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No.000116 Pusher Overload Detection Mechanism

Pushing mechanism with overload prevention.

Miniature Linear Guides

Product name Miniature Linear Guides Standard Blocks, Light Preload, Precision Class L Configurable Type
Part number SSEBLZ13-58
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

Ensure running straightness.

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Available sizes

■Miniature Linear Guides Standard Blocks, Light Preload, Precision Class L Configurable Type

Material Hardness
440C Stainless Steel 56HRC-
Carbon Steel (Alloy Steel including SCM) 58HRC-

■Sizes and Dimensions.

Number of Blocks Block Width Block Length Overall Height Rail Length
1 17 23.6 8 40-130
20 30 10 35-275
27 33.9 13 45-470
32 42.4 16 70-670
40 50 20 100-700
2 17 23.6 x 2pcs. 8 70-130
20 30 x 2pcs. 10 95-275
27 33.9 x 2pcs. 13 120-470
32 42.4 x 2pcs. 16 150-670
40 50 x 2pcs. 20 160-700

* 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 0~+15
H Dimension Tolerance ±20
Pair variation of H 40
Tolerance of dims. W2 ±25
Pair variation of W2 40

(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

Operating Life Calculation for Linear Guides

Operating Life.
When the linear guide is loaded in linear reciprocating motion, scaly damages called flaking appear due to material fatigue as the stress works on the rolling elements (steel balls) and the rolling contact surfaces (rails) constantly.Total travel distance until the first flaking occurs is called Life of Linear Guides.
Rated life.
Rated life is the total travel distance that 90% of linear guides of the same type can reach, under the same conditions, with no occurrence of flaking damage.Rated life can be calculated with the basic dynamic load rating and the actual load applied on the linear guides, as shown below.
Load must be calculated before actually using linear guides. To obtain loads during linear reciprocating motion, it is necessary to fully consider vibrations and impacts during motion as well as distribution condition of the load applied to linear guides. So, it is not easy to calculation the loads.In addition, the factors as operating temperature also significantly affect the life. Considering these conditions, the above-mentioned calculation formula will 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: Applied Load (N).
Hardness factor (fH).

For Linear Guide applications, sufficient hardness is required for ball contact shafts. Inappropriate hardness causes less allowable load, resulting in shorter life.
Please correct the rated life with the hardness factor.

Temperature factor (fT)

When the temperature of linear guides exceeds 100 C, the hardness of guides and shafts will be reduced, and the allowable loads will also be reduced compared to being used at room temperature, causing a reduction of life.Please correct the rated life according to the temperature factors.
* Please use Linear Guides at within the heat resistance temperature ranges shown on product pages.

Contact factor (fC).

Table-1. Contact factor.

Number of blocks per rail Contact factor fC.

1 1.00
2 0.81
3 0.72
4 0.66
5 0.61

For actual applications, more than 2 blocks are generally used per shaft.In this case, the load applied to each block varies depending on machining precision and is not uniformly distributed.As a result, per-linear guide allowable load varies depending on the number of linear guides per rail. Please compensate the rated life with contact factors on table - 1.

Load factor (fW).

Table-2. Load factor.

Condition of Use fw
No shocks/vibrations,
low speed: 15m/min. or less
1.0-1.5
No significant shocks/vibrations,
medium speed: 60m/min. or less
1.5-20
With shocks/vibrations,
high speed: 60m/min. or more
2.0-3.5

To calculate load applied to the Linear Guides, in addition to object weight, it requires inertia force attributed to motion velocity or moment loads.However, it is difficult to calculation the load accurately due to potential vibrations and shocks caused by other element than repeated start-stop motions during reciprocating motion.Thus, table-2 load factor helps simplify the life calculation.

Applicable load calculation method.
When load is applied to the a block, convert moment load into applied load by the following formula.
  • 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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Spring Anchors

Product name Spring Anchors - Flat Head Screwdriver Type, with Groove
Part number SBSPOZ5-30
Features Posts for Tension Springs with Straight Slot Grooves available
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Select a groove type of spring which is capable of preventing the shift to the hook attachment of extension spring

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Available sizes

■Spring Anchors - Flat Head Screwdriver Type, with Groove

Material Surface Treatment Accessory
1045 Carbon Steel Black Oxide Nut one pc (JIS Class 1) 
Steel
303 Stainless Steel Nut one pc (JIS Class 1) 
304 Stainless Steel

■Sizes and Dimensions.

O.D. Overall Length Threaded Section Length
(overall length - shown below)
Screw Dia.
(Coarse)
Spring Latch Shaft Dia.
10 15 20 25 30 35 45 55 65
φ3 - - - - - 4 M3 φ1.8
φ4 - - - - 4.2 M4 φ2
φ5 - - - - 6 M5 φ3
φ6 - - - - 7 M6 φ3.6
φ8 - - - 7 M8 φ5
φ10 - - - - 7 M10 φ6
φ12 - - - - - - 8 M12 φ6.5

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Tension Spring

Product name Tension Spring - Standard Lengths
Part number AUA10-35
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

In order to set the abnormal load limit

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Available sizes

■Tension Spring - Standard Lengths

Load Type Material O.D. range Free length
range
Both ends hooked
Spring Steel (ASTM A228) 304 Stainless Steel S-shape 90 degree S
Ultra light load φ2 - 12 10 - 100 -
Light Load φ2 - 20 10 - 175
Light/Medium Load φ2 - 20 10 - 175
Medium Load φ2 - 24 10 - 200
Medium and Heavy Load - φ2 - 12 10 - 100 -
Heavy Load φ3 - 24 10 - 200

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Performance info.

■Load info. on tension spring.

Load Type Reference load (N)
Minimum Max.
Ultra light load 0.69 19.6
Light Load 1.86 78.45
Light/Medium Load 2.45 98.07
Medium Load 3.53 225.55
Medium and Heavy Load 6.47 83.36
Heavy Load 8.8 430.51

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Technical calculations

■Tension spring load calculations.

P = Pi + (k × F).

P: Load (N).
Pi: Initial Tension (N).
k: Spring Constant(N/mm).
F: Deflection (mm).

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IDEA NOTE Prevents overload on workpiece.

To simplify the overload detection, a spring is used.

  • 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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    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.
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       It is configured so that each sub-assembly unit can be used as it is or edited.

Application Overview

Purpose

  • [Purpose] To prevent overload on a workpiece during the ejection process.
  • The pushing mechanism which is advanced by a cylinder is placed on a linear guide. If an overload is applied to the pusher, the linear guide slides backwards and a spring is extended. A sensor is used to detect the overload.

Target workpiece

  • Shape: pallet.
    size: W40 x D40 x H60mm.
    weight: 0.5kg.

Design Specifications

Operating Conditions or Design Requirements

  • Pusher stroke: 100mm.
  • Distance from resting to overload detection sensor: 4.37mm.
  • Outer dimensions: W167 x D345 x H72mm.

Required Performance

  • Weight: 2kg.

Selection Criteria for Main Components

  • Cylinder.
    • Thrust of 12N or above.
  • Spring.
    • Spring that extends by approx. 5mm when a load of 1.0kg is applied.

Design Evaluation

Verification of main components

  • The extension of the spring when overloaded (distance between resting and sensor) is verified.
  • Extension of spring when overloaded.
    • Conditional value: workpiece weight m = 0.5kg, gravitational acceleration g = 9.8m/s ².
    • Friction coefficient μ= 0.5, spring constant k = 0.65N/mm, initial tension P1 = 2.06N.
    • Thrust F = mgμ= 0.5 × 9.8 × 0.5 = 2.45N.
    • Overload (twice F) F1 = 2.45 × 2 = 4.9N.
    • Extension of spring when overloaded b = (F1 - P1)/k = (4.9 - 2.06)/0.65 ≈ 4.37mm.

Other Design Consideration

  • To facilitate positioning at the extended position, an adjusting screw is used for the stopper.
  • The overload amount can be determined by changing the spring.

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 SSEBLZ13-170 1
2 Brackets For Air Cylinders CFKPM40 2
3 Air Cylinders MSCCN40-100 1
4 Floating Joints HLRDH10-18 1
5 Floating Joints FJDSW8-1.25-12 1
6 Linear Guides SSEBLZ13-58 1
7 Hex Posts SLSBWF7-45 2
8 Post For Tension Spring SBSPOZ5-30 1
9 Post For Tension Spring SBSPOZ5-25 1
10 Tension Springs AUA10-35 1
11 Photomicrosensor Currently not available 1
12 Locating Screw Stopper Blocks AJLTTS4-20 1
13 Stop Pins SSTFH7-4 1
14 Screw Stopper ANBN6-30 1
15 Sensors for Air Cylinders ME33L1 2
16 Flow Rate Control Valves SPSNL6-1 2
  • 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).
    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.

    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 Data including the third-part components are made by the Company.

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