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  • Helpful application examples for mechanical engineers.

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No.000086 Two-Step Shutter

Two-step shutter using pneumatics and linear bushings.

Cylinder

Product name Compact Cylinders
Part number MSCCN50-100
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Effective for compact applications.

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Available sizes

■Compact Cylinders

Tube
I.D.(mm)
Cylinder Stroke
St
Cylinder O.D.
(mm)
Overall Length
(Listed below + St)
φ12 5-30(5Increments) 25x25 25.5
φ16 29x29
φ20 5-50(5Increments) 36x36 34
φ25 40x40 37.5
φ32 45x45 40
φ40 5-50(5Increments)、75、100 52x52 46.5
φ50 64x64 48.5
φ63 30, 50, 75, 100 77x77 54

*Sensor sold separately.

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Selection Steps

■Cylinder Selection Steps.

1. Define the requirements for the load.

2. Calculate the cylinder output. (For double-acting type).

3. Determine the tube I.D.

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): 0.1.
Max. Operating Pressure (MPa): 1.0.
Pressure Resistance (MPa): 1.5.

■Theoretical Thrust.

(N)

Tube
I.D.
Operation
Direction
Operating pressure (MPa)
0.4 0.5
φ12 Push 45 57
Pull 34 42
φ16 Push 80 101
Pull 60 75
φ20 Push 126 157
Pull 94 118
φ25 Push 196 245
Pull 151 189
φ32 Push 322 402
Pull 241 302
φ40 Push 503 628
Pull 422 528
φ50 Push 785 982
Pull 660 825
φ63 Push 1247 1559
Pull 1121 1402

■ Allowable Lateral Load.

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Linear Bushing

Product name Linear Bushings with Pillow Blocks - Single Bushing, Wide Block
Part number SLHBBF30
Features Spec-designed to save the time of manufacturing a housing and installing a linear bushing, and to be tightly secured to a workpiece through four mounting holes.
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Housing Unit type meets design requirements.

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Available sizes

■Linear Bushings with Pillow Blocks - Single Bushing, Wide Block

Linear Bushing Used Holder
Material Surface Treatment
Single Aluminum Alloy Clear Anodize

■Sizes and Dimensions.

I.D.
(mm)
Overall Length
(mm)
Mounting screw Dia.
5 18 M3
6 25 M4
8 30
10 35 M5
12 36
13 39
16 44
20 50
25 67 M6
30 72 M8
35 80
40 90 M10
50 110

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Selection Steps

■Linear Bushings with Pillow Blocks Selection Steps.

Determine Application Conditions
(loads, motion pattern, life)

Temporarily select linear bushing specifications
(select the shaft diameter, length, and etc. based on the conditions of use.)

Basic safety check
  • ● Basic static load rating.
  • ● Basic dynamic load rating.
  • ● Allowable static moment.
  • ● Life.

Considerations based on the required performance
● Life variations due to various changes (temperature, hardness, etc.)

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Accuracy Info

■Accuracy of Linear Bushings with Pillow Blocks

(mm)

I.D. I.D. Tolerance Tolerance of Height
from Table Top
5 0
-0.009
±0.02
6
8
10
12
13
16
20 0
-0.010
25
30
35 0
-0.012
40
50

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Performance info.

■Speeds
Load Information for Linear Bushings with Pillow Blocks.

I.D. Basic Load Rating
(mm) Basic Dynamic Load Rating(N) Basic Staic Load Rating(N)
5 167 206
6 206 265
8 265 380
10 372 549
12 412 598
13 510 784
16 775 1180
20 882 1370
25 980 1570
30 1570 2740
35 1670 3140
40 2160 4020
50 3820 7940

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Technical calculations

■Life of Flanged Linear Bushings.

When the linear system is in motion with applied load, the rolling surfaces and races are subject to repeated stress, This stress can cause scale-like flaking due to material fatigue. The total run distance until the flaking appears in the "Life" of the linear system.

Rated life can be calculated with the basic dynamic load rating and the actual load applied to the linear bushings, as shown below.

  • L: Rated Life (km).
  • fH: Hardness Factor (See Fig.1).
  • fT: Temperature Factor (See Fig. 2).
  • fC: Contact Factor (See Table-3).
  • fW: Load Factor (See Table-4).
  • C: Basic Dynamic Load Rating (N).
  • P: Applied Load (N).

● Hardness Factor (fH).

For linear applications, the shafts and ball bearings must have sufficient hardness. If they do not, the load rating decreases and the life will be reduced.

Raceway Surface Hardness.

●Temperature Factor (fT).

When the temperature of the linear system exceeds 100 degrees C, the hardness will decrease and as a result, the allowable load and life will reduced.

Linear System Temperature.

● Contact Factor (fC).

In general, it is common to use two or more bushings on one shaft. In these cases, the load on each bushing will vary depending on the machining precision and will not have equally distributed loads. As a result, the allowable load per bushing will vary depending on the number of bushings used on the rail.

Table-3. Contact factor

Number of Bearings Installed on One Shaft Contact Factor Fc
1 1
2 0.81
3 0.72
4 0.66
5 0.61

Load Factor (fW)

To calculate the load applied to the linear bushings, in addition to the object weight, the inertia force attributed to the motion velocity, moment loads and the variations of each over time must be obtained. However, for reciprocating motion applications, it is difficultto obtain accurate calculations due to the effects of the vibrations and shocks. Therefore, use Table 2 to simplify the life calculations.

Conditions of Use fw
No external shocks / vibrations,
low speed 15 m/min or less
1.0~1.5
No significant shocks / vibrations,
medium speed 60 m/min or less
1.5~2.0
With external shocks / vibrations,
high speed exceeding 60 m/min
2.0~3.5

Life can be obtained by calculating the travel distance per unit of time. When the stroke length and the number of strokes are constant, it can be calculated using the formula below.

  • Lh: Life (hr.).
  • L: Rated Life (km).
  • Ls: Stroke Length (m).
  • n1: Cycles per Minute (cpm).

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Shaft Supports

Product name Shaft Supports - Flanged Mount - Back Mount
Part number STHXC30
Features Shaft can be mounted using a tapped hole.
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Easily assembled and detached.

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Available sizes

■Shaft Supports - Flanged Mount - Back Mount

Material Surface Treatment
1045 Carbon Steel Black Oxide
Electroless Nickel Plating
304 Stainless Steel -

■Sizes and Dimensions.

Type I.D.
(mm)
Overall Length
(mm)
Flange O.D.
(mm)
Round Flanged
Compact Flanged
8 16 28
10 20 30
12 24 36
15 30 40
16 32 42
20 38 50
25 46 55
30 58 66
40 70 88

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Accuracy Info

■Accuracy of Shaft Supports.

(mm)

Hole Dia. I.D. Tolerance
H7
8 +0.015
0
10
12 +0.018
0
15
16
20 +0.021
0
25
30
40 +0.025
0

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IDEA NOTE Two step shutter

By using two air cylinders in series, the shutter height can be altered based on the required operation. For example, this mechanism allows small workpieces to proceed while preventing large workpieces from moving.

IDEA NOTE Low friction coefficient urethane surface

Ceramic urethane is used to absorb the impact of moving workpieces. Additionally, this material has sliding properties that ensure that the workpiece will not stick to this cushion when the shutter is opened.

  • 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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    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.

    4. The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
    5. The dimensions of the MISUMI parts in the Data, which can be specifed at 1mm intervals, can be edited under historical data.
    6. 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

  • Ascending/Descending mechanism that utilizes air cylinders.
  • Two stopping positions are achieved using two pneumatic cylinders arranged in series.

Points for use

  • Automatic shutter

Target workpiece

  • Resin box.
  • Small workpiece outer dimensions: W60 x D80 x H60.
  • Large workpiece outer dimensions: W80 x D100 x H80.

Design Specifications

Operating Conditions or Design Requirements.

  • Outer dimensions: W120 x D500 x H720.

Selection Criteria for Main Components.

  • Cylinder.
    • Selected to automatically open and close the shutter.
  • Linear bushing.
    • Selected to ensure the shutter travels smoothly.
  • Urethane sheet.
    • Selected to reduce the impact of workpieces on the shutter.

Design Evaluation

Verification of main components

  • A cylinder that has the thrust load required to open and close the shutter is selected.
  • Cylinder.
    • A cylinder that can output a load of 150 N (safety factor: 2 times) in the vertical direction is selected.
      A cylinder with a thrust of 300 N is selected from the catalog, and the tube inner diameter d mm is obtained.
    • Tube inner diameter d mm = √(thrust × 4/(load factor × operating pressure × π))
                             =√(300N×4/(0.5×0.4MPa×π))
                             =43.7mm
    • Therefore, a cylinder with an inner diameter of φ50mm is selected.

Other Design Consideration

  • For this design, back mounted shaft supports are used to affix the mechanism to the base plate. This allows the unit to be quickly detached and easily re-assembled.

Explore Similar Application Examples

Page - / -

Part List

No. Part Name Sample Picture MISUMI Part Number Quantity Unit Price*
($)
Days to Ship* Catalog Page Number
1 Compact Cylinders MSCCN50-100 1 Price check 2_1485_2014
2 Compact Cylinders MSCCN50-75 1 Price check 2_1485_2014
3 Housing Units - Wide Blocks - Single / Medium SLHBBF30 4 Price check 1_319_2014
4 Shaft Supports Flanged Mount - Back Mount STHXC30 2 Price check 1_240_2014
5 Linear Shafts-Both Ends Tapped with Wrench Flats / Both Ends Tapped with Cross-Drilled Hole SSFJZ30-657-M12-N16-SC0 2 Price check 1_149_2015
6 Flow Rate Control Valves/90 Deg. Elbow/Standard SPSNN10-2 4 Price check 2_1545_2015
7 Metal Collar - Flanged, Standard Grade / Precision Grade FTCLSS-V10-D20-H30-T5-L16.0 1 Price check 2_139_2014
8 Metal Washers - T Dimension Configurable, Precision Class WSSS30-10-2 1 Price check 2_114_2014
9 Ceramic Urethane Sheets UTSCMKA3-200-150 1 Price check 2_415_2014
10 Sensors for Cylinders MD11L3 4 Price check 2_1486_2014
  • The part list above only contains MISUMI parts.
    Part list download (CSV) includes MISUMI and third party components used in this example.
  • For price and shipping date see the Web Order System.
  • 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 dimensions of the MISUMI parts in the Data, which can be specifed at 1mm intervals, can be edited under historical data.
    6. The Data including the third-part components are made by the Company.

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