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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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  • MISUMI may not offer all parts in each application design. Available parts can only be purchased separately not as a unit shown in each application design.
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    collected from dozens of industries!

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No.000277 Workpiece Air Tightness Check Fixture
Good IDEA!
0

Checks air leakage by creating an air tight condition with a cylinder.

Relevant category

Fixture Slides

Fixture Slides
Product name Fixture Slides - Guide Rail Type
Part number JGR250
Features High load capacity is achieved by use of guide rails. Suitable for high load applications, such as press-fitting, press and machining.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Performance info.

Selection criteria

Select the slide unit with guide for mounting/dismounting workpieces.

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Available sizes

■Fixture Slides - Guide Rail Type

Main Body Material Surface Treatment
Table 1045 Carbon Steel Thermal Refined Material Electroless
Nickel Plating
Plate
Guide Rail
Handle Bracket 1045 Carbon Steel
Handle Alum. Alloy Clear Anodize

■Sizes and Dimensions

Type Stroke
(mm) 		Table Size
(mm) 		Base Length
(mm)
150 50・100・150 150×150 325
250 150・200・250 150×150 425

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Performance info.

■Speeds·Loads (Load info.) of Sliders for Fixture

Type Required Thrust
（N) 		Plunger Retaining Force
(N) 		Withstand Load
(kN)
150 10 30 37.2
250 10 30 37.2

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Air Cylinder

Air Cylinder
Product name Air Cylinders - Pen, Double Acting
Part number MSPCN20-50
Features Double Acting Type Cylinders - Compact and Pen-style - for increased space saving
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Selection steps | Performance info.

Selection criteria

Select the cylinder that has the thrust capable of pressing the lid for air tight test of workpiece.

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Available sizes

■Air Cylinders - Pen, Double Acting

Cyl.
Bore 		Cylinder Stroke Cylinder O.D. Overall Length
(Listed below + St)
St 15 25 30 45 50 60 100
φ6 ○ - ○ ○ - ○ - 12×12 77
φ10 ○ - ○ ○ - ○ - 12×12 74
φ16 ○ - ○ ○ - ○ - 18×18 75
φ20 ○ ○ - - ○ - ○ 28×28 131
φ25 ○ ○ - - ○ - ○ 33.5×33.5 142
φ32 ○ ○ - - ○ - ○ 37.5x37.5 155

* Sensor is sold separately

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Selection steps

■Cylinder Selection Steps

1. Define various conditions of the load.
↓
2. Calculate cylinder output (In case of double acting type)
↓
3. Determine the bore dia.
↓
4. Determine the theoretical reference speed.
↓
5. Verify the cylinder's cushion mechanism.
↓
6. Verify the lateral load applied to the cylinder.

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Performance info.

■Compact Cylinder Operating Pressure Range

Min. Operating Pressure (MPa):　0.06
Max. Operating Pressure (MPa):　0.7
Pressure Resistance (MPa):　1.0

■Theoretical Thrust

(N)

Cyl.
bore 		Operating
Direction 		Operating Pressure (MPa)
0.4 0.5
φ6 Push 11.3 14.1
Pull 8.5 10.6
φ10 Push 31.4 39.3
Pull 26.4 33
φ16 Push 80 101
Pull 73 91
φ20 Push 126 157
Pull 94 118
φ25 Push 196 245
Pull 165 206
φ32 Push 322 402
Pull 346 415

■Allowable Lateral Load

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EPT Sealer® Sponge

Dustproof General-Purpose Sponges
Product name Dustproof General-Purpose Sponges
Part number EPA-100-100-5
Features High performance sealing material that can fill all types of gaps to keep out heat, moisture and sound.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Risk info. | Available sizes | Accuracy Info | Performance info.

Selection criteria

Provides an air tight seal

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Risk info.

Cutting may be required to suit workpiece size.

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Available sizes

■Dustproof General-Purpose Sponges

Material
Sponge Seal
EPDM Foam
(EPT Sealer®) 		Adhesive with Unwoven
Cloth Base Material
EPDM Foam
(Opsealer®) 		Adhesive with Net
Base Material

■Sizes and Dimensions

10 mm Increment Thickness (Selectable)
Long Length Direction Short Length Direction
20～500 20～400 3
5
8
10
15
20
25
30

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Accuracy Info

■Accuracy of EPT Sealer® Sponge

Thickness Tolerance
3～10 ±1.0
15～25 ±2.0
30 ±2.5
External Dimensions Tolerance
20 ±2.0
30～50 ±2.5
60～140 ±3.5
150～290 ±6.5
300～500 ±9.0

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Performance info.

■Characteristic Value of EPT Sealer® Sponge

* The values are not guaranteed but measured ones.

Measurement Item EPA
(Unwoven Cloth Base Material) 		EPAOP
(Net Base Material)
Color Black Black
Specific Gravity 0.11 0.08
Tensile Strength 0.08 0.1
Elongation (%) 450 205
Compression Hardness (25%) (kg/cm²) 0.02 0.04
Compression Hardness (50%) (kg/cm²) 0.05 0.05
Compression Ratio (%) 50 × △
60 △ ○
70 ○ ○
80 ○ ○

○: No leakage of water after 30min.
△: Leakage of water is seen after 30min.
X: Leakage of water is seen within 10min.

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IDEA NOTE Checks air leakage by creating an air tight condition with a cylinder.

Compresses the sheet mounted on the pusher by using cylinder thrust.

  • 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.

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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

  • Puts the workpiece in an air tight chamber. Air is blown in from external unit to check for air leakage in the weld on the workpiece.
  • The sponge sheet acts as a stopper for the cylinder stroke.

Points for use

  • A manual mechanism puts in and takes out the workpiece.

Target workpiece

  • Heat-welded plastic cases.
  • External dimensions: φ86 x 33mm
  • Weight 80g

Design Specifications

Operating Conditions or Design Requirements

  • Fixture slider stroke 250mm.
  • Cylinder stroke 45mm
  • External dimensions: W400xD430xH339mm

Required Performance

  • Cylinder thrust 113N or more at operating pressure of 0.4MPa.

Selection Criteria for Main Components

  • Cylinder
    • Ensure the cylinder meets the required thrust.

Design Evaluation

Verification of main components

  • Select the cylinder thrust from the counterforce at sheet compression.
  • Cylinder
    • Conditional values: Sheet compression stress p = 0.021MPa, sheet compression area S = 5408mm²
    • Counterforce at sheet compression: R = p × S Thus, R = 0.021 × 5408 ≒ 113N
      ⇒Select a cylinder with a thrust of 126N.

Other Design Consideration

  • Use of a fixture slider simplifies design.
  • The cylinder needs to compress the EPT sealer sponge to 70% or less of its thickness to ensure being air tight.
  • Installing a separate pressure gauge between the compressor and the corresponding equipment allows air leakage to be accurately detected.
  • A cover is installed on the cylinder operating part for safety.

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 Jig Sliders JGR250 1
2 Air Cylinders MSPCN20-50 1
3 Floating Joints FJAZ8 1
4 Flow Rate Control Valves SPSNS6-1 2
5 One-Touch Couplings MSCNL6-1 1
6 Linear Shaft SFJC12-120-M6-SC15 2
7 Hex Posts LSBWF13-162 4
8 Linear Bushings LHFC12 2
9 Dustproof General-Purpose Sponges EPA-100-100-5 1
10 Socket Head Cap Screws-with Washer SCBS6-15 14
11 Socket Head Cap Screws-with Washer SCBS6-20 4
12 Socket Head Cap Screws-with Washer SCBS8-20 4
13 Socket Head Cap Screws-with Washer SCBS8-30 4
14 Socket Head Cap Screws-with Washer SCBS6-30 2
15 Sensors For Air Cylinder MSRCS20 2
  • 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.

    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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