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
If there are requirements for rust prevention, give priority to products with surface treatment of electroless nickel plating.
| Type |  Material |  Surface Treatment |  Hardness | ||
| p7 | m7 | h7 | |||
| E-JBHFPG | E-JBHFG | E-JBHG | Equivalent to 9CrWMn (Alloy Tool Steel or Bearing Steel) | - | 55HRC～ |
| E-JBHFMPG | E-JBHFMG | E-JBHMG | 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 |  P0.01mm increments |  L0.1mm increments | Wall Thickness(N) | H | T | |
 Type |  D | |||||
| (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 | ||
| 12 | 6.00~8.50 | 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 | ||||
| 25 | 13.00~15.50 | 4.75~6.00 | 30 | |||
| 26 | 15.00~16.50 | 4.75~5.50 | ||||
| 30 | 16.00~20.50 | 12.0~50.0 | 4.75~7.00 | 35 | 6 | |
| 35 | 20.00~25.00 | 5.00~7.50 | 40 | |||
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
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.
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
③Reference table for common dimensions without indicated tolerance (medium accuracy m) For details, click Table of Dimensions Without Indicated Tolerance
Dimensional Tolerance Fit Table②Change 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% |
Table of Dimensions Without Indicated ToleranceExample of Use
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 toExample Details
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 DetailsApplication Industries
| Lithium battery | Smart Phones | Electronic & Electrical | ||
 |  |  | ||
| Semiconductor | Medical | Food | ||
 |  |  |
Related Products
| 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 |
Related Documents
①Positioning technology reference information Click Positioning Technology
②Surface treatment related anti-rust ability salt spray test reference ClickAnti-rust Reference for Metal
Positioning Technology②Surface treatment related anti-rust ability salt spray test reference Click
Anti-rust Reference for Metal