What are oil free bushings and what are their features?

Plain bearings where the body of the bushing is saturated with lubricant and can be used 'without oil' or 'with a reduced oil supply'. Oil free bushings have the following features: 1. Low maintenance frequency; 2. Suitable for low speed and heavy load situations, compared with ball linear bearings; 3. Can also be used under harsh conditions of high temperature and low temperature; 4. Thinner and space saving, compared with linear bearings; 5. Can be used for both linear and rotational motions.

What are the materials and features of MISUMI oil free bushings?

MISUMI oil free bushings are available in 5 types, i.e. copper alloy, bronze casting, dry, resin, and casting. Copper alloy (metal type), excellent resistance to high temperature, chemicals and shock, suitable for heavy duty and low speed operation. Bronze casting (metal type) with excellent sinter resistance, enabling slight movements, suitable for low load and high speed operation. Dry type (composite layer type), high temperature resistant, suitable for heavy duty and low speed operation, thin-walled and compact. Resin (resin type), high temperature and chemical resistant (tetrafluoroethylene resin), complying with food sanitation law, suitable for low load and low speed operation. Castings (metal type), suitable for medium load and low speed operation.

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E-MUCTZ20-50

type Inner Dia. d Outer Dia. D Overall Length L CAD Days to Ship

Specification/Dimensions

type
- E-MUCTZ
- E-MUCZ
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Inner Dia. d(Ø)
8

10

12

16

20

25

30

40
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Outer Dia. D(Ø)
12

14

18

22

28

33

38

50
Clear
Overall Length L(mm)
20

25

30

35

40

50

60

70

80
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

Same day
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Specify Alterations

Oil Free Bushings Flange Integrated Type Copper Alloy Center Flanged Type (E-MUCTZ20-50)

Volume Discount

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MiSUMi Economy

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Product Description

- Oil Free Bushings Flange Integrated Type Copper Alloy Center Flanged Type, E-MUCTZ / E-MUCZ from MISUMI.
- Recommended mating shaft for I.D. of Copper oil-free bushing are d8: General use (High Load), e7: General use (Light Load), f8: High precision use, g6: High precision use (Intermittent operation).
- The Copper oil-free bushing E-MUCTZ / E-MUCZ series is made of High tensile brass alloy with solid lubricant embedded.
- It is recommended to fix the bushing with anti-rotation screw.
- Accessories: Low head hexagon socket head screws 2 to 4 pcs.

Dimensional Drawing of Oil Free Bushings

Oil Free Bushings Flange Integrated Type Embedded Flanged Type Center Flanged Type: Related Images

Specification Table of Oil Free Bushings

Follow the selection procedure Oil Free Bushings

～

to select the type and parameters before ordering.

Part Number (Type of Oil Free Bushings·d)	-	L
E-MUCTZ	-	20

Part Number of Oil Free Bushings			L								D_h7		D_a	L₁	H	T	t	d₁	d₂	P.C.D.	F	A	Accessories Low head hexagon socket head screws (Economy series without fittings)
Type of Oil Free Bushings	d_F7		L								D_h7		D_a	L₁	H	T	t	d₁	d₂	P.C.D.	F	A
Center Flanged Type - H Type E-MUCTZ	8	+0.028 +0.013	20								12	0 -0.018	11.5	5	27	4	2.2	3.5	6	19	-	19	M3-10×2
	10	+0.028 +0.013		25							14		13.5	6	29	4	2.2	3.5	6	21		21	M3-10×2
	12	+0.034 +0.016		25							18		17.5		36	5	3	4.5	7.5	26		26	M4-12×2
	16	+0.034 +0.016			35	40					22	-0.021	21.5		40	5	3	4.5	7.5	30	18	24	M4-12×4
	20	+0.041 +0.020					50				28	-0.021	27.5	8	49	6	3.7	5.5	9	38	22	31	M5-16×4
	25							60			33	0 -0.025	32.5	8	54	6	3.7	5.5	9	43	25	35	M5-16×4
	30								70		38		37.5	10	63	8	4.2	6.6	11	50	30	40	M6-20×4
	40	+0.050 +0.025								80	50		49.5	13	82	10	5.2	9	14	66	38	54	M8-25×4

Part Number			L				D_h7		D_a	L₁	H	T	t	d₁	d₂	P.C.D.	F	A	Accessories Low head hexagon socket head screws (Economy series without fittings)
Type	d_F7
Center Flanged Type - Round Flanged E-MUCZ	16	+0.034 +0.016		30			22	0 -0.021	21.5	6	40	5	3	4.5	7.5	30	18	24	M4-12×4
	20	+0.041 +0.020			50		28		27.5	8	49	6	3.7	5.5	9	38	22	31	M5-16×4
	25					60	33	0 -0.025	32.5		54					43	25	35

[ ! ]Precautions for use of Oil Free Bushings
·Recommended matching shaft for I.D. F7 type　d8: General use (high load)　　　f8: High accuracy use　　　e7: General use (light load)　　　g6: High accuracy use (intermittent operation)
·It is recommended to fix the bushing with anti-rotation screw.

[ M ] Material of Oil Free Bushings: High strength brass alloy
Embedded solid lubricant
[ A ] Accessories: Low head hexagon socket head screws 2 to 4 pcs

Product Overview of Oil Free Bushings

1. This is an Oil Free Bushings bush based on high-strength brass.
2. Can withstand greater heavy loads than ball bearings.
3. It can be used in ‘high’ and ‘low temperature’ temperature conditions.
4. Compared to ball bearings, the bush thickness is thinner and saves space.
5. Applicable to linear motion and rotary motion.

Economical flange, integrated type, oil-free bushing, center round flange

Economical flange, integrated type, oil-free bushing, center round flange

Product Features of Oil Free Bushings

Feature 1: This product is a fusion of solid lubricant based on high-strength brass.
Feature 2: Best suited for use in medium load, low speed driving conditions.
Feature 3: It can demonstrate excellent wear resistance in areas where oil film formation is difficult, such as reciprocating motion and frequent starting and stopping.

■Precision positioning with 7 levels of inner diameter tolerance is more accurate
・Oil Free Bushings, Misumi economic type has the same inspection standards as MISUMI standard products, and quality inspection is performed before factory shipment to provide products suitable for users.

■Comparison of specifications (take straight type as an example)

Specification Overview of Oil Free Bushings

When assembling, be careful to remove foreign substances from the surface.
Applying lubricant to the grinding part before assembly can shorten the break-in period and is advantageous for machine operation.
During assembly, operate slowly and knocking is strictly prohibited to avoid damaging the bearing and causing deformation.

Use Cases of Oil Free Bushings

1. Fixing Device of Oil Free Bushings
Since it bears a load during fixing, it is relatively suitable to use an oil-free bushing. It withstands loads better than ball bearings.

Economic oil-free bushing copper alloy thrust type use case

2. Hinge Plate of Oil Free Bushings
Oil Free Bushings are used for rotation of hinge pins and hinge plates.Can be used simultaneously for linear motion mechanisms and rotary motion mechanisms.

Caution of Oil Free Bushings

Model selection and precautions for use of Oil Free Bushings

Combined design

MISUMI miniature ball bush units are recommended to use heat-treated shafts.
It is recommended to select the holder tolerance as H7 for Misumi miniature ball bushing units.

Shaft diameter tolerance		Holder diameter tolerance
Measurement	Measurement Tolerance	Holder Diameter	H7
2	0 -0.005	7∼10	+0.015 0
3
4		11∼14	+0.018 0
5
6		15∼18	+0.018 0
8
10		19∼24	+0.021 0
12

Machining heat treatment range of Oil Free Bushings

The shaft is heat-treated and then machined.Due to heat treatment, the hardness of the female screw machining part ± 10mm before and after may decrease (see example below).
In addition, the heat treatment area is not within the guaranteed range of the outer diameter dimensional tolerance.When calculating the stroke, subtract the dimensions of the heat treated part.

Economic type oil-free bushing copper alloy thrust type precautions

Lubrication of Oil Free Bushings

When shipping miniature ball bushings, anti-rust oil is applied. Please wash and dry them, then apply grease before use.
Depending on the usage environment, replenish lithium soap-based grease (such as Alubania Grease S2 made by Showa Shell Sekiyu) as needed.

Part Number

Incomplete part number.
Please use left hand selections to complete a part number.

: 30; 45; 60

Part Number
E-MUCTZ20-50

Part Number	Price	Minimum Order Qty.	Volume Discount	Days to Ship	RoHS	Inner Dia. d (Ø)	Outer Dia. D (Ø)	Overall Length L (mm)	Dimension H (mm)	Width Across Flats (mm)
	₹ 1,980.00	1 Piece(s)	Available	Same day	10	20	28	50	49	34

Brand Introduction

Since its establishment in 1963 in Japan, MISUMI Group Inc. has been providing customers with a wide range of high quality parts such as FA factory automation parts, mold parts, electronic parts, tools and consumables in a fast and accurate manner. We have created a low-cost business model by compiling our own catalogs and establishing a marketing system to sell our products directly, and we continue to develop MISUMI branded products with a high level of quality by developing an annual product plan based on customer feedback and requests. MISUMI has been established in China since June 2003 as MISUMI Precision Machinery Co., Ltd. and later changed its name to MISUMI (China) Precision Machinery Trading Co., Ltd., headquartered in Shanghai. Since the launch of the stamping mold standard parts business, we have started the official business of FA standard parts, plastic mold standard parts and machining tools, and achieved rapid development and growth of MISUMI business in China with support from our customers. China's manufacturing market is one of the most competitive in the world because of its unlimited prospects. Thus was born MISUMI's business philosophy - the key to the future of manufacturing in China is cost competitiveness as well as "quality" and "time".

Product Overview

1. Low maintenance frequency.
2. More resistant to heavy loads than rolling bearings.
3. Can be used under severe conditions of "high" and "low" temperatures.
4. Bushings are thin and space-saving, compared to rolling bearings.
5. Can be used for linear and rotary motions.

Product Photo

Product Features

Feature 1: A composite product based on high strength brass embedded with solid lubricant.
Feature 2: Ideal for use in heavy-duty and low-speed operating conditions.
Feature 3: Excellent wear resistance in areas where it is difficult to form an oil film, such as reciprocating movements and frequent starts and stops.

■I.D. tolerance precision class 7 ensures more accurate locating.
・Even for MISUMI economy series, the inspection standard is the same as that of MISUMI standard products, and factory inspection is carried out to provide users with products that meet the catalog specifications.

■Specification Comparison (Taking the straight type as an example)
・R chamfer, which facilitates installation
・The standard load and operating speed of the catalog are ensured, so it can be used with peace of mind.

*Products circulating on the market are similar products randomly purchased by our company from online or offline markets.

Specifications Overview

When assembling, check that there are no foreign objects on the surface.
The sliding surface may become black or grey-black after use due to the oil film formed by the solid lubricant. Do not scrub it and use as usual.
Before assembly, if the lubricant is applied to the grinding parts, it can shorten the running-in period and facilitate the operation of the machine.
When assembling, it should be pressed in slowly. Knocking is strictly prohibited to avoid damaging the bearings and causing deformation.

Example of Use

■Use of cylinders without locking and braking devices

Precautions

Basic Information

Type	Flange Integrated	Metal Type	High-Tensile Brass Alloy	Environment	Standard / In Oil
Mounting Shaft Fits	d8 / e7 / g6 / f8	Lubrication	Unlubricated / Regular Lubrication	Max. Allowable Surface Pressure P(N/mm²)	29
Maximum Allowable Velocity(m/s)	0.5	Max. Allowable PV Value Range(N/mm²•m/s)	1.1~2.0	Max. Allowable PV Value(N/mm²•m/s)	1.65
Operating Temperature Range(°C)	-40::150	Type	Center Flanged Type

Please check the type/dimensions/specifications of the part E-MUCTZ20-50 in the Oil Free Bushings Flange Integrated Type Copper Alloy Center Flanged Type series.

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

Question: What are oil free bushings and what are their features?: Answer: Plain bearings where the body of the bushing is saturated with lubricant and can be used "without oil" or "with a reduced oil supply". Oil free bushings have the following features: 1. Low maintenance frequency; 2. Suitable for low speed and heavy load situations, compared with ball linear bearings; 3. Can also be used under harsh conditions of high temperature and low temperature; 4. Thinner and space saving, compared with linear bearings; 5. Can be used for both linear and rotational motions.
Question: What are the materials and features of MISUMI oil free bushings?: Answer: MISUMI oil free bushings are available in 5 types, i.e. copper alloy, bronze casting, dry, resin, and casting.
Copper alloy (metal type), excellent resistance to high temperature, chemicals and shock, suitable for heavy duty and low speed operation.
Bronze casting (metal type) with excellent sinter resistance, enabling slight movements, suitable for low load and high speed operation.
Dry type (composite layer type), high temperature resistant, suitable for heavy duty and low speed operation, thin-walled and compact.
Resin (resin type), high temperature and chemical resistant (tetrafluoroethylene resin), complying with food sanitation law, suitable for low load and low speed operation.
Castings (metal type), suitable for medium load and low speed operation.

Product variants

Part Number
E-MUCTZ12-25
E-MUCTZ16-35
E-MUCTZ16-40
E-MUCTZ25-60
E-MUCTZ30-70
E-MUCTZ40-80

Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	RoHS	Inner Dia. d (Ø)	Outer Dia. D (Ø)	Overall Length L (mm)	Dimension H (mm)	Width Across Flats (mm)
₹ 1,405.80	1 Piece(s)	Available	Same day Stock	10	12	18	25	36	24
₹ 1,547.70	1 Piece(s)	Available	Same day Stock	10	16	22	35	40	28
₹ 1,689.60	1 Piece(s)	Available	Same day Stock	10	16	22	40	40	28
₹ 2,317.70	1 Piece(s)	Available	Same day Stock	10	25	33	60	54	39
₹ 2,699.40	1 Piece(s)	Available	Same day Stock	10	30	38	70	63	44
₹ 3,298.90	1 Piece(s)	Available	Same day Stock	10	40	50	80	82	56

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