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inCAD Library

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  • Helpful application examples for mechanical engineers.

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  • Online application library with a range of ideas for all manufacturing industries.
  • Save design time and learn new design applications when you are concepting new machines.

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No.000137 Adjustable Height Clamping Mechanism

Simple height adjustment by manual operation

Oil Free Bushing

Product name Oil Free Bushings I.D. F7 - Copper Alloy
Part number MPBZ12-12
Features The most standard type in the Copper Alloy series.
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Suitable for Sliding Bearing of shaft loading / unloading.

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Available sizes

■Oil Free Bushings I.D. F7 - Copper Alloy

Material: High Tensile Brass Alloy, Solid Lubricant Embedded

I.D. O.D. Length Rotation Stopper
Screw
φ5 φ9 8 9 10 12 15 M4×8
φ6 φ10 8 9 10 12 15 16 19 20
φ8 φ12 8 9 10 12 15 16 19 20 25
φ10 φ14 8 9 10 12 15 16 19 20 25 30
φ12 φ18 8 9 10 12 15 16 19 20 25 30 35
φ13 φ19 9 10 12 15 16 19 20 25 30 35
φ15 φ21 9 10 12 15 16 19 20 25 30 35 40
φ16 φ22 9 10 12 15 16 19 20 25 30 35 40
φ18 φ24 9 10 12 15 16 19 20 25 30 35 40 M5×8

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Accuracy Info.

■Accuracy of Oil Free Bushing Copper Alloy Straight, Standard I.D. F7 O.D. m6

I.D. Tolerance: F7

Recommended Mating Shaft
d8: General Use (High-Load)
f8: High Precision Use
e7: General Use (Light Load)
g6: High Precision Use (Intermittent Operation)

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Performance info.

■Load information of oil free bushing copper alloy type

Regular Non-lubricated
Maximum Allowable Load 29N/mm2
Maximum Allowable Velocity 60m/min 30m/min
Maximum Allowable PV Value 1990kgf/cm2・m/min 1010kgf/cm2・m/min

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IDEA NOTE The clamping height can be easily changed by manual operation.

The tapered portion of the horizontal pin that is arranged perpendicular to the vertical shaft is fit in any one of the grooves at different heights provided on the vertical shaft, so as to securely fix the shaft.

IDEA NOTE A spring guide is arranged beside the spring.

To prevent the spring force from directly exerting on the oil free bushing, a spring guide is installed.

  • Terms of Use for CAD Data and Simplified Drawing Data
    These terms and conditions (hereinafter referred to as “the Terms") set forth the conditions for downloading CAD data and simplified drawing data posted on https://mx.misumi-ec.com/ (hereinafter referred to as the "Website") operated by MISUMI MÉXICO, S. DE R.L. DE C.V. (hereinafter referred to as "MISUMI"). By downloading CAD data and simplified drawing data posted on the Website (hereafter referred to as “Data”), customers are deemed to have agreed to these Terms.

    1. Purpose of Use
    MISUMI offers the following:
    1) CAD data found on the Website (3D CAD data, 3D Intermediate data and 2D CAD data) for the purpose of informing customers of the characteristics of the products offered by MISUMI or a manufacturer affiliated with MISUMI for use in their designs.
    2) Simplified drawing data (in PDF format) for the purpose of checking the specifications of products.
    2. Characteristics of Data
    There may be a discrepancy in certain characteristics of products (for example: tolerance, surface roughness, chamfer, etc.) between the Data and the actual product. Furthermore, for the purpose of reducing the file size of the Data, some information such as oil groove shapes, threads, or spring shapes, may be removed from the Data.
    3. Disclaimer
    MISUMI carefully creates the Data but makes no warranty as to the accuracy of the Data. MISUMI may at any time, and with no prior notice to customers, revise or delete Data. MISUMI assumes no responsibility for any damage or loss resulting from any revision or deletion of the Data, or any errors in said data. Customers are solely responsible for all aspects of their own designs, including those made using MISUMI’s CAD data. MISUMI may provide customers with design example data on the Website, but the quality, accuracy, functionality, safety, reliability, etc., of such data are not guaranteed. MISUMI may, at any time, and in its sole discretion, request that the customer cease its use of or destroy the Data in its possession. MISUMI may request the customer provide MISUMI documentation of such destruction.
    4. Prohibited Acts
    Customers or users of the Data, are prohibited from the following acts regarding the Data, in whole or in part:
    (1) Requesting quotations or placing orders for products with third parties other than those authorized by MISUMI or its affiliates;
    (2) Receiving quotations or orders for products from third parties by providing the Data to a third party or using the Data in their own business;
    (3) Displaying links to the Website related to the Data on their own websites, etc., without MISUMI's consent;
    (4) Using or reproducing the Data beyond the scope of the above-stated Purpose of Use;
    (5) Modifying, altering, tampering with, translating, or adapting the Data;
    (6) Selling, transferring, lending, sublicensing, or providing the Data to third parties in any way without MISUMI’s consent;
    (7) Altering the content, reverse engineering, decompiling, disassembling, or analyzing the Data;
    (8) Publicly disclosing or exhibiting the Data without MISUMI's consent;
    (9) Using the Data for the purpose of providing products and services identical or similar to those of MISUMI;
    (10) Performing acts that interfere with the proper functioning of this Website, such as acquiring Data in bulk.
    5. Copyright
    All title and copyright in and to any information contained in the Data are owned by MISUMI or the relevant manufacturer affiliated with MISUMI and are protected by applicable copyright laws and international treaties. By downloading Data, the customer acquires no ownership rights of any kind in the intellectual property contained within. Without prior approval from MISUMI, no part of the Data may be utilized (reproduced, modified, reverse-engineered, uploaded, presented, sent, distributed, licensed, sold, or published) for any purpose other than that mentioned above.
    In the event Data is found to have been to be used for any purpose other than that mentioned above or against any applicable laws, MISUMI may pursue any legal remedy available to it, which may result in forbidding the offending user from using the Data or accessing the Website.
    6. Third-Party Data
    MISUMI offers some Data provided by third parties. Such Data may be subject to separate terms and conditions, in addition to these terms. MISUMI makes no guarantee or warranty regarding Data from third parties.
    7.Export Control
    Customers shall comply with all applicable laws and regulations regarding the export of the Data.
    8. Amendments to the Terms
    MISUMI may, at any time, and in its sole discretion, modify these terms and conditions; any such modification will be effective immediately.
    9. Severability
    If any term or provision of these Terms is invalid, illegal, or unenforceable in any jurisdiction, such invalidity, illegality, or unenforceability shall not affect any other term or provision of these Terms or invalidate or render unenforceable such term or provision in any other jurisdiction.
    10. Miscellaneous
    These Terms and any disputes arising in connection therewith shall be exclusively governed by and construed in accordance with the laws of the United Mexican States, without regard to its conflicts of law principles. The state and federal courts located in Queretaro, Mexico shall have exclusive jurisdiction to adjudicate any dispute arising in connection with these Terms. By downloading the Data, you agree to submit to the exclusive and personal jurisdiction of the state and federal courts located in Queretaro, Mexico.

    Revised: 27/10/2025

    CAD Download (Unit Assembly)

    CAD Download: File Format
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    Thank you for downloading the data.

    Click the Good IDEA! button when you find interesting design tips.


    This data is utilized in order to list more useful application examples in the future.

    CAD Data Limitations

    1. Assembly data shows the assembly drawings in the concept design phase. The sole purpose of the data is to explain the structure and functionality of the assembly and is not considered nor to be used as a final design.
      You will need to edit the Data so that it meets your specific design conditions.
    2. Unit assembly Data consists of some sub-assemblies.
      It is configured so that each sub-assembly unit can be used as it is or edited.
    3. * The part in the frame is a sub-assembly unit.

    4. The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
    5. The Data including the third-part components are made by the Company.

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  • * Unit assembly Data consists of some sub-assemblies.
       It is configured so that each sub-assembly unit can be used as it is or edited.

Application Overview

Purpose

  • Height adjustment to clamp workpiece according to its height.
  • There are three shafts in this system. Two of the vertical shafts are parallel to each other. One of the shaft acts as a linear guide, and the other shaft is tapered to fit onto a perpendicular horizontal third shaft. The third shaft perpendicular to the two parallel shafts will be spring loaded and can be position back and forth to lock and unlock the vertical tapered shaft. With this mechanism, we would have the flexibility to adjust the height of the clamp and secure position.

Target workpiece

  • The height of resin parts differs depending on the model.
  • Size (1): W80 x D90 x H67mm
    Size (2): W80 x D90 x H45mm
    Size (3): W80 x D90 x H30mm
  • Weight (1): 170g
    Weight (2): 110g
    Weight (3): 70g

Design Specifications

Operating Conditions or Design Requirements

  • Different heights: 3 positions
    Height (1): H67mm
    Height (2): H45mm
    Height (3): H30mm
  • Outer dimensions: W177 x D170 x H170mm

Required Performance

  • Positioning accuracy: ±0.3mm

Selection Criteria for Main Components

  • Oil free bushings within the allowable load range of the vertical shaft of the tapered portion are selected.

Design Evaluation

Verification of main components

  • Confirmation that the force applied to the oil free bushings is within the allowable range
    • Conditional value: taper angle of horizontal pin: θ=5°, vertical shaft diameter = oil free bushing inner diameter: d=8mm, oil free bushing length: L=10mm, spring coefficient of the spring:k=0.3N/mm, spring free length: Lf=30mm, spring length when shaft is fixed:Ls=26mm.
    • Force applied to horizontal pin by spring when shaft is fixed:F=(Lf-Ls)×k=(30-26)×0.3=1.2N.
    • Force at which tapered portion of horizontal pin presses shaft in lateral direction: W=F/tanθ=1.2/tan5°=13.7N
    • Force in radial direction applied to oil free bushings:P=W/(d×L)=13.7/(8×10)=0.17N/mm ²
    • As two oil free bushings are arranged, the force applied to one bushing: P'=P/2=0.085N/mm ²
    • As allowable maximum load on oil free bushing, copper-alloy type is980N/mm ² > P'=0.085N/mm ² , safety is secured.

Other Design Consideration

  • Oil free bushings are installed on both the horizontal pins and the vertical shafts.

Explore Similar Application Examples

Page - / -

Part List

No. Part Name Sample Picture MISUMI Part Number
For Price and Days to ship click on Part No.
Quantity
1 Metal Washers WSSB13-4-3 1
2 Oil Free Bushings MPBZ12-12 2
3 Oil Free Bushings MPBZ8-10 4
4 Compression Springs WR16-30 1
5 Linear Shaft SSFUW8-78-M4-N4 1
6 Toggle Clamps MC01-2B 1
  • The part list above only contains MISUMI parts.
    Part list download (CSV) includes MISUMI and third party components used in this example.
  • Terms of Use for CAD Data and Simplified Drawing Data
    These terms and conditions (hereinafter referred to as “the Terms") set forth the conditions for downloading CAD data and simplified drawing data posted on https://mx.misumi-ec.com/ (hereinafter referred to as the "Website") operated by MISUMI MÉXICO, S. DE R.L. DE C.V. (hereinafter referred to as "MISUMI"). By downloading CAD data and simplified drawing data posted on the Website (hereafter referred to as “Data”), customers are deemed to have agreed to these Terms.

    1. Purpose of Use
    MISUMI offers the following:
    1) CAD data found on the Website (3D CAD data, 3D Intermediate data and 2D CAD data) for the purpose of informing customers of the characteristics of the products offered by MISUMI or a manufacturer affiliated with MISUMI for use in their designs.
    2) Simplified drawing data (in PDF format) for the purpose of checking the specifications of products.
    2. Characteristics of Data
    There may be a discrepancy in certain characteristics of products (for example: tolerance, surface roughness, chamfer, etc.) between the Data and the actual product. Furthermore, for the purpose of reducing the file size of the Data, some information such as oil groove shapes, threads, or spring shapes, may be removed from the Data.
    3. Disclaimer
    MISUMI carefully creates the Data but makes no warranty as to the accuracy of the Data. MISUMI may at any time, and with no prior notice to customers, revise or delete Data. MISUMI assumes no responsibility for any damage or loss resulting from any revision or deletion of the Data, or any errors in said data. Customers are solely responsible for all aspects of their own designs, including those made using MISUMI’s CAD data. MISUMI may provide customers with design example data on the Website, but the quality, accuracy, functionality, safety, reliability, etc., of such data are not guaranteed. MISUMI may, at any time, and in its sole discretion, request that the customer cease its use of or destroy the Data in its possession. MISUMI may request the customer provide MISUMI documentation of such destruction.
    4. Prohibited Acts
    Customers or users of the Data, are prohibited from the following acts regarding the Data, in whole or in part:
    (1) Requesting quotations or placing orders for products with third parties other than those authorized by MISUMI or its affiliates;
    (2) Receiving quotations or orders for products from third parties by providing the Data to a third party or using the Data in their own business;
    (3) Displaying links to the Website related to the Data on their own websites, etc., without MISUMI's consent;
    (4) Using or reproducing the Data beyond the scope of the above-stated Purpose of Use;
    (5) Modifying, altering, tampering with, translating, or adapting the Data;
    (6) Selling, transferring, lending, sublicensing, or providing the Data to third parties in any way without MISUMI’s consent;
    (7) Altering the content, reverse engineering, decompiling, disassembling, or analyzing the Data;
    (8) Publicly disclosing or exhibiting the Data without MISUMI's consent;
    (9) Using the Data for the purpose of providing products and services identical or similar to those of MISUMI;
    (10) Performing acts that interfere with the proper functioning of this Website, such as acquiring Data in bulk.
    5. Copyright
    All title and copyright in and to any information contained in the Data are owned by MISUMI or the relevant manufacturer affiliated with MISUMI and are protected by applicable copyright laws and international treaties. By downloading Data, the customer acquires no ownership rights of any kind in the intellectual property contained within. Without prior approval from MISUMI, no part of the Data may be utilized (reproduced, modified, reverse-engineered, uploaded, presented, sent, distributed, licensed, sold, or published) for any purpose other than that mentioned above.
    In the event Data is found to have been to be used for any purpose other than that mentioned above or against any applicable laws, MISUMI may pursue any legal remedy available to it, which may result in forbidding the offending user from using the Data or accessing the Website.
    6. Third-Party Data
    MISUMI offers some Data provided by third parties. Such Data may be subject to separate terms and conditions, in addition to these terms. MISUMI makes no guarantee or warranty regarding Data from third parties.
    7.Export Control
    Customers shall comply with all applicable laws and regulations regarding the export of the Data.
    8. Amendments to the Terms
    MISUMI may, at any time, and in its sole discretion, modify these terms and conditions; any such modification will be effective immediately.
    9. Severability
    If any term or provision of these Terms is invalid, illegal, or unenforceable in any jurisdiction, such invalidity, illegality, or unenforceability shall not affect any other term or provision of these Terms or invalidate or render unenforceable such term or provision in any other jurisdiction.
    10. Miscellaneous
    These Terms and any disputes arising in connection therewith shall be exclusively governed by and construed in accordance with the laws of the United Mexican States, without regard to its conflicts of law principles. The state and federal courts located in Queretaro, Mexico shall have exclusive jurisdiction to adjudicate any dispute arising in connection with these Terms. By downloading the Data, you agree to submit to the exclusive and personal jurisdiction of the state and federal courts located in Queretaro, Mexico.

    Revised: 27/10/2025

    CAD Download (Unit Assembly)

    CAD Download: File Format
    生成

    Thank you for downloading the data.

    Click the Good IDEA! button when you find interesting design tips.


    This data is utilized in order to list more useful application examples in the future.

    CAD Data Limitations

    1. Assembly data shows the assembly drawings in the concept design phase. The sole purpose of the data is to explain the structure and functionality of the assembly and is not considered nor to be used as a final design.
      You will need to edit the Data so that it meets your specific design conditions.
    2. Unit assembly Data consists of some sub-assemblies.
      It is configured so that each sub-assembly unit can be used as it is or edited.
    3. * The part in the frame is a sub-assembly unit.

    4. The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
    5. The Data including the third-part components are made by the Company.

    Page top

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