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inCAD Library

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  • Helpful application examples for mechanical engineers.

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No.000044 Slide Positioning Mechanism
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3

Slide positioning mechanism indexed with a ball plunger.

Relevant category

Miniature linear guide

Miniature linear guide
Product name Miniature Linear Guides Standard Blocks, Light Preload, Precision Class L Configurable Type
Part number SSE2B13-470
Features The most basic type among all the industry standard-compliant blocks.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Selection steps | Accuracy Info | Performance info. | Technical calculations

Selection criteria

Linear guide is selected for accurate sliding.

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Available sizes

■Miniature linear guide (Standard block, Light preload, High grade, 2-blocks)

Material Hardness
Stainless steel (440C Stainless Steel) 56HRC-
Carbon steel (SCM, etc. alloy) 58HRC-
Overall height Rail length
6 70-100
8 70-130
10 75-275
13 95-470
16 110-670
20 160-700

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Selection steps

■Miniature linear guide selection steps

Determine the app. Conditions
(Moving body speed, feed rate, motion pattern, Life)

↓

Temporary selection of linear guide specifications
(Temporarily select block type, height,
rail length based on the application condition)

↓

Confirming basic safety
  • Load capacity
  • Life
  • Preload

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Accuracy Info

Preload and accuracy reference (Standard block · Light preload · High grade)

(μm）

Radial clearance -3～0
Dimension tolerance of H ±20
Pair variation of H 15
Dimension tolerance of 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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Performance info.

Load rating of linear guides (Standard block ・Light preload ・High grade)

Overall height Basic load rating Allowable static moment
C (Dynamic) kN C0 (Static) kN MA
N・m		 MB
N・m		 Mc
N・m
6 0.3 0.6 0.8 0.8 1.5
8 0.9 1.5 4.1 4.1 5.2
10 1.5 2.5 5.1 5.1 10.2
13 2.2 3.3 8.8 9.5 16.1
16 3.6 5.4 21.6 23.4 39.6
20 5.2 8.5 48.4 48.4 86.4

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Technical calculations

Linear guide life calculations

Life
When linear guides operate in linear motion while supporting loads, repeated stresses apply on the rolling elements (balls) and raceways (rails), eventually causing scale-like flaking due to material fatigue. The total run distance until this flaking appears is defined as linear guide's "Life".
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.
Please compensate the life value with the hardness factor.

Temperature factor (fT)

When the temperature of linear guides exceed 100℃, 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 the resistant temperature range 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)
  • C0: 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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Ball plunger

Ball plunger
Product name Ball Plungers -Roller-
Part number BPRM6
Features The combination structure of the main ball and the sub ball facilitates smooth rotation of the ball.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Risk info. | Available sizes | Mechanism Info. | Performance info.

Selection criteria

Popular item that is used as a means of table indexing and position retention.

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Risk info.

Retaining force, durability

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Available sizes

■Ball plunger (Roller type)

Ball material Body Ball Sub-ball Spring Usable temperature
Material Material Hardness Material Hardness Material
Metal 302HQ Stainless Steel 440C Stainless Steel 55HRC- 440C Stainless Steel 55HRC- 631 Stainless Steel −30〜100℃
Resin Polyacetal − −30〜80℃

■Sizes and Dimensions

Thread DIA. (Coarse) Ball Body length
DIA. Stroke
M6 φ3 0.8 13
M8 φ4 1.3 15
M10 φ5 1.6 16
M12 φ7.1 2.3 20
M16 φ9.5 3.1 25

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Mechanism Info.

■Ball plunger (Roller type) structure explanation

The structure with sub-balls below the main ball allows for smooth main ball rotation.

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Performance info.

■Spring load of ball plunger (Roller type) (N)

Thread DIA. (Coarse) Load (N)
min. max.
M6 8.1 29.6
M8 12.6 39.8
M10 13.5 44.4
M12 16.1 46.9
M16 26.1 88.2

＊Min. load is the initial load, max. is when the ball is depressed fully.

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Devise stand

Devise stand
Product name Device Stands - Round Flanged, Pipe
Part number SCSTN15-200
Features Stand Set of Low Cost and Standard Shape.
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Accuracy Info

Selection criteria

Since vertical position can be adjusted easily where accuracy is not needed.

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Available sizes

■Devise stand (Round flange, through hole type)

Post Bracket Bracket
No dowel hole With dowel hole
Material Surface treatment Material Surface treatment Post
Bar Pipe Bar Pipe
1045 Carbon Steel − Cast Iron Class No.35 Black oxide
or
phosphate coating 		○ ○ ○ ○
1045 Carbon Steel Electroless nickel plating ○ ○ ○ ○
304 Stainless Steel − ○ ○ ○ ○
1045 Carbon Steel Electroless nickel plating Electroless
nickel plating 		○ ○ − −
1045 Carbon Steel ○ ○ − −
304 Stainless Steel − ○ ○ − −

(Induction hardening: 58HRC-, Depth 1.0 - 1.5)

■Sizes and Dimensions

Post DIA. Overall height Flange O.D. Flange height Flange thickness (Pipe I.D.) (Dowel hole DIA.)
φ10 50-250 φ56 35 12 φ6 φ6
φ12 50-300 φ68
φ15 75-350 φ75 40 φ10
φ20 75-400 φ86 45 12 φ11.7
φ25 75-450 φ100 50 φ15.2 φ8
φ30 100-450 φ106 60 φ16
φ35 125-500 φ118 70 15 φ20.1 φ10
φ40 150-500 φ125 80 φ22.7
φ50 200-600 φ140 100 φ30.8

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Accuracy Info

■Accuracy info. of devise stand (Round flange, through hole type)

Post Bracket (Dowel hole)
O.D. O.D. tolerance Shaft bore DIA. Bore DIA. tolerance Hole DIA. Hole DIA. tolerance
φ10 -0.005/-0.014 φ10 +0.015/0 φ6 +0.012/0
φ12 -0.006/-0.017 φ12 +0.018/0
φ15 φ15
φ20 -0.007/-0.020 φ20 +0.021/0
φ25 φ25 φ8 +0.015/0
φ30 φ30
φ35 -0.009/-0.025 φ35 +0.025/0 φ10
φ40 φ40
φ50 φ50

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IDEA NOTE Devising of ball plunger engaging position

The mating part of the ball plunger has the notches located slightly lower than the center of the parts height. Regardless of heat treating, when the notches are worn, this part can be turned upside down (use locating dowel pins, etc. to ensure the repeatability) to regain the initial condition.

IDEA NOTE Dual role pins

Locating pins are used to locate the linear guide rail, to prevent the block from falling off.

IDEA NOTE 樹脂素材のカラーを利用

金属粉を出さないようにする材質選定

  • 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).
    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 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

  • Simple manual positioning of samples.

Target workpiece

  • Example: electronic circuit components.
  • Size: W29 x D29 x H4.5mm

Design Specifications

Operating Conditions or Design Requirements

  • External dims: W220 x L495 x H210mm

Required Performance

  • Load: 8-10N (approx. 800g - 1kg)
  • Required force to move carriage: 16-18N (approx. 1.6 - 1.8kg) to initiate motion, after which only approx. 300g is needed to maintain motion.

Selection Criteria for Main Components

  • Linear guide
    • Selected for its load bearing capacity and smooth guidance of linear motion.

Design Evaluation

Verification of main components

  • Calculation for ball plunger retaining force
    • One side of the V groove is 45 degrees, making plunger setting force and operating force the same.
    • The retaining force with plunger set for 0~0.1mm stroke (Almost zero-touch) is 8.1~10.1N
    • Max. load to overcome the V groove when set is 0.2mm, so 16~19N.

      ⇒ Select BPRM6 since required retaining force is within its load capacity.

Other Design Consideration

  • Adjust the pitch distance between notches on the carriage to control the positioning increments.

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 Linear Guides SSE2B13-470 2
2 Locating Pins JPSB5-3 6
3 Dowel Pins MSHS3-8 2
4 Pull Handles UWANZ10-80-27-G 1
5 Ball Plungers -Roller- BPRM6 1
6 Welded Steel Stands SCSTN15-200 1
7 Dowel Pins MSHS3-10 6
  • 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).
    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 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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