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No.000172 Space-Saving Long-Stroke Mechanism

Speeding up with long stroke

Compact Cylinders

Product name Compact Cylinders
Part number MSCCN20-50
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Effective for building a small-sized linear motion system

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Available sizes

■Compact Cylinders Double Acting Standard Stroke Type

Tube
I.D.
External
Size
Rod Tip Screw Stroke St Body Length
(+ St shown below)
Rod Tip
Length
Screw Type Dia. -
Pitch
5 10 15 20 25 30 35 40 45 50 75 100
Ø12 □25 Tapped M3 x 0.5 - - - - - - 22 3.5
Ø16 □29 M4 x 0.7 - - - - - -
Ø20 □36 M5 x 0.8 - - 29.5 4.5
Ø25 □40 M6 x 1.0 - - 32.5 5
Ø32 □45 M8 x 1.25 - - 33 7
Ø40 □52 39.5
Ø50 □64 M10 x 1.5 - 40.5 8
Ø63 □77 - - - - - - - - 46
Ø12 □25 Threaded M5 x 0.8 - - - - - - - - - 22 14
Ø16 □29 M6 x 1.0 - - - - - - - - - 15.5
Ø20 □36 M8 x 1.25 - - - - - - - - - 29.5 18.5
Ø25 □40 M10 x 1.25 - - - - - - - - - 32.5 22.5
Ø32 □45 M14 x 1.5 - - - - - - - - - 33 28.5
Ø40 □52 - - - - - - - - 39.5
Ø50 □64 M18 x 1.5 - - - - - - - 40.5 33.5
Ø63 □77 - - - - - - - - 46

* Sensors are sold separately

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Selection steps

■Selection procedure of compact cylinders (See "Technical Information" shown below for details.)

1. Define various conditions of the load

2. Calculate cylinder output (In case of double acting type)

3. Determine the tube I.D.

4. Determine the theoretical reference speed

5. Verify the cylinder's cushion mechanism

6.Verification of lateral load which is supplied to the cylinder

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Performance info.

■Load Information of Compact Cylinders

Min. Operating Pressure: 0.1 MPa

Max. Operating Pressure: 1.0 MPa

Theoretical Output (N) :

Tube I.D. Operation
Direction
Operating Pressure (MPa)
0.4 0.5
Ø12 Outstroke 45 57
Instroke 34 42
Ø16 Outstroke 80 101
Instroke 60 75
Ø20 Outstroke 126 157
Instroke 94 118
Ø25 Outstroke 196 245
Instroke 151 189
Ø32 Outstroke 322 402
Instroke 241 302
Ø40 Outstroke 503 628
Instroke 422 528
Ø50 Outstroke 785 982
Instroke 660 825
Ø63 Outstroke 1247 1559
Instroke 1121 1402

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Miniature Linear Guides

Product name Miniature Linear Guides/Short Block
Part number SE2BSZ10-115
Features Compliant with the industry standard specifications. 20% more compact than standard blocks.
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Effective for building a small-sized linear motion system

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Available sizes

■Miniature Linear Guides (short blocks, slight clearance)

Material Hardness
Stainless Steel (EN 1.4125 Equiv.) 56HRC -
Carbon steel (Alloy Steel including SCM) 58HRC -

■Sizes and Dimensions

Number of Blocks Block Width Block Length Overall Height Rail Length
1 17 19.6 8 40 - 130
20 22.9 10 35 - 275
27 27 13 45 - 470
32 32.7 16 70 - 670
2 17 19.6 x 2pcs. 8 55 - 130
20 22.9 x 2pcs. 10 75 - 275
27 27 x 2pcs. 13 95 - 470
32 32.7 x 2pcs. 16 110 - 670

* Please see the product pages for details of selectable sizes.

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Selection Steps

■Miniature linear guide selection steps

Determination on Operating Conditions
(Moving mass, feed rate, motion pattern, life)

Temporary selection of linear guide specifications
(Block type, overall height, rail length are temporarily selected according to the conditions of use.)

Basic safety check
  • ●Allowable Load
  • ●Operating Life
  • ●Preload

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Accuracy Info

■Preload and Accuracy Reference (Standard Blocks / Light Preload / High Grade)

(µm)

Radial Clearance -3 ~ 0
H Dimension Tolerance ±20
Pair variation of H 15
Tolerance of dims. W2 ±25
Pair variation of W2 20

(µm)

Rail Length (mm)
- 80 81 - 200 201 - 250 251 - 400 401 - 500 501 - 630 631 - 700
Running Parallelism 3 7 9 11 12 13.5 14

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Technical Calculations

■Linear guide life calculations

●Life
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 is the "Life" of the linear system.
●Rated life
Rated life is a total distance 90% of linear guides reach without flaking when a group of the same guides are run under the same condition. The rated life can be calculated with basic dynamic load rating and the load applied on the guides as follows.
When using linear guides, load calculations are initially needed. It is not easy to calculate the loads during linear motion due to vibrations and shocks, as well as load distribution on the guides. Furthermore, operating environment temperature has large effect on life. When these conditions are taken in consideration, the calculations would be as follows.
  • L: Rated life (km)
  • fH: Hardness Factor (See Fig-1)
  • fT: Temperature Factor (See Fig-2)
  • fC: Contact Factor (See Table-1)
  • fW: Load Factor (See Table-2)
  • C: Basic Dynamic Load Rating (N)
  • P: Applicable load (N)
●Hardness factor (fH)

In using linear guides, the shaft that balls contact must have sufficient hardness, If adequate hardness cannot be obtained, load rating decreases and life will be reduced as a result.

●Temperature factor (fT)

When the temperature of linear guides exceed 100°C, hardness of blocks and rails will be reduced, causing reduction of life. Please compensate the life rating with temperature factor. 
* Please use linear guides within temperature shown on product pages.

●Contact factor (fC)

Table - 1. Contact factor

Number of blocks installed on one rail and contact factor fC

1 1.00
2 0.81
3 0.72
4 0.66
5 0.61

In general, it is common to use 2 or more blocks on 1 rail. In such case, load applicable on each block would not be uniform due to machining variations. As the result, allowable load rating on each block would vary depending on the number of blocks used per rail. Please compensate the life rating with contact factor shown on Table - 1.

●Load factor (fW)

Table - 2. Load factor

Application condition fw
No external shocks or vibrations and
speed is low 15m/min or less
1.0 - 1.5
No significant shocks or vibration and
med. speed 60m/min or less
1.5 - 20
External shocks and vibrations exist 
and the speed is high 60m/min or over
2.0 - 3.5

When calculating loads applicable on linear guides, other than the weight of the object, inertial force due to motion speeds, moment loads, and variations of each over time must also be obtained accurately. However, accurate calculation would be difficult due to repeated starts and stops and various shocks and vibrations. Therefore, the Load Factors shown in Table - 2 are used to simplify the life calculations.

●Applicable load calculation method
When moment loads apply a block, use the following formula to convert the moment load to applicable load.
  • P: Applicable Load (N)
  • F: Downward load (N)
  • Co: Static Load Rating (N)
  • MA: Allowable Static Moment - Pitching Direction (N・m)
  • MC: Allowable Static Moment - Rolling Direction (N・m)
  • Lp: Load point distance (m) in pitching direction
  • Lr: Load point distance (m) in rolling direction

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Floating Joint

Product name Floating Joints -Extra Short Threaded Stud Mount/Threaded
Part number FJCMX5-0.8
Features Floating joints that can be used where there is little distance between cylinders and moving objects.
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Suitable for absorbing deviations in the radial direction.

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Available sizes

■Floating Joint Extra Short Lateral Misalignment Angular Misalignment Tolerant Threaded Stud Mount - Threaded (for Tapped Cylinder)

Body / Cover Joints Spring Washer
Material Surface Treatment Material Surface Treatment Hardness Material Material Surface Treatment Hardness
EN 1.1191 Equiv. Black Oxide EN 1.1191 Equiv. Black Oxide 35 - 45
HRC
EN 1.4301 Equiv. - WPB EN 1.4301 Equiv. Nitriding Treatment 600HV -
EN 1.4301 Equiv. - EN 1.4125 Equiv. -

■Sizes

Cylinder Mounting Side Output Side Allowable Misalignment
[U]
Allowable Angular Deviation
[A]
Body
Thickness
Body
Hex size
Overall Length
Screw Dia. - Pitch thread length Screw Dia. - Pitch thread length
M5 - 0.8 6 M8 - 1.25 8.5 0.5 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

< Allowable lateral misalignment U and allowable angular misalignment A >

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IDEA NOTE The long stroke is achieved by the combined use of air cylinders and linear guides and the parallel arrangement of the cylinders. In this way, the height in the escaped state is reduced and this leads to space-saving

In achieving a long stroke by means of two cylinders, using a linear guide in combination and arranging the cylinders in parallel, the height in the escaped state is reduced leading to space-saving.

IDEA NOTE Increased speed achieved through combined use of air cylinders

By simultaneously operating air cylinders, the operation time is reduced compared to that when performing a long stroke with a single air cylinder.

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    1. CAD Data
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    3. Copyright
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    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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    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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       Each sub-assembly unit can be used as it is or can be edited.

Application Overview

Purpose

  • Purpose
    • The lift stroke mechanism retracts to a height below the roller conveyor height (H = 162mm) and advances upward by 100mm up to the processing position when receiving and passing a workpiece on the pallet.
  • Operation
    • By using air cylinders and linear guides in combination, the length of the mechanism in the movement direction is shortened while it moves upwards through a long stroke.

Target workpiece

  • Shape: box shape workpiece
  • Size: W100 x D80 x H50mm
  • Weight: 1kg

Design Specifications

Operating Conditions or Design Requirements

  • Ascending / descending stroke: 100mm
  • Cylinder stroke: 50mm
  • Tube inner diameter: Ø20mm
  • Cylinder output: 126 x 70%N (Applied pressure 0.4MPa)
  • Outer dimensions: W230 x D105 x H157 (H245 when ascended)mm

Required Performance

  • Running parallelism: 15 x 2 = 30µm
  • Allowable Load: 60N

Selection Criteria for Main Components

  • Air Cylinder
    • Stroke of 50mm or longer and output of 30N or above

Design Evaluation

Verification of main components

  • A cylinder is selected so that the force required for raising the workpiece is obtained.
  • Ascending output
    • Conditional value: target workpiece mass: M1 = 1kg, ascending structure mass: M2 = 2kg, ascending stroke: L = 100mm, gravitational acceleration g = 9.8m/s², air pressure: a = 0.4MPa, cylinder load factor: η = 70% = 0.7
    • Load applied during ascending: W = W1 + W2 = M1 x g + M2 x g = 1 x 9.8 + 2 x 9.8 = 9.8 + 19.6 = 29.4N
    • Required cylinder thrust: P = W / η = 29.4 / 0.7 = 42N
      ⇒A cylinder with a cylinder inner diameter of Ø12mm or higher is selected.
    • Stroke: L = 100mm, stroke required for each cylinder: L' = L / 2 = 100 / 2 = 50mm
      ⇒A standard cylinder with a stroke of 50mm and an inner diameter is Ø20mm is selected.
    • Based on the thrust of a cylinder with a Ø20 inner diameter mm: P', the allowable ascending load: W' is verified.
      P'= π / 4 x 20² x 0.4 = 126N
      W' = P' x η - W2 = 126 x 0.7 - 19.6 = 68.6N
      ⇒Allowable ascending load: W' = 68.6N

Other Design Consideration

  • When selecting a 100-mm stroke, the cylinder tube inner diameter as well as outer dimensions become larger. 
    A linear guide that needs to have a length equivalent to the stroke + the guide also becomes longer, making it difficult to be installed in a structure that necessitates escaping. Therefore, this mechanism is effective for space-saving.

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 Air Cylinders MSCCN20-50 2
2 Flow Rate Control Valves MNSPS6-M5 4
3 Sensors for Air Cylinders MD13L1 4
4 Linear Guides SE2BSZ10-115 4
5 Floating Joints FJCMX5-0.8 2
6 Workpiece Guide WGLN-20-10-12 4
  • 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).
  • You will find information on price and shipping days, in the Online Quote and 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.
    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.

    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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