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BOSCH REXROTH
R065822530


$98.65 USD
  • BOSCH REXROTH
  • Material:R065822530
  • Model:KBC-25-DD-NR

Quantity in stock: 0

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***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 COMPACT LIN. BUSH. KBC-25-DD-NR (R065822530) is a high-performance linear bushing designed for general requirements with a compact construction that ensures small outer dimensions while offering a high dynamic load rating and long service life. This model features shaft diameter d, is equipped with two seals for protection, and boasts normal radial clearance in its corrosion-resistant version. The bushing is not greased, supporting low maintenance needs. Specifically engineered for applications requiring smooth linear motion, the KBC-25-DD-NR is characterized by its segmental loadbearing plates made from stainless steel, which are hardened to conform to the balls in the running track—making it suitable for environments such as medical, chemistry, and food industries where corrosion resistance is crucial. The linear bushing integrates wiper seals that serve to collect any contaminants and prevent jamming of the mechanism. Installation of this bushing is straightforward; it simply presses into place without the need for additional retention due to its integrated metal retainer that is approximately 0.5 mm larger than the outer diameter of shaft diameters ranging from 3 to 50 mm, ensuring a secure fit in the housing bore. The design includes multiple lubricant reservoirs which allow for extended lubrication intervals or even lifetime lubrication. The KBC-25-DD-NR supports high travel speeds up to n ms and operates within an ambient temperature range of -30°C to +80°C. It has a breakaway force of 0.5 N and can handle maximum dynamic loads efficiently with its robust construction, while also maintaining low friction coefficients between 0.01 and 0.25 depending on operating conditions. With a weight of just 0.02 kg, this linear bushing combines lightweight design with durability and performance, making it an ideal choice for various linear motion applications where space-saving installation and reliable operation are essential.


Compact LB, 25, with two seals, CR, not lubricated

Compact linear bushing
Shaft diameter d = 25
With two seals
Radial clearance: Normal
Version: Corrosion-resistant
Not greased

Unpacked Weight: 0.0622 kg
Low-cost linear bushing for general requirements
Small outer dimensions and highly compact construction
High dynamic load rating and long service life due to hardened segmental load-bearing plates with ball conformity in the running track
Stainless steel for the medical, chemistry and food industries: Segmental load bearing plates comprising 1.4037 balls made from 1.3541
Integrated wiper seals, external seals or no wiper seals
Normal radial clearance
Not greased
High travel speed (5 m/s)
Simple mounting: Just press on – no additional retention needed
Many pockets acting as lubricant reservoirs for extended lubrication intervals or lubrication for life
Pockets collect any dirt that may have worked its way in to prevent the linear bushing from jamming.
Integrated metal retainer about 0.1 mm larger than outer diameter (shaft diameters 12 to 50) for secure fit in housing bore
Rows of balls6
SeriesCompact
Footnote friction force FROne wiper seal: Multiply value with factor 0.5
Maximum dynamic load capacity Cmax2050
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
Outer diameter D35
Breakaway force4.5
Maximum permissible linear speed vmax5
Size D35
Length of linear bushing40
Friction coefficient μ0,001 ... 0,004
Friction coefficient μ max.0.004
Friction force2
Footnote minimum dynamic load capacity CminThe dynamic load capacities are based on a total travel of 100,000 m. When based on 50,000 m, the C values in the table are to be multiplied by 1.26.
Friction coefficient μ min.0.001
Footnote maximum dynamic load capacity CmaxThe dynamic load capacities are based on a total travel of 100,000 m. When based on 50,000 m, the C values in the table are to be multiplied by 1.26.
Productgroup ID17
Permissible ambient temperature (max)+80
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
Minimum static load capacity C0min1050
Maximum static load capacity C0max1560
Minimum dynamic load capacity Cmin1630
Shaft diameter d25
Linear guide typeLinear bushing and shaft
Format of linear bushings– Closed
Filter for linear bushings and shaftsLinear bushings
Footnote minimum static load capacity C0min
Footnote maximum static load capacity C0max
Weight0.0622
Size D1 with tolerance
Size C40
Radial clearance shaft/bore h6/H7+36,0

General technical data

Ø d

mm

8 10 12 14 16 20 25 30 40 50

amax

m/s²

150

vmax

m/s

5

m

kg

0.011 0.014 0.016 0.018 0.025 0.028 0.058 0.08 0.14 0.17

FR 1) 2)

N

0.4 0.5 0.8 0.9 1 1.5 2 2.5 3 4

Breakaway force 1)

N

0.8 1 1.5 1.8 2 3 4.5 6 8 10

μ 3)

0.001 ... 0.004

Rows of balls

4 5 6

Shaft radial clearance h6/bore H7

µm

+ 25
+ 2
+ 32
0
+ 33
- 1
+ 36
0
+ 42
- 1

Operating conditions

Permissible ambient temperature (min ... max)

-10 °C ... +80 °C
1) One wiper seal: Multiply by a factor of 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.
3) 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

8 10 12 14 16 20 25 30 40 50

Cmin

N

350 420 510 530 660 780 1630 2140 3520 3970

Cmax

N

410 500 610 630 780 990 2050 2700 4470 5030

C0min

N

280 330 340 400 480 1050 1510 2510 2890

C0max

N

400 480 500 580 720 1560 2230 3720 4280
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

Cmax

Maximum dynamic load rating

N

Cmin

Minimum dynamic load rating

N

C0max

Maximum static load rating

N

C0min

Minimum static load rating

N

FR

Friction force

N

m

Mass

kg

vmax

Maximum permissible speed

m/s

μ

Friction coefficient

Effect of load direction on load rating

The listed load ratings should be chosen depending on installation in minimum or maximum position and should be based on the calculations. If the load direction is clearly defined and the Linear Bushings can be installed in maximum position, the load ratings Cmax. (dynamic load rating) and C0 max (static load rating) can be used. If aligned installation is not possible or the load direction is not defined, the minimum load ratings must be used.

 

technical illustration-R065822530-Compact LB, 25, with two seals, CR, not lubricated

Reduced load capacity with short stroke

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

technical illustration-R065822530-Compact LB, 25, with two seals, CR, not lubricated
1) fs = factor
2) s = stroke

Definition of dynamic load ratings

Sealing

The sealed version contains integrated wiper seals.

Separate wiper seals are also available (no securing necessary).

technical illustration-R065822530-Compact LB, 25, with two seals, CR, not lubricated

Dimensions

Ød

mm

8 10 12 14 16 20 25 30 40 50

D

mm

15 17 19 21 24 28 35 40 52 62

C

24 mm ±0.2 26 mm ±0.2 28 mm ±0.2 30 mm ±0.2 40 mm ±0.2 50 mm ±0.2 60 mm ±0.2 70 mm ±0.2

Life expectancy calculation

Installation

Install the Linear Bushings using an arbor press (see "Notes for mounting" below). If Linear Bushings are slightly skewed when initially installed into the housing bore, they will align themselves as they are pressed in. The Linear Bushing does not have to be removed and realigned.

Retention

Shaft diameter 8 and 10: The plastic outer sleeve is oversized. Additional retention is required for vibrations or high acceleration. Starting from shaft diameter 12: The outer diameter of the metal holding ring is oversized. No additional retention needed (bore length ≥  C).

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-R065822530-Compact LB, 25, with two seals, CR, not lubricated

Lubrication

Directives and standards

Notes