Bushings for Locating Pins Shouldered, Retaining

Brand :

MISUMI

Caution

Product Description

Product Overview

The fixture bushing is a mechanical positioning part that is used in conjunction with a positioning pin to achieve a guiding effect, in which the shouldered falloff prevention type can effectively prevent falloff and control mounting position. And it can effectively prevent the rapid wear of the workpiece.

Dimensional Drawing

The p7 type has a larger inner diameter shrinkage rate compared to the m7 type, so be careful when machining holes. (See Precautions for the inner diameter change after press-fit)

The I.D. tolerance of bushing is high. If a vernier caliper is used for detection, the measurement result will be too small. It is recommended to use a high-precision measuring tool (internal micrometer or plug gauge, etc.) for detection.

Specifications Overview

■Material Specification Table

Type			Material	Surface Treatment	Hardness
p7	m7	h7	Material	Surface Treatment	Hardness
E-JBHFPG	E-JBHFG	E-JBHG	Equivalent to 9CrWMn (Alloy Tool Steel or Bearing Steel)	-	55HRC～
E-JBHFMPG	E-JBHFMG	E-JBHMG	Equivalent to 9CrWMn (Alloy Tool Steel or Bearing Steel)	Electroless Nickel Plating	55HRC～
E-JBHFCPG	E-JBHFCG	-	Martensitic stainless steel	-	45HRC～

If there are requirements for rust prevention, give priority to products with surface treatment of electroless nickel plating.

Specification Table

Part Number		P 0.01mm increments	L 0.1mm increments	Wall Thickness(N)	H	T
Type	D	P 0.01mm increments	L 0.1mm increments	Wall Thickness(N)	H	T
(p7) E-JBHFPG E-JBHFMPG E-JBHFCPG (m7) E-JBHFG E-JBHFMG E-JBHFCG (h7) E-JBHG E-JBHMG	8	4.00~4.50	8.0~10.0	1.75~2.50	12	3
	10	4.00~6.50	8.0~15.0	1.75~3.00	14	3
	12	6.00~8.50	8.0~15.0	1.75~3.00	16	4
	15	8.00~10.50	10.0~35.0	2.25~3.50	19
	18	10.00~12.50		2.75~4.00	22
	20	12.00~13.50		3.25~4.00	26	5
	22	12.00~13.50		4.25~5.00	26
	25	13.00~15.50		4.75~6.00	30
	26	15.00~16.50		4.75~5.50	30
	30	16.00~20.50	12.0~50.0	4.75~7.00	35	6
	35	20.00~25.00	12.0~50.0	5.00~7.50	40	6

L+T≤P×3.0

D	p7	m7	h7
8	+0.030 +0.015	+0.021 +0.006	0 -0.015
10
12	+0.036 +0.018	+0.025 +0.007	0 -0.018
15
18
20	+0.043 +0.022	+0.029 +0.008	0 -0.021
22
25
26
30
35	+0.051 +0.026	+0.034 +0.009	0 -0.025

Product Features

Features and usage outline of fixture bushing product Jig Bushings Shoulder Standard

Feature 1: fixture bushing, shouldered falloff prevention type, can be fixed by bolts laterally to effectively prevent falloff.
Feature 2: electroless nickel plated and austenitic stainless steel types can effectively prevent rust.
Feature 3: Optional material: iron (alloy tool steel or bearing steel); austenitic stainless steel (martensitic stainless steel).
Feature 4: press-fit installation, the tolerance of the O.D. press-fit dimension can be specified: p7, m7.

Precautions

①Dimensional tolerance and fit parameter table For details, click

Dimensional Tolerance Fit Table
②Change in inner diameter of the fixture bushing during press-fit
■Change in inner diameter of the fixture bushing during press-fit
The fixture bushing shrinks when press-fitted.
The shrinkage rate varies depending on material of mounting part and D dimension tolerance of bushing.

【Example of Shrinkage during Press-Fit】

①Before press-fit

②After press-fit

βDimension (when mounting hole is H7)

	D Dimension Tolerance
Mounting Material	m7	p7
Steel	αX99.93%	αX99.90%
Aluminum Alloy	αX99.96%	αX99.93%

③Reference table for common dimensions without indicated tolerance (medium accuracy m) For details, click

Table of Dimensions Without Indicated Tolerance

Example of Use

Example of using bushing for positioning pin and example of fixture

Example introduction: shouldered bushing for positioning pin in pick and place mechanism
Design summary:
①An example of using a swing cylinder to achieve linear and rotary motion through pneumatic drive, and moving a small substrate through a suction cup.
②In the case of a long pin, if the air vent is not provided, the pin and bushing are not easy to pull out. It is necessary to provide a air vent on the bushing side or the positioning pin side.
Intended use of fixture bushing:
The axial structure of the swing cylinder can ensure positioning accuracy while saving space through the coordination of positioning pins/shouldered bushings.

For more information, please refer to

Example Details

Application Industries

Lithium battery	Smart Phones	Electronic & Electrical

Semiconductor	Medical	Food

Locating Pins Large Head, Tapered, Press Fit, Standard	Fixture Bushings Straight, Standard	Small Diameter Locating Pins Straight

Representative model: E-JPBB6-10	Recommended model: E-JBA12-10	Recommended model: E-SPKS-D1-L5
Advantages: suitable for various working conditions, widely used	Advantages: easy to install, rich in specifications	Advantages: suitable for use in confined space