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No.000100 Plastic case press-fit fixture
Good IDEA!
36

Press-fitting fixture with 2 stage spring structure

Related Category

Round Wire Coil Spring

Round Wire Coil Spring
Product name Round Wire Coil Springs/Deflection 25%-30%/O.D. Referenced
Part number WH18-25
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Risk info. | Available sizes | Performance info. | Technical calculations

Selection criteria

Based on needed press-fit load.

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Risk info.

Trial and error testing needed.

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Available sizes

■Round wire coil spring O.D. referenced type (Overview)

Deflection
(Free length ratio) 		Material O.D. Free length
Spring Steel (ASTM A228) EN 1.4301 Equiv. Range Range
75% ○ ○ Ø3 ~ 16 5 ~ 70
60% ○ ○ Ø3 ~ 27 5 ~ 90
45% ○ ○ Ø3 ~ 27 5 ~ 90
40% ○ ○ Ø2 ~ 27 5 ~ 100
40% ○ ○ Ø3 ~ 27 5 ~ 80
35% ○ ○ Ø3 ~ 27 5 ~ 100
30% ○ ○ Ø4 ~ 27 5 ~ 100
25% ○ ○ Ø3 ~ 27 5 ~ 100

■Sizes and Dimensions

O.D. Free length Coil wire DIA. Solid height Max. deflection Load (N)
Ø14 15 Ø1.6 10.4 4.5 44.1
20 6 58.8
25 7.5 73.5
30 Ø1.7 12.8 9 88.3
35 10.5 103.0
40 Ø1.9 20 12 117.7
45 13.5 132.4
50 Ø2.1 30.5 15 147.1
55 16.5 161.8
60 18 176.5
65 Ø2.2 37.4 19.5 191.2
70 21 205.9
80 Ø2.3 47.2 24 235.4
Ø16 15 Ø1.7 10.2 4.5 44.1
20 Ø1.8 12.6 6 58.8
25 Ø1.9 14.5 7.5 73.5
30 9 88.3
35 Ø2.0 18 10.5 103.0
40 Ø2.1 21 12 117.7
45 Ø2.2 26 13.5 132.4
50 15 147.1
55 16.5 161.8
60 Ø2.3 32 18 176.5
65 19.5 191.2
70 Ø2.4 38 21 205.9
80 Ø2.5 47.5 24 235.4
Ø18 20 Ø2.1 12.6 6 88.3
25 Ø2.2 15.4 7.5 109.8
30 9 132.4
35 Ø2.3 18.4 10.5 154.0
40 Ø2.4 21.6 12 176.5
45 Ø2.5 25 13.5 199.1
50 15 220.6
55 Ø2.6 30 16.5 242.2
60 18 264.8
65 Ø2.8 42 19.5 286.4
70 21 308.9
80 Ø2.9 49.3 24 353.0
(90) Ø3.0 57 26.1 397.2
(100) 24 441.3
Ø20 20 Ø2.2 12.7 6 88.3
25 Ø2.3 15 7.5 109.8
30 9 132.4
35 Ø2.5 20 10.5 154.0
40 12 176.5
45 13.5 199.1
50 Ø2.6 22.8 15 220.6
55 16.5 242.2
60 Ø2.8 30.8 18 264.8
65 19.5 286.4
70 Ø3.0 42 21 308.9
80 24 353.0
90 Ø3.2 56.8 26.1 397.2
100 24 441.3
Ø22 20 Ø2.3 12.7 6 88.3
25 Ø2.5 16.7 7.5 109.8
30 9 132.4
35 Ø2.6 18.2 10.5 154.0
40 Ø2.8 25 12 176.5
45 13.5 199.1
50 15 220.6
55 Ø3.0 33 16.5 242.2
60 18 264.8
65 19.5 286.4
70 Ø3.2 43 21 308.9
80 24 353.0
(90) 26.1 397.2
(100) Ø3.5 64.4 26 441.3

* Other sizes are available. Please see the product pages.

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Performance info.

■Round wire coil spring, O.D. selectable type (Stainless steel) spring constant (N/mm)

O.D. Max deflection (free length ratio) type
75% 60% 45% 40% 40% 35% 30% 25%
Ø2 - - - - - - - -
Ø3 0.1 0.3 0.5 1.0 1.5 2.0 3.9
Ø4 2.9 4.9
Ø5 2.0 2.9 5.9 9.8
Ø6
Ø8
Ø10 0.2
Ø12 9.8 19.6
Ø13
Ø14
Ø16
Ø18 - 0.5 1.0 2.9 3.9 4.9 14.7 29.4
Ø20 -
Ø22 29.4
Ø27

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Technical calculations

■Load calculation of Round wire coil spring

P = k x F

P: Load (N)
k: Spring constant (N/mm)
F: Deflection (mm)

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Magnetic Catch

Magnetic Catch
Product name Dust-Proof Magnet Catches
Part number MGCC1
Features Low Particle Generation Type made of Polyacetal
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes

Selection criteria

Suitable for temporary retaining of workpiece pallet.

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Available sizes

■Low particle generation magnetic catch

Retention force
(kgf) 		Color
1.0 Black
1.4 Gray
2.0 Milky white
3.3 White
No. Part name Material
(1) Main body Polyacetal
(2) Attraction plate EN 1.4016 Equiv.
(3) Magnet Neodymium magnet

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IDEA NOTE Open Fixture

When the rack press is not loaded, the workpiece location is held open by the springs.

IDEA NOTE Pallet is fixed with magnets

In order to stabilize the work pallet, the back side is fixed by magnets.

  • 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.
    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).
    5. Policy of Third Parties
    You may be required to separately agree to third party's policies if you use third party software to create or browse the Data or use a third party’s CAD data. In this case, the Company does not assume any responsibility for defects of such CAD data or the software of the third party or violation of their rights. Understand them before use.

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    Click the Good IDEA! button when this application example is helpful.


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    Cautions on the CAD data

    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. The CAD data unit assembly consists of sub-assemblies.
      Each sub-assembly unit can be used as it is or can be 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 CAD data consists of some sub-assemblies.
       Each sub-assembly unit can be used as it is or can be edited.

Application Overview

Purpose

  • Workpiece is press-fit with a rack press.
  • The top spring is used to achieve the necessary press-fit load. The lower springs allow the stage to return.

Points for use

  • This is a manual mechanism. It contains a two stage spring structure.

Target workpiece

  • Plastic case
    Dims.: W47 x D70 x H11mm

Design Specifications

Operating Conditions or Design Requirements

  • External dims.: W200 x D250 x H562 (Max.)mm
  • Rack press max. stroke: 200mm
  • Rack press output: 250kg

Required Performance

  • Applied load: 58.8N

Selection Criteria for Main Components

  • Spring
    • Select spring (spring constant) that has small displacement caused by plate and push plate weight.

Design Evaluation

Verification of main components

  • Verify whether a spring can achieve necessary load.
  • Spring load
    • Applied load: Top stage spring - Lower stage spring = 176.4 - 117.6 = 58.8N

    • Formula: Reaction force F = kx
      Assumed load: F = 176.4N (With 2 springs)
      Assumed deflection when pressure applied: x = 6mm (no pre-compression->Set length = Free Length = 25mm, When stroked deflection = 6mm)
      Spring constant: k = 176.4 / 2 / 6 = 14.7N/mm is selected

    • Formula: Reaction force F = kx
      Assumed load: F = 117.6N (With 2 springs)
      Assumed deflection when pressure applied: x = 6mm (pre-compressed 1.36mm, Set length 28.64mm, Free length: 30mm, When stroked 4.64mm)
      Spring constant: k = 117.6 / 2 / 6 = 9.8N/mm is selected
      Plate + Push plate 2 weight: 3.5N ⇒ 0.36mm deflection

Other Design Consideration

  • Provide holes for anchors on the base to prevent moving when the rack press is operated.
  • To allow for installation and removal of workpiece support base, provide openings for operator's hands.
  • For the workpiece pallet, use locating pins for workpiece positioning.
  • Contact surface of the rack press is lined with a stainless steel plate for wear and deformity prevention.

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 Compression Springs WH18-25 2
2 Compression Springs WH16-30 2
3 Oil Free Bushings MPBZ10-10 4
4 Linear Shaft SSFJW10-80-M6-N6 2
5 Metal Washers FWSSS-D25-V10.5-T2.0 6
6 Metal Washers FWSSS-D20-V6.5-T2.0 2
7 Hex Posts SLSBF13-45.5-M8-N8 4
8 Dowel Pins MSC4-10 5
9 Dust-Proof Magnet Catches MGCC1 1
10 Locating Pins SLPSQAG3-L8 2
  • The part list above contains only MISUMI parts.
    The list of parts and machined products of other manufacturers than MISUMI can also be downloaded by part list download (CSV).
  • 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.
    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).
    5. Policy of Third Parties
    You may be required to separately agree to third party's policies if you use third party software to create or browse the Data or use a third party’s CAD data. In this case, the Company does not assume any responsibility for defects of such CAD data or the software of the third party or violation of their rights. Understand them before use.

    CAD Data Download (Unit Assembly)

    CAD Data Download: File Format
    生成

    Thank you for downloading the data.

    Click the Good IDEA! button when this application example is helpful.


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

    Good IDEA!

    Cautions on the CAD data

    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. The CAD data unit assembly consists of sub-assemblies.
      Each sub-assembly unit can be used as it is or can be 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.

    Back to top

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