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inCAD Library

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No.000232 Positioning Mechanism
Good IDEA!
46

Manually positioning mechanism.

Relevant category

Lead Screw

Lead Screw
Product name Lead Screws - Straight
Part number MTSTR16-474
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria | Available sizes | Accuracy Info | Technical calculations

Selection criteria

Converts rotary to linear motion.

Available sizes

■Lead Screws - Straight

Material Surface Treatment Compatible lead screw nut
Type Material
1045 Carbon Steel - Right-hand Thread Brass
Black Oxide
303 Stainless Steel -

■Sizes and Dimensions

Screw shaft nominal Pitch Overall Length
1mm Increment 100 mm Increments
8 1.5 50?500 -
10 2 80?1000
12
14 3
16 100?1200 1300～2000
18 4 150?1200
20
22 5
25
28
32 6 200?1200
36
40
50 8 -

* Manufacturable ranges vary slightly depending on material or screw shaft nominal Dia. Please see the product pages for details.

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Accuracy Info

■Lead screw: Screw shaft runout tolerance (Max.)

(mm)

Shaft Dia. Screw shaft length
-125 126
-200 		201
-315 		316
-400 		401
-500 		501
-630 		631
-800 		801
-1000 		1001-1250 1251-1600 1601-2000
φ8 0.1 0.14 0.21 0.27 0.35 - - - - - -
φ10-12 0.09 0.12 0.16 0.21 0.27 0.35 0.46 0.58 - - -
φ14 0.09 0.11 0.13 0.16 0.2 0.25 0.32 0.42 - - -
φ16 0.09 0.11 0.13 0.16 0.2 0.25 0.32 0.42 0.55 0.73 1
φ18-20 - 0.11 0.13 0.16 0.2 0.25 0.32 0.42 0.55 0.73 1
φ22-32 - 0.09 0.11 0.13 0.16 0.19 0.23 0.3 0.38 0.5 0.69
φ36-50 - 0.11 0.11 0.11 0.13 0.15 0.17 0.22 0.27 0.34 0.46

■Lead Screw Accuracy Standards

Item Content
Allowable Dimension and Tolerance JISB0217 0218
Screw Accuracy 7e Class
Nut Accuracy 7H Class
Single Pitch Error ±0.02
Accumulated Pitch Error ±0.15/300mm
Length tolerance JISB0405(Medium class)
Screw shaft end DIA. tolerance h7

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Technical calculations

■Lead screw・Lead screw nut selection steps

Calculate Contact Pressure P and Sliding Velocity V based on conditions of use to check that no abnormal wear will occur.
Plot the calculated P and V values against the PV value graph and confirm the intersection.
If the intersection falls inside of line (1) and (2), it is determined that abnormal wear would not occur.

Determine conditions of use.

↓

Lead screw・lead screw nut temporary selection

↓

Calculate (1) Contact Pressure P, (2) Sliding Velocity V,
Confirm if it is inside of (1) and (2) on PV value graph.

↓

Calculate screw efficiency η and load torque T.

(Axial load, rotational speed)


(Lead screw・lead screw nut material)

↑

(If not good)

PV Value graph

  • ① Steel (lubricated) - Brass
  • ② Steel (unlubricated) - Resin
PV Value graph

(1) Contact surface pressure P (N/mm2)

Contact Pressure P
  • Fs: Shaft axial load(N)
  • F 0 ：Allowable Dynamic Thrust (N)　-> Nuts for Lead Screw Specifications
    Thrust when contact surface pressure of the lead screw and nut becomes 9.8 (N/mm2).
  • α：9.8(Brass)　0.98(Resin)

(2) Sliding speed V (m/min)

すべり速度V
  • d2: Screw shaft effective Dia. -> From lead screw specifications table
  • d: Screw Shaft Lead Angle (degree)　-> Lead Screw Specifications
  • n: Screw shaft rotation per minute (nim-1)

(3) Screw efficiency η

Screw efficiency η
  • μ: dynamic friction coefficient
  • d: Screw shaft lead angle (deg.)

<Dynamic friction coefficient reference value >

Thread Shaft Nuts for Lead Screws Dynamic friction coefficient μ
Steel (Lubricated) Brass 0.21
Steel (Unlubricated) Polyacetal / PPS Resin
with Sliding Property		 0.13

(4) Load torque (N・cm)

Load torque
  • Fs: Shaft axial load
  • η: Screw efficiency
  • R: Lead (cm)

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Aluminum Knurled Handwheel

Aluminum Knurled Handwheel
Product name Knurled Handwheels - Aluminum
Part number HOKW63
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria ｜ Available sizes

Selection criteria

Consider the operability, and select the one with appropriate O.D.

Available sizes

■Knurled Handwheels - Aluminum

Handle Handle Handle Thread Tapped
Material Surface Treatment Material Material Surface Treatment
5056 Aluminum Alloy Black anodize Nylon 6(Black) 12L13 Carbon Steel Black Oxide Tapped Hole
Without Tap
Clear Anodize Nylon 6(White) Tapped Hole
Without Tap
304 Stainless Steel - 304 Stainless Steel 304 Stainless Steel - Tapped Hole
Without Tap

■Sizes and Dimensions

Knob
O.D. 		Shaft Bore Dia. Handle Height Handle Set Screw Dia.
(Black Handle, Black Grip,
Tapped) 		Mounting height Width Diameter Length
φ40 φ8 φ6・φ8 25 12 φ13 18.8 M5
φ50 φ10 φ8・φ10 28 13
φ63 φ12 φ10・φ12 32 14 φ14 20.8
φ80 φ16 φ12・φ16 40 15 φ16 23.8 M6

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IDEA NOTE Simplified positioning (alignment) mechanism

Linear positioning is performed by utilizing a lead screw. Lead screw converts rotary motion from the handwheel to linear movement.

  • Terms of use of 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://th.misumi-ec.com/ (hereinafter referred to as the "Website") operated by MISUMI (THAILAND) CO., LTD. (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.
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    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.
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    Customers or users of the Data, are prohibited from the following acts regarding the Data, in whole or in part:
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    10．Miscellaneous
    These Terms and any disputes arising in connection therewith shall be exclusively governed by and construed in accordance with the laws of Thailand, without regard to its conflicts of law principles. The authorized courts in Thailand shall have exclusive jurisdiction to adjudicate any dispute arising in connection with these Terms.

    Revised: 16th November, 2025

    CAD Download (Unit Assembly)

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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

  • Workpiece is roughly set on the manual presser. Using urethane mold bearings and lead screw mechanism, workpiece can be aligned against the presser.

Points for use

  • Manual unit is operated by aluminum knurled handwheel mounted on lead screws.

Target workpiece

  • Material: Resin
  • Shape: thin plate
  • Outer dimensions: W140 x D165 x t3 mm
  • Workpiece weight: 150g

Design Specifications

Operating Conditions or Design Requirements

  • Alignment

    Refers to arranging objects in a line, or refers to adjustments made for that purpose.

    stroke: 19.5mm (for different workpieces, it can be extended up to 45 mm)
  • Outer dimensions: W183 x D430 x H136 mm

Required Performance

  • Required accuracy: 0.1 mm

Selection Criteria for Main Components

  • Lead screw/nut
    • The rotary movement is converted to linear movement for manual positioning.
  • Urethane Molded Bearings
    • Selected to prevent workpieces from being damaged.

Design Evaluation

Other Design Consideration

  • For different size workpieces, a scale can be added to visually confirm proper positioning.
  • When pushing a workpiece against the presser, the operator has to confirm workpiece final position and avoid excessive handwheel rotation.

Explore Similar Application Examples

Page - / -

Part List

No. Part Name Sample Picture MISUMI Part Number
(click the Part Number below for details) 		Quantity
2 Resin Lead Screw Nuts MTSFJR16 1
3 Aluminum Knurled Handwheels HOKW63 1
4 Bearing Holder HBRS12 2
5 Linear Shaft PSSFG15-395 2
6 Shaft Collars SSCSM15-12 4
7 Shaft Collars SSCSPD15 4
8 Oil Free Bushings JZB15-10 4
9 Cantilever Shafts SETK10-26-M5-N4 2
10 Ball Bearing UMSB6-20 2
11 Clamp Levers CLMS5-20-B 1
12 Point Plate PPS12 1
13 Scale Tape TMEPN-2000 1
14 Hex Posts SLSBWRK10-100 6
15 Socket Head Cap Screws-with Washer SCBS4-15 4
16 Socket Head Cap Screws-with Washer SCBS5-20 14
17 Socket Head Cap Screws-with Washer SCBS5-25 8
18 Socket Head Cap Screws-with Washer SCBS6-20 10
19 Phillips Pan Head Screws - with Washer Set SCBJ2-5 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 of 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://th.misumi-ec.com/ (hereinafter referred to as the "Website") operated by MISUMI (THAILAND) CO., LTD. (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 Thailand, without regard to its conflicts of law principles. The authorized courts in Thailand shall have exclusive jurisdiction to adjudicate any dispute arising in connection with these Terms.

    Revised: 16th November, 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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