D offers a reliable solution for linear motion applications requiring high-speed capabilities and precision without succumbing to distortion or misalignment issues commonly associated with less robust systems.


Super LB B, open, 25, with one seal

Super linear bushing
Super B (no self-alignment feature)
Open
Shaft diameter d = 25
With one seal

Unpacked Weight: 0.12 kg
Low-cost linear bushing for high requirements
Steel bearing plates with machined ball guide grooves and optimized ball lead-in chamfers for outstandingly smooth travel and a long service life
Without self-alignment feature for transferring lower tipping force along the axial direction
Open linear bushing on fully supported shafts for applications where other linear guides tend to warp due to imprecise substructures.
High travel speed (5 m/s)
With longitudinal seal
Integrated wiper seals, external seals or no wiper seals
Ball retainer and outer sleeve made of PA or POM
Balls made of rolling bearing steel
No initial lubrication
Rows of balls5
SeriesSuper B (no self-alignment feature)
Footnote friction force FR1. One wiper seal: Multiply value with factor 0.5 2. Frictional drags generated by linear bushings with integrated wiper seals on two sides when not under radial load. The frictional drags depend on speed and lubrication.
Size C1 H1343.7
Footnote dynamic load capacity CThe load capacities apply for the main direction of loading.
Max. acceleration amax150
Footnote friction coefficient μFriction coefficients of unsealed linear bushings when lubricated with oil. The friction coefficient is lowest under heavy load, but can still be above the specified value even under a low load.
Permissible ambient temperature-10 °C ... +80 °C
Size E11.5
Outer diameter D40
Breakaway force4.5
Maximum permissible linear speed vmax3
Size D40
Friction coefficient μ0,001 ... 0,0025
Footnote static load capacity C0The load capacities apply for the main direction of loading.
Static load rating C02250
Size C h1358
Size C21.85
Friction coefficient μ max.0.0025
Note: Maximum permissible speed vmaxSpeeds of up to 5 m/s possible. Service life is limited by heightened wear to plastic parts. Tests have shown total travel from 50 • 105 m to 100 • 105 m without failure.
Friction force2
Friction coefficient μ min.0.001
Productgroup ID17
Permissible ambient temperature (max)+80
Angle α57
Permissible ambient temperature (min)-10
Friction force FR footnote 2Frictional drags generated by linear bushings with integrated wiper seals on two sides when not under radial load. The frictional drags depend on speed and lubrication.
Footnote breakaway forceOne wiper seal: Multiply value with factor 0.5
Shaft diameter d25
Linear guide typeLinear bushing and shaft
Filter for linear bushings and shaftsLinear bushings
Format of linear bushingsO – Open
Dynamic load capacity C4130
Weight0.12
Size D1 with tolerance
Radial clearance shaft h6/bore K7+25,-7
Radial clearance shaft/bore h6/H7+43,+11
Radial clearance shaft h6/bore M7+18,-14

General technical data

Ø d

mm

12 16 20 25 30 40 50

amax

m/s²

150

vmax 1)

m/s

3

m

kg

0.018 0.022 0.051 0.102 0.155 0.3 0.48

FR 2)

N

0.8 3 1 4 1.5 5 2 6 2.5 8 3 10 4 12

Breakaway force 3)

N

1.5 6 2 9 3 10 4.5 14 6 18 8 24 10 30

μ 4)

0.001 ... 0.0025

Rows of balls

4 5

Shaft radial clearance h6/bore H7

µm

+ 38
+ 10
+ 43
+ 11
+ 50
+ 12

Shaft radial clearance h6/bore K7

µm

+ 23
- 5
+ 25
- 7
+ 29
- 9

Shaft radial clearance h6/bore M7

µm

+ 17
- 11
+ 18
- 14
+ 20
- 18

Operating conditions

Permissible ambient temperature (min ... max)

-10 °C ... +80 °C
1) Speeds of up to 5 m/s possible. Service life is limited by heightened wear to plastic parts. Tests have shown total travel from 50 • 105 m to 100 • 105 m without failure.
2) Frictional drags generated by Linear Bushings with integrated wiper seals on two sides when not under radial load. The frictional drags depend on speed and lubrication.
3) One wiper seal: Multiply by a factor of 0.5.
4) Friction coefficients of unsealed Linear Bushings when lubricated with oil. The friction coefficient is lowest under heavy load, but can still be above the specified value even under a low load.

Load capacities and load moments

Ød

mm

12 16 20 25 30 40 50

C 1)

N

1060 1500 2570 5040 5020 8620 12500

C0 1)

N

510 830 1180 2770 2880 4480 6620
1) The load ratings apply for the main direction of loading.
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

For load in the direction of opening, please refer to the loading diagrams (see "Diagrams" section).

Impact of load direction on load rating of open Linear Bushings

The load ratings C and C0 apply for the main direction of loading ρ = 0°. For all other load directions, the load ratings must be multiplied by the factors fρ (dynamic load rating C) or fρ0 (static load rating C0).

Installing specific Linear Bushings can prevent reductions in load capacity (see Linear Set with side opening).

technical illustration-R067312540-Super LB B, open, 25, with one seal

Reduced load capacity with short stroke

In case of short stroke, the service life of the shaft is less than that of the super Linear Bushing. The load ratings C specified in the tables must therefore be multiplied by the factor f.s .

technical illustration-R067312540-Super LB B, open, 25, with one seal
1) fs = factor
2) s = movement path

Definition of dynamic load ratings

Sealing

Super linear bushings come both with integrated and separate wiper seals. The separate wiper seals are specially designed for applications in high contamination environments. An additional seal (for example, bellows, extendable cover) is necessary for extremely high contamination environments. The open super linear bushings can also come fully sealed (with longitudinal seal), however this increases friction.

technical illustration-R067312540-Super LB B, open, 25, with one seal
technical illustration-R067312540-Super LB B, open, 25, with one seal

Dimensions

Ød

mm

12 16 20 25 30 40 50

D

mm

22 26 32 40 47 62 75

α

°

66 68 55 57 56 54

C

h13

mm

32 36 45 58 68 80 100

C1

H13

mm

22.6 24.6 31.2 43.7 51.7 60.3 77.3

C2

mm

1.3 1.6 1.85 2.15 2.65

E 1)

mm

6.5 9 11.5 14 19.5 22.5
1) Minimum size in relation to Ø d.

Life expectancy calculation

Radial clearance

The radial clearance values shown in the table have been determined from statistics and correspond to values expected in practice.

Adjusting radial clearance

The radial clearance of all Linear Bushings can be adjusted. If, for instance, a zero-clearance guideway is needed, the radial clearance of the Linear Bushing must be reduced using the adjusting screw on the housing (see also Linear Sets) until slight resistance occurs when rotating the shaft. Secure the adjusting screw for applications where vibrations are present.

Adjusting preload

For preloading, the aforementioned adjustment is made using an adjustment shaft that is weaker by the degree of preload.

Customer-built housings

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.

technical illustration-R067312540-Super LB B, open, 25, with one seal

Lubrication

Directives and standards

Notes