BOSCH REXROTH
R060202530

$330.14 USD

BOSCH REXROTH
Material:R060202530
Model:KBM-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 STD.LINEAR BUSHING KBM-25-DD-NR (R060202530) is a premium-grade standard linear bushing designed for precision movement and durability in challenging environments. This robust component features a closed design with a shaft diameter of 25mm, ensuring compatibility with self-supporting shafts. The KBM-25-DD-NR is equipped with two seals that provide enhanced protection against contaminants, making it suitable for use in harsh conditions such as woodworking, foundries, and cement plants. This linear bushing boasts a rugged all-metal design with a steel ball retainer that can withstand heavy contamination and demanding operational requirements. The corrosion-resistant construction includes many pockets acting as lubricant reservoirs to facilitate extended lubrication intervals or even lubrication for life, which significantly reduces maintenance needs. Additionally, optional integrated wiper seals are available to further prevent dirt ingress and protect the internal components of the bushing. Constructed from high-quality stainless steel materials comparable to industry standards, the outer sleeve, ball retainer, balls, and integrated retaining rings of the KBM-25-DD-NR are engineered for longevity and consistent performance. The product's design allows it to handle dynamic load capacities effectively while maintaining low friction coefficients under various loads thanks to its well-lubricated stainless steel balls. Weighing in at 0.3 kg, this linear bushing is not only robust but also lightweight enough for easy installation without compromising on strength or load-bearing capabilities. With its ability to operate within a permissible ambient temperature range of -30°C to +80°C (without wiper seals), the Bosch Rexroth STD.LINEAR BUSHING KBM-25-DD-NR provides reliable operation in diverse temperature conditions while offering exceptional performance characteristics essential for precision linear motion applications.

Standard LB, closed, 25, with two seals

"Standard linear bushing
Standard (metal)
Closed
Shaft diameter d = 25
With two seals
Design: corrosion-resistant"

Unpacked Weight: 0.234 kg

Rugged all-metal design with steel ball retainer for harsh environments and heavy contamination
Many pockets acting as lubricant reservoirs for extended lubrication intervals or lubrication for life
Optional integrated wiper seals
Stainless steel for the medical, chemistry and food industries
Closed, for self-supporting shafts
For use in woodworking, foundries, cement plants
Pockets collect any dirt that may have worked its way in to prevent the linear bushing from jamming.
Balls made of stainless steel comparable to 1.4125
Hardened and machined outer sleeve made of stainless steel comparable to 1.4125
Ball retainer made of stainless steel comparable to 1.4301
Integrated retaining rings made of stainless steel comparable to 1.4006 or wiper seals

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Rows of balls	6
Footnote shaft radial clearance h6	Determined from working bore diameter and shaft tolerance statistics. Recommended housing bore tolerance: H6 or H7.
Series	Standard (metal)
Footnote friction force FR	One wiper seal: Multiply value with factor 0.5
Size C1 H13	43.7
Maximum dynamic load capacity Cmax	830
Footnote permissible ambient temperature (min ... max)	Higher temperatures are only admissible at linear bushings without wiper seals with ball retainers made of steel. Make allowance for reductions in load capacity.
Max. acceleration amax	100
Footnote friction coefficient μ	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.
Permissible ambient temperature	-10 °C ... +80 °C
Outer diameter D	40
Breakaway force	14
Maximum permissible linear speed vmax	2.5
Size D	40
Size D1	37.5
Friction coefficient μ	0,001 ... 0,004
Size C h12	58
Size C2	1.85
Friction coefficient μ max.	0.004
Friction force	5
Footnote minimum dynamic load capacity Cmin	The 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 Cmax	The 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 ID	17
Permissible ambient temperature (max)	+80
Permissible ambient temperature (min)	-10
Friction force FR footnote 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.
Footnote breakaway force	One wiper seal: Multiply value with factor 0.5
Minimum static load capacity C0min	1620
Maximum static load capacity C0max	2100
Minimum dynamic load capacity Cmin	780
Shaft diameter d	25
Linear guide type	Linear bushing and shaft
Filter for linear bushings and shafts	Linear bushings
Format of linear bushings	– Closed
Footnote minimum static load capacity C0min
Footnote maximum static load capacity C0max
Weight	0.234
Size D1 with tolerance	37.5 mm

General technical data

Ø d	mm	3	4	5	8	10	12	16	20	25	30	40
amax	m/s²	100
vmax	m/s	2.5
m	kg	0.001	0.002	0.011	0.022	0.036	0.045	0.06	0.1	0.235	0.36	0.77
FR	N	-		0.4 1) 2)	0.5 1) 2)	1 1) 2)	2 1) 2)	3 1) 2)	4 1) 2)	5 1) 2)	6 1) 2)	8 1) 2)
Breakaway force	N	-		0.8 1)	1 1)	2 1)	6 1)	9 1)	12 1)	14 1)	18 1)	24 1)
μ 3)		0.001 ... 0.004
Rows of balls		4							5	6
Working bore diameter tolerance	µm	+ 8 0		+ 11 + 1	+ 12 + 2	+ 8 0	+ 12 + 2	+ 14 + 2		+ 16 + 2		+ 19 + 2
Shaft radial clearance h6 4)	µm	+ 12 + 2	+ 14 + 2	+ 16 + 4	+ 18 + 5		+ 20 + 5	+ 22 + 5	+ 23 + 6	+ 25 + 6		+ 30 + 7
Operating conditions
Permissible ambient temperature (min ... max) 5)		-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.
4)	Determined from working bore diameter and shaft tolerance statistics. Recommended housing bore tolerance: H6 or H7.
5)	Only unsealed Linear Bushings with steel ball retainers may be used at higher temperatures. Make allowance for reductions in load capacity.

Load capacities and load moments

Ød	mm	3	4	5	8	10	12	16	20	25	30	40
Cmin	N	55	70	160	210	300	400	460	680	780	1250	1720
Cmax	N	65	80	185	240	350	460	530	800	830	1320	1820
C0min	N	45	60	180	235	260	420	440	860	1620	2000	3300
C0max	N	65	85	250	330	370	600	630	1250	2100	2500	4200

	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

Impact of load direction on load rating of closed Linear Bushings

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-R060202530-Standard LB, closed, 25, with two seals

Definition of dynamic load ratings

Installation dimensions/interchangeability

Standard Linear Bushings have the same installation dimensions as super Linear Bushings. They are interchangeable, differ however in terms of securing, radial clearance, load ratings and lubrication.

Sealing

Standard Linear Bushings come with a wiper seal with shaft diameters of 5 and higher. Open standard Linear Bushings with shaft diameters 20 to 80 can also come fully sealed (with longitudinal seal; increased friction).

Dimensions

Ød		mm	3	4	5	8	10	12	16	20	25	30	40
D		mm	7	8	12	16	19	22	26	32	40	47	62
C	h12	mm	10	12	22	25	29	32	36	45	58	68	80
C1	H13	mm	-		14.2	16.2	21.6	22.6	24.6	31.2	43.7	51.7	60.3
C2		mm	-		1.1		1.3			1.6	1.85		2.15
D1		mm	-		11.5	15.2	18	21	24.9	30.3	37.5	44.5	59

Life expectancy calculation

General mounting instructions

Customer-built housings

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.