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inCAD Library

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  • Helpful application examples for mechanical engineers.

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No.000179 Centering Mechanism Utilizing Floating Joint
Good IDEA!
6

Correction of angular misalignment generated by the suction cup

Relevant category

Floating Joint

Floating Joint
Product name Floating Connectors - Extra Short Threaded Stud Mount
Part number FJCMXS6-1.0
Features Floating joint is used to compensate any misalignment between cylinder and moving object.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes

Selection criteria

Suitable for angular misalignment

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Available sizes

■Floating Joint - Extra Short

Body/Cover Joints Spring Washer
Material Surface Treatment Material Surface Treatment Hardness Material Material Surface Treatment Hardness
1045 Carbon Steel Black Oxide 1045 Carbon Steel Black Oxide 35~45
HRC 		304 Stainless Steel 304 Stainless Steel Nitriding Treatment 600HV~
304 Stainless Steel - 440C Stainless Steel -

■Sizes

Cylinder Mounting Side Output Allowable Lateral
Misalignment 		Allowable Angular
Misalignment 		Body
Thickness 		Body
Hex Size 		Overall Length
Thread Dia. - Pitch Thread Length Thread Dia. - Pitch Thread Length
M5-0.8 6 M8-1.25 8.5 0.5 4° 14 24 33
M6-1.0
M8-1.25 8.5 M10-1.5 10 15.5 27 39.5
M10-1.5 10 M14-2.0 11 19.5 30 47

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Spring Plungers

Spring Plungers
Product name Spring Plungers - Stainless Steel
Part number PJHK5-5
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Performance info.

Selection criteria

Spring load and overall size

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Available sizes

■Spring Plungers - Stainless Steel

Nose
Material 		Load type Body Nose Spring Operating Temperature
Material Material Hardness Material
Stainless Steel Ultra Light Load 304 Stainless Steel 440C Stainless Steel 55HRC- 631 Stainless Steel -30~260℃
Light Load
Heavy Load
Extra Heavy Load
Plastic Ultra Light Load Polyacetal - -30~80℃
Light Load
Heavy Load
Extra Heavy Load

■Sizes and Dimensions

Screw Dia.
(Coarse) 		Nose Body length
Diameter Stroke
M3 φ1 1.5 15
3 15
M4 φ1.6 2 15
4 24
M5 φ2 3 20
5 27
M6 φ2.5 3 25
5 30
M8 φ3.1 3 25
5 27
M10 φ3.8 5 30
10 43
M12 φ5.5 5 30
10 43
15 51
M16 φ8 10 57
15 57
20 65

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Performance info.

■Spring Load (N) of Spring Plunger (Stainless Steel)

Load type
Screw Dia.
(Coarse) 		Nose Ultra Light Load Light Load Heavy Load Extra Heavy Load
Diameter Stroke min． max． min． max． min． max． min． max．
M3 φ1 1.5 0.12 0.4 0.4 1.3 0.8 2.94 1.1 3.42
3 0.12 0.4 0.2 1.3 0.6 2.93 0.8 3.41
M4 φ1.6 2 0.27 0.65 0.9 2 2 8.8 6.1 13.8
4 0.18 0.65 0.6 2.1 1.9 8.75 5.8 13.6
M5 φ2 3 0.4 3 1.4 9.7 2.7 16.3 6.8 22
5 0.35 3 1.1 10.3 1 17.1 5.7 21.5
M6 φ2.5 3 1.8 3.05 6 9.8 8 26.4 15.8 35.6
5 1.5 3.05 3.4 9.86 4.4 26.6 12.9 34.4
M8 φ3.1 3 1.9 3.15 6 9.9 14.7 27 21.9 36.3
5 1.4 3.15 4 9.83 6.7 26.6 14.7 34.5
M10 φ3.8 5 1.6 4.6 5.7 14.7 8.2 45.7 24.5 58.6
10 1.6 4.6 4.4 14.7 6.2 45.1 19.8 58.7
M12 φ5.5 5 1.7 4.7 5.8 14.7 18.2 49 34.9 63.6
10 1.6 4.7 5 14.7 8.2 49.1 25.5 63.6
15 1.8 4.7 6.9 14.7 7.5 48.9 20.1 63.7
M16 φ8 10 2.8 10.8 9.2 34.2 18.9 68.5 38.7 88.4
15 2.6 10.8 8.6 34.4 14.4 68.6 33.9 88.1
20 2 11 7.1 34.4 4.2 68.6 25.4 88.1

* Min. is the initial load, and max. is the load when the nose is fully compressed.

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Suction Cup Fittings

Suction Cup Fittings
Product name Suction Cups - with Fitting, Spring Type, Shape K
Part number MVPKN15
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes

Selection criteria

Suitable for lifting a workpiece from uneven surfaces

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Available sizes

■Suction cup with fitting (With pad) Fixed type, Top tube connection: One touch type (Shape K)

Body Material Surface Treatment Pad Shape Pad Material
Brass Electroless
Nickel Plating 		Standard Nitrile Rubber
Conductive Silicon Rubber
Fluorinerubber
Deep type Nitrile Rubber
Fluorinerubber

■Sizes and Dimensions

Pad Shape Suction Cup Connection Dia. Overall Length Mounting thread DIA. x Pitch
O.D. Length
Standard φ2 4 φ4 28.3 M6×0.75
φ3
φ4
φ6 7 φ6 32.6 M10×1.0
φ8 5.5 31.1
φ10 8 34.1 M12×1.0
φ15 9 35.1
φ20 10 37.5 M14×1.0
Deep type φ20 11 38.7
φ25 12 39.7
φ30 14 41.7
φ40 17.5 45.2

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IDEA NOTE Centering of the suction cup by using floating joint

Floating joint allows for lateral and angular misalignment. Spring plunger are used for level restoration and centering.

  • 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)

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


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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.

    3. The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
    4. 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

  • Purpose
    • Correction of angular misalignment of workpiece.
  • Operation
    • Descend the arm so that the suction cups attach to a workpiece. The suction cup surface will follow the tilt of the workpiece because of the allowable angular misalignment tolerance of the floating joint. Once the workpiece is suctioned, lift the workpiece so that the angular misalignment is restored. Angular misalignment is restored by repulsive force of the spring plungers.

Target workpiece

  • Shape: Flat plates such as circuit boards, etc.
  • Size: W 200ｘL 200ｘH 0.8 mm
  • Weight: 500 g

Design Specifications

Operating Conditions or Design Requirements

  • Arm upper surface - Suction cup surface: 57 mm
  • External size: W 341 x D 142 x H 58 mm
  • Allowable lateral misalignment

    To have a rotation center at a position different from the center axis passing through the center of gravity of an object

    ：0.5、allowable angular misalignment: 4°;

Required Performance

  • Locating accuracy: ± 1 mm

Selection Criteria for Main Components

  • Floating joint: Shall have lateral misalignment

    To have a rotation center at a position different from the center axis passing through the center of gravity of an object

    tolerance and angular misalignment tolerance.
  • Suction cup: Shall not exceed the allowable weight of the floating joint.

Design Evaluation

Verification of main components

  • Verify the suction force is sufficient to hold workpiece.
  • Work retention weight
    • Conditional values: maximum tension using force of the floating joint: F1 = 500N
      Suction holder pad diameter: D = 1.5 cm
      Vacuum level: P = - 60 kPa
      Number of suction holders: n = 4 [pieces], Horizontal sling safety factor: f = 4, gravitational acceleration: g = 9.8 N/m2
      Pad area: C = D2 x (π/4) = 1.77 cm2
      Suction force per suction holder: W = {(C x P)/101} x 10.13 x (1/f) Thus, W = 2.66 N
      Suction force with 4 suction holders: W' = 4 x W = 10.6 N
    • F1 >> W" Thus, sufficiently safe for the floating joint.
    • Maximum weight of the workpiece = W' /g = 1.08 kg Thus, safe against workpiece weight of 500 g.

Other Design Consideration

  • The overall unit height can be reduced by using a floating joint.
  • Roughness of cone-shaped plunger support may hinder level restoration and centering. Make sure the finish is Ra 1.6 or better.

Explore Similar Application Examples

Page - / -

Part List

No. Part Name Sample Picture MISUMI Part Number
(click the Part Number below for details) 		Quantity
1 Floating Joints FJCMXS6-1.0 1
2 Spring Plungers PJHK5-5 4
3 Suction Cups - with Fittings MVPKN15 4
  • 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.

    Good IDEA!

    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.

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

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