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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 AND CONDITIONS FOR USE OF CAD DATA
    Your access to the CAD data that MISUMI Corporation (hereinafter referred to as the Company) posts on this site (including 3D CAD data, intermediate 3D CAD data and 2D CAD data; hereinafter referred to as the Data) are of products manufactured and/or sold by the Company (hereinafter referred to as the Products) assumes that you have read and accepted these terms and conditions which govern your use of the Data. If you do not agree to these terms and conditions, you must stop using this website and the Data. You must not use the Data for any unlawful purpose or in any manner inconsistent with these terms and conditions.
    1. CAD Data
    The Data is prepared for assisting the Company's users in the CAD design process by providing dimensions and other Product information. In order to provide the best speed and stability working within this site, the Product drawings were simplified to reduce the size of the Data. For instance, some of the Products are shown without the oil groove shape, screws or spring shape. Also, please be aware that the tolerance, surface roughness and/or chamfer of the Data may vary from the actual Products.
    2. Disclaimer on Data
    While the Company has carefully prepared the Data, accuracy of the Data is not guaranteed and is subject to the variances as described above. The Company may also modify, add or delete the Data at any time without prior notice. The Company assumes no liability for any direct, indirect, consequential or special damages that you may claim resulted from your use of the Data or any changes to or deletions of the Data regardless of the reason. The Company provides no warranty as to the quality, accuracy, functionality, safety or reliability of the combination of Products and parts. Example applications and combinations of the Products are provided for illustrative purposes only.
    3. Copyright
    Copyrights to the content and the Data belong to the Company or the manufacturers of the Products. The said copyright is protected by the Copyright Act and international treaties. The use (including duplication, modification, uploading, posting, transmission, distribution, licensing, sales and publishing) of the Data except for the purpose to use the Data described above without prior approval of the Company is not allowed. The Data cannot be used for any purposes (including sales promotion) except for designing your machine. If you violate this provision or the laws or regulations, the Company may prohibit you from the use of the Data, the Company’s site and/or take legal action. So long as you comply with these terms and conditions, the Company grants to you a non-exclusive, non-transferable, revocable license to access and use the Data for the sole purpose of assisting you in designing machines that incorporate products.
    In case that the CAD data is found to have been to be used for any purpose other than mentioned above or against the related laws, MISUMI may take legal actions, including the one for blocking the involved user from using CAD data and from accessing to the MISUMI site.
    4. Disclaimer of Warranty
    ANY AND ALL CONTENT APPEARING ON THIS WEB SITE IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY. THIS WEB SITE, ITS CONTENT AND ITS LINKS ARE PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS AND ARE USED ONLY AT YOUR SOLE RISK, TO THE FULLEST EXTENT PERMISSIBLE BY LAW. THE COMPANY DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, OF ANY KIND, REGARDING THIS WEB SITE (INCLUDING ITS CONTENT, HARDWARE, SOFTWARE AND LINKS), INCLUDING AS TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, TITLE, NON INFRINGEMENT, RESULTS, ACCURACY, COMPLETENESS, ACCESSIBILITY, COMPATIBILITY, SECURITY AND FREEDOM FROM COMPUTER VIRUS. THE COMPANY WILL NOT BE LIABLE FOR ANY DAMAGES OR LOSSES, INCLUDING DIRECT, INDIRECT, CONSEQUENTIAL, SPECIAL, INCIDENTAL OR PUNITIVE DAMAGES AND/OR LOST PROFITS, IN CONNECTION WITH USE OF THE INTERNET, THIS WEB SITE, ITS CONTENT OR ITS LINKS
    Further, the Company will not be liable to you for any failure or delay by the Company to provide access to the Data or any of its obligations under these terms and conditions where such failure or delay is the direct or indirect result of any circumstances beyond the Company's reasonable control (and the Company's obligations will be suspended for the duration of such circumstances).

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    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 Quantity
1 Metal Washers - T Dimension Configurable, Precision Class WSSB13-4-3 1
2 Oil Free Bushings - Copper Alloy Straight, Standard MPBZ12-12 2
3 Oil Free Bushings - Copper Alloy Straight, Standard MPBZ8-10 4
4 Round Wire Coil Springs/Deflection 60%-75%/O.D. Referenced WR16-30 1
5 Linear Shafts-Both Ends Tapped SSFUW8-78-M4-N4 1
6 Toggle Clamps - Hold Down, Horizontal Standard Handle (Flange Base) 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 AND CONDITIONS FOR USE OF CAD DATA
    Your access to the CAD data that MISUMI Corporation (hereinafter referred to as the Company) posts on this site (including 3D CAD data, intermediate 3D CAD data and 2D CAD data; hereinafter referred to as the Data) are of products manufactured and/or sold by the Company (hereinafter referred to as the Products) assumes that you have read and accepted these terms and conditions which govern your use of the Data. If you do not agree to these terms and conditions, you must stop using this website and the Data. You must not use the Data for any unlawful purpose or in any manner inconsistent with these terms and conditions.
    1. CAD Data
    The Data is prepared for assisting the Company's users in the CAD design process by providing dimensions and other Product information. In order to provide the best speed and stability working within this site, the Product drawings were simplified to reduce the size of the Data. For instance, some of the Products are shown without the oil groove shape, screws or spring shape. Also, please be aware that the tolerance, surface roughness and/or chamfer of the Data may vary from the actual Products.
    2. Disclaimer on Data
    While the Company has carefully prepared the Data, accuracy of the Data is not guaranteed and is subject to the variances as described above. The Company may also modify, add or delete the Data at any time without prior notice. The Company assumes no liability for any direct, indirect, consequential or special damages that you may claim resulted from your use of the Data or any changes to or deletions of the Data regardless of the reason. The Company provides no warranty as to the quality, accuracy, functionality, safety or reliability of the combination of Products and parts. Example applications and combinations of the Products are provided for illustrative purposes only.
    3. Copyright
    Copyrights to the content and the Data belong to the Company or the manufacturers of the Products. The said copyright is protected by the Copyright Act and international treaties. The use (including duplication, modification, uploading, posting, transmission, distribution, licensing, sales and publishing) of the Data except for the purpose to use the Data described above without prior approval of the Company is not allowed. The Data cannot be used for any purposes (including sales promotion) except for designing your machine. If you violate this provision or the laws or regulations, the Company may prohibit you from the use of the Data, the Company’s site and/or take legal action. So long as you comply with these terms and conditions, the Company grants to you a non-exclusive, non-transferable, revocable license to access and use the Data for the sole purpose of assisting you in designing machines that incorporate products.
    In case that the CAD data is found to have been to be used for any purpose other than mentioned above or against the related laws, MISUMI may take legal actions, including the one for blocking the involved user from using CAD data and from accessing to the MISUMI site.
    4. Disclaimer of Warranty
    ANY AND ALL CONTENT APPEARING ON THIS WEB SITE IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY. THIS WEB SITE, ITS CONTENT AND ITS LINKS ARE PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS AND ARE USED ONLY AT YOUR SOLE RISK, TO THE FULLEST EXTENT PERMISSIBLE BY LAW. THE COMPANY DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, OF ANY KIND, REGARDING THIS WEB SITE (INCLUDING ITS CONTENT, HARDWARE, SOFTWARE AND LINKS), INCLUDING AS TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, TITLE, NON INFRINGEMENT, RESULTS, ACCURACY, COMPLETENESS, ACCESSIBILITY, COMPATIBILITY, SECURITY AND FREEDOM FROM COMPUTER VIRUS. THE COMPANY WILL NOT BE LIABLE FOR ANY DAMAGES OR LOSSES, INCLUDING DIRECT, INDIRECT, CONSEQUENTIAL, SPECIAL, INCIDENTAL OR PUNITIVE DAMAGES AND/OR LOST PROFITS, IN CONNECTION WITH USE OF THE INTERNET, THIS WEB SITE, ITS CONTENT OR ITS LINKS
    Further, the Company will not be liable to you for any failure or delay by the Company to provide access to the Data or any of its obligations under these terms and conditions where such failure or delay is the direct or indirect result of any circumstances beyond the Company's reasonable control (and the Company's obligations will be suspended for the duration of such circumstances).

    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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