Flanged Linear Bushings - Single, Opposite Counterbored Hole

Brand :

MISUMI

Caution

Delivery times for some of our products may be delayed as national government authorities have imposed limit of capacity at our production sites.

Product Description

Flanged Linear Bushings - Single, Opposite Counterbored Hole
The linear bushing supports and guides a load, enabling smooth and accurate linear motion along a specified path. It provides a variety of sizes to choose from.
[Feature]
● Support Shaft Diameter Minimum/Maximum (mm.): 3 and 50
● Overall Length Minimum/Maximum (mm.): 10 and 100
● Flange Shape : Round Flange, Square Flange and Compact Flange
● Material:
- Outer Cylinder - SUJ2 Equivalent or SUS440C Equivalent
- Ball - SUJ2 Equivalent or SUS440C Equivalent
[Application]
It is used in industrial machinery such as conveyor systems, packaging machines, and robotic equipment.

Dimensional Drawing

Round Flange

Square flange

Compact Flange

dr = 3 to 13

dr = 16 to 50

Product Specifications

Counterbored Holes	Type			Outer Cylinder			Balls	Retainer	Operating Ambient Temperature	[A] Accessory
Counterbored Holes	Round Flange	Square flange	Compact Flange	[M] Material	[H] Hardness	[S] Surface Treatment	[M] Material	[M] Material	Operating Ambient Temperature	[A] Accessory
Opposite Counterbored	LHZR	LHZS	LHZC	SUJ2 Equivalent	58HRC or more	—	SUJ2 Equivalent	Plastic (Duracon M90 Equivalent)	−20 to 80°C	Seal [M] Material Nitrile Rubber (－20 to 120°C)
Standard	LHFR	LHFS	LHFC
	LHFR−N No Seal	LHFS−N No Seal	LHFC−N No Seal
	LHFRF	LHFSF	LHFCF					Stainless Steel (SUS)	−20 to 110°C
	LHFRR	LHFSR	LHFCR			Low Temperature Black Chrome Plating	SUS440C Equivalent	Plastic (Duracon M90 Equivalent)	−20 to 80°C
	LHFRM	LHFSM	LHFCM			Electroless Nickel Plating
	LHFRM−N No Seal	LHFSM−N No Seal	LHFCM−N No Seal
	LHFRMF	LHFSMF	LHFCMF					Stainless Steel (SUS)	−20 to 110°C
	SLHFR	SLHFS	SLHFC	SUS440C Equivalent	56HRC or more	—		Plastic (Duracon M90 Equivalent)	−20 to 80°C
	SLHFRS	SLHFSS	SLHFCS	SUS440C Equivalent	56HRC or more	—		Stainless Steel (SUS)	−20 to 120°C

Specification Table

Part Number
LHFR8 LHFR−N10 LHFRR8 LHFRR10L	(No Seal) (Low Temperature Black Chrome Plating) (L Type Greased)	[ ! ] Alternative grease types available.

dr		D Tolerance			L		H	T	d	d₁	t	P.C.D.	W	F	A	Eccentricity (Max.) * 1	Balls Rows	Perpendicularity * 2	Basic Load Rating		Mass (g)
	Tolerance		Surface Treatment Not Provided	Surface Treatment Provided		Tolerance	H	T	d	d₁	t	P.C.D.	W	F	A	Eccentricity (Max.) * 1	Balls Rows	Perpendicularity * 2	C (Dynamic) N	Co (Static) N	Round Flange	Square flange	Compact Flange
3	0 −0.008	7	0 −0.011	0 −0.015	10	±0.3	19	3.5	2.5	4.5	2.1	13	15	—	13	0.008	4	0.008	69	105	7	5.1	6
4		8			12		20	3.5	2.5	4.5	2.1	14	16	—	14				88	127	8	6.2	7
5		10			15		25	5	3.5	6	3.1	17	20	—	17				167	206	17	13	14
6	0 −0.009	12	0 −0.013	0 −0.018	19		28					20	22	—	20	0.012		0.012	206	265	24	18	21
8		15	0 −0.013	0 −0.018	24		32					24	25	—	24				265	380	37	29	33
10		19	0 −0.016	0 −0.021	29		40	6	4.5	7.5	4.1	29	30	—	29				372	549	72	52	64
12		21			30		42					32	32	—	32				412	598	76	57	68
13		23			32		43					33	34	—	33				510	784	88	72	81
16		28			37		48					38	37	22	31				775	1180	120	104	112
20	0 −0.010	32	0 −0.019	0 −0.025	42		54	8	5.5	9	5.1	43	42	24	36	0.015	5	0.015	882	1370	180	145	167
25		40			59		62	8	5.5	9	5.1	51	50	32	40		6		980	1570	340	300	325
30		45			64		74	10	6.6	11	6.1	60	58	35	49				1570	2740	470	375	388
35	0 −0.012	52	0 −0.022	0 −0.030	70		82	10	6.6	11	6.1	67	64	38	55	0.020		0.020	1670	3140	650	560	575
40		60			80		96	13	9	14	8.1	78	75	45	64				2160	4020	1060	880	913
50		80			100		116	13	9	14	8.1	98	92	56	80				3820	7940	2200	2000	2037

* 1. The maximum amount of misalignment between the center point of the outer diameter D and the center point of the inner diameter dr.
* 2. Perpendicularity of D to flange mounting surface.
[ ! ] Anti-rust oil is applied at the time of delivery.
[ ! ] No seal supplied for dr = 3 or 4.
" ! " There are 2 engraving types for products without seals. Example: Part Number: For LHFR-N10, it will be either LHFR-N10 or LHFR10-N.

Grease coating
By selecting the grease below, change to the product with grease coating is available.

Type	Product Name	Main Features
A Type	Alvania Grease S2 (by Showa Shell Sekiyu)	General-purpose grease suitable for various grease lubrication locations.
Y Type	AFF (Made by THK Co., Ltd.)	Grease with less particles, stable rolling resistance, and excellent fretting resistance.
G Type	LG2 (Made by NSK Ltd.)	Grease with less particles, excellent wear and rust resistance.
L Type	ET-100K (Made by KYODO YUSHI Co., Ltd.)	Superior heat resistance and oxidation stability. Also high adhesion and cohesion with limited splash or leakage.
H Type	FGL (Lubriplate)	Suitable for lubrication of equipment used in food, beverage and pharmaceutical industries. (NSF H-1 Reg. No. 043534)

[ ! ] Grease coating cannot be selected for the Type without seal.

Grease Performance Table (Reference Value)

Item	Conditions	Unit	Measurement Method	A Type	Y Type	G Type	L Type	H Type
Thickener	—	—	—	Lithium Type	Lithium Type	Lithium Type	Aromatic Diurea	Aluminum Complex Soap
Base Oil	—	—	—	Mineral Oil	Fine Synthetic Oil	Mineral Oil + Synthetic Hydrocarbon Oil	Ether Synthetic Oil	USP White Oil
Base Oil Kinematic Viscosity	40°C	mm2/s	JIS K2220 23	131	100	32	—	105 (ASTMD-445)
Base Oil Kinematic Viscosity	100°C	mm2/s	JIS K2220 23	12.2	—	5.4	—	11.5 (ASTMD-445)
Worked Penetration	—	—	JIS K2220 7	283	315	199	280	310 (ASTMD-217)
Dropping Point	—	°C	JIS K2220 8	181	220	201	260 <	238 (ASTMD-217)
Evaporation Amount	99°C × 22 hr	wt%	JIS K2220 10	0.2	0.7	1.4	—	0.27 (ASTMD−972)
Oil Separation	100°C × 24 hr	wt%	JIS K2220 11	2.4	2.6	0.8	1.2	2.1 (ASTMD−1742)
Operating Temp.	In Air	°C	—	-25 to 120	-40 to 120	−20 to 70	−40 to 200	−12 to 177

Selection Supporting Information

Fitting of Shaft O.D. and Bushing I.D.

Fitting of Bushing O.D. and Housing I.D.

Reference: Tolerance range of MISUMI linear bushings I.D. and shaft O.D.

Reference: Tolerance range of linear bushings O.D. and housing diameter made by MISUMI


Dimensions (mm)	Linear Bushings Single Type (LMU) I.D. Tolerance				Shaft (SFJ) O.D. Tolerance (g6)
0	⌀3 to 5	⌀6 to 16	⌀20 to 30	⌀35 to 50
－0.001
－0.002					⌀3
－0.003
－0.004						⌀4 to 6
－0.005							⌀8 to 10
－0.006								⌀12 to 18
－0.007									⌀20 to 30
－0.008
－0.009										⌀35 to 50
－0.010
－0.011
－0.012
－0.013
－0.014
－0.015
－0.016
－0.017
－0.018
－0.019
－0.020
－0.021
－0.022
－0.023
－0.024
－0.025


	Product		Customer's design
I.D. dr	Outer Dia. D		Housing Dia.
I.D. dr		Tolerance		Tolerance H7
3	7	0 －0.009	7	+0.015 0
4	8		8
5	10		10
6	12	0 －0.011	12	+0.018 0
8	15	0 －0.011	15	+0.018 0
10	19	0 －0.013	19	+0.021 0
12	21		21
13	23		23
16	28		28
20	32	0 －0.016	32	+0.025 0
25	40		40
30	45		45
35	52	0 －0.019	52	+0.030 0
40	60		60
50	80		80

For MISUMI linear bushings, use in combination with MISUMI shafts (hardened with g6 tolerance) is recommended.

For MISUMI Linear Bushings, mounting Housing of H7 tolerance is recommended.
Bushing and Housing will be clearance fit.

Technical Information

■Calculation of Life

When the linear systems are in motion with loads, rolling surfaces and races are subject to repeated stress and will show stress-induced scaly damages called "flaking". The total run distance of a linear system until this flaking first appears is the life of a linear system.

Rated life can be calculated using the formula below from the basic dynamic load rating and the actual load applied to the linear bushings.

L = ( f_H· f_T· f_Cf_w· CP )³· 50

L: Rated Life (km)
C: Basic Dynamic Load Rating (N)
P: Applied Load (N)
f_w: Load Factor (Refer to Table-4)
f_H : Hardness Factor (Refer to Fig.-1)
f_T : Temperature Factor (Refer to Fig.-2)
f_C : Contact Factor (Refer to Table-3)

Hardness Factor (f_H)

Temperature Factor (f_T)

When using linear systems, ample hardness of the shafts in contact with balls is needed as well.
If the ample hardness of the shafts are not obtained, the allowable loads are reduced and the life will be shortened.

When linear systems are exposed to temperature higher than 100°C, hardness will be reduced, and allowable loads and life will be reduced.

Fig. 1. Hardness Factor

Fig. 2. Temperature Factor

Contact Factor (f_c)

Load Factor (f_w)

Generally, more than 2 linear systems are used for 1 shaft. In this case, the load applied to each linear system will vary depending on machining accuracies and will not be equally distributed. As the result, allowable load per linear system will vary depending on the number of linear systems used on one shaft.

To calculate the load applied to the linear systems, in addition to object weight, it requires inertia force attributed to motion velocity or moment loads. Furthermore, it is necessary to accurately determine the temporal change of each. However, in reciprocating motion applications, it is difficult to obtain accurate calculations due to the effects of vibrations and shocks, in addition to those of repeated starting and stopping motions. Therefore, use the Table below in order to simplify the Life Calculations.

Table-3. Contact Factor

Table-4. Load Factor

Number of bushings on one shaft	Contact Factor f_c
1	1.00
2	0.81
3	0.72
4	0.66
5	0.61

Conditions of Use	f_w
No external shocks or vibrations when running in low speed: 15 m/min. or less	1.0 to 1.5
No excessive external shocks or vibrations when running in medium speed: 60 m/min. or less	1.5 to 2.0
External shocks and vibrations given when running in high speed: 60 m/min. or more	2.0 to 3.5

Life in hours can be obtained by calculating travel distance per hour.
If the stroke length and number of strokes are constant, life in hours can be calculated using the following formula.

L_h = L· 10³2· ℓs· n₁· 60

L_h: Life Hours (hr), Ls: Stroke Length (m), L: Rated Life (km)
n₁: Reciprocating Cycles per Minute (cpm)

Cautions/Prohibitions

(1) When mounting Linear Bushings and Housings, use Retaining Rings (Snap Rings), Stoppers, etc.

■Mounting with Retaining Ring

■Mounting with Stoppers

(2) Linear Bushings are not suitable for rotating motion or usage with repetitive insertion and extraction of shafts. Forced use may cause damage.

Flanged Linear Bushing - Single, Opposite Counterbored Hole. (2) Linear Bushings are not suitable for rotating motion or usage with repetitive insertion and extraction of shafts. Forced use may cause damage.

(3) 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.

Flanged Linear Bushing - Single, Opposite Counterbored Hole. (3) 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.

(4) When assembling with linear shafts, forcing the shaft into the bushing with angular misalignment may cause the ball retainers to deform and balls to fall out. Be sure to align the centers and insert the shaft gently.