Linear Bushing - Standard, Double[RoHS Compliant]

 

Type Linear Bushings		Outer Cylinder			Balls	Retainer	Operating Ambient Temperature	[A] Accessory
		[M] Material	[M]Hardness	[S] Surface Treatment	[M] Material	[M] Material
Standard Specification	C-LMUW	SUJ2 Equivalent	58HRC or more	—	SUJ2 Equivalent	Plastic	－20 to 80°C	Seal [M] Material Nitrile Rubber
High Temperature Specifications	C-LMUWF−N					Stainless Steel	－20 to 120°C	—
	C-LMUWMF−N			Electroless Nickel Plating

[ ! ] No seal supplied for high temperature specifications (C-□□F-N).

	dr		D			L		B	W	D1	Eccentricity (Max.)	Balls Rows	Basic Load Rating		Allowable Static Moment (N⋅m)	Reference Mass (g)
			Surface Treatment	Surface Treatment									C (Dynamic) N	Co (Static) N
	Tolerance		Not Provided	Provided		Tolerance		Tolerance
			Tolerance	Tolerance
3	+0.003 -0.013	7	+0.006 -0.013	+0.006 -0.017	19	+0.3 -0.6	—	—	—	—	0.02	4	138	210	0.51	3.2
4		8			23								176	254	0.63	4.8
5		10			28		18.2	0  -0.4	1.1	9.6			263	412	1.38	11
6		12	+0.006 -0.015	+0.006 -0.020	35		24.8			11.5	0.03		324	529	2.18	16
8		15			45		32.8			14.3			431	784	4.31	31
10		19	+0.006 -0.018	+0.006 -0.023	55		41.4		1.3	18			588	1100	7.24	62
12		21			57		43.4			20			657	1200	10.9	80
13		23			61					22			813	1570	11.6	90
16		28			70		49.8		1.6	27		5	1230	2350	19.7	145
20	+0.003 -0.015	32	+0.006 -0.021	+0.006 -0.027	80		57.8			30.5	0.04		1400	2740	26.8	180
25		40			112	+0.3 -0.7	78.3	0  -0.5	1.85	38		6	1560	3140	43.4	440
30		45			123		85.3			43			2490	5490	82.8	480
35	+0.003 -0.018	52	+0.006 -0.024	+0.006 -0.032	135		94.8		2.1	49	0.05		2650	6270	110	795
40		60			151		116.8			57			3430	8040	147	1170
50		80			192		142.8		2.6	76.5			6080	15900	397	3100

kgf = N × 0.101972
[!] No seal supplied for dr = 3 or 4. No Seal Type has lower sliding resistance (0.4 to 1.2 N) and slides smoothly. Separate dust-proofing measures are necessary to keep the dust entering into sliding parts.
[ ! ] Spacers and Stoppers for Linear Bushings can be selected from here.
[ ! ] For shaft and housing tolerances, see "Recommended Tolerance of Shaft Diameter / Housing Diameter."

■Available Sizes of Linear Bushings

Specifications	Standard	High Temperature
Surface Treatment	Not Provided	Not Provided	Provided
dr	C-LMUW	C-LMUWF−N	C-LMUWMF−N
* 3	●
* 4	●
5	●	●	●
6	●	●	●
8	●	●	●
10	●	●	●
12	●	●	●
13	●	●	●
16	●	●	●
20	●	●	●
25	●	●	●
30	●	●	●
* 35	●
* 40	●
* 50	●

[ ! ] No seal supplied for dr dimension of C-LMUW = 3 or 4.
[ ! ] Only C-LMUW can be selected for dr dimension = 3 or 4.
[ ! ] C-□□□-N cannot be selected for dr* dimension.

■Recommended Tolerance of Shaft Diameter / Housing Diameter of Linear Bushings

dr	Shaft Dia.	Housing Dia.
	g6 Tolerance		Tolerance
3	−0.002 −0.008	7	+0.021 +0.006
4	−0.004 −0.012	8
5		10
6		12	+0.024 +0.006
8	−0.005 −0.014	15
10		19	+0.027 +0.006
12	−0.006 −0.017	21
13		23
16		28
20	−0.007 −0.020	32	+0.031 +0.006
25		40
30		45
35	−0.009 −0.025	52	+0.036 +0.006
40		60
50		80

■Regular Maintenance of Linear Bushings
(1) For grease lubrication, apply grease to the ball rows within the linear bushings before use, then periodically apply grease during the use.
The grease has an effect of reducing friction by forming a layer between the balls and shaft rolling surfaces, preventing seizures.
Grease loss and deterioration will cause shorter life of linear guides.
(2) Recommended Grease: Lithium soap based grease
(3) Recommended Lubrication Intervals: Every 6 month
Recommended lubrication is that every 3 months when travel distance is extensive, or every 1000 km when travel distance exceeds 1000 km within the period.
(4) If large moment load (offset load) is to be applied, Short / Single Type Linear Bushings are not suitable.
Use of Double Type or Multiple Linear Bushings is recommended.

■Dust-Proofing Measures of Linear Bushings
Please be aware that if foreign objects or dusts get inside the linear bushing, it will interfere with the circulation of the steel balls and cause failures.
Please attach a dust cover or protection cover for harsh usage environments.

■Use of a hardened shaft with g6 tolerance is recommended for MISUMI Linear Bushings.

▲Example of use in conveyor transfer with air cylinder