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  • inCAD Library Home
  • > No.000181 Measures for the thrust load of a small-size motor shaft
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No.000181 Measures for the thrust load of a small-size motor shaft

Reducing the thrust load without using a coupling

Related Category

Thrust Needle Roller Bearings

Product name Thrust Needle Roller Bearings
Part number BA0619
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Suitable item to support thrust load

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Available sizes

■Thrust Needle Roller Bearings

Material: JIS-SUJ (Bearing Steel)

(Name No.) Thrust Needle Roller with Retainer Thrust Washer x 2
Hole Dia. O.D. Overall Thickness Hole Dia. O.D. Plate Thickness
Tolerance Tolerance Tolerance Tolerance Tolerance Tolerance
BA0414 Ø4 +0.14 /
+0.02
Ø14 -0.095 /
-0.365
2 0 / -0.01 Ø4 +0.2 /
+0.02
Ø14 -0.032 /
-0.302
1 +0.05 /
-0.05
BA0515 Ø5 Ø15 Ø5 Ø15
BA0619 Ø6 Ø19 -0.110 /
-0.440
Ø6 Ø19 -0.040 /
-0.370
BA0821 Ø8 +0.175 /
+0.025
Ø21 Ø8 +0.245 /
+0.025
Ø21
BA1024 Ø10 Ø24 Ø10 Ø24
BA1226 Ø12 +0.212 /
+0.032
Ø26 Ø12 +0.302 /
+0.032
Ø26
BA1528 Ø15 Ø28 Ø15 Ø28
BA1730 Ø17 Ø30 Ø17 Ø30
BA2035 Ø20 +0.25/
+0.004
Ø35 -0.120 /
-0.510
Ø20 +0.37 /
+0.04
Ø35 -0.050 /
-0.440
BA2542 Ø25 Ø42 -0.130 /
-0.520
Ø25 Ø42
BA3047 Ø30 Ø47 Ø30 Ø47

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Performance info.

■Load Information of Thrust Needle Roller Bearings

(Name No.) Hole Dia. O.D. Allowable Rotation Speed
(rpm)
(Reference)
Mass
(g)
(Reference)
Basic Dynamic
Load Rating
Ca kN
Basic Static
Load Rating
Coa kN
BA0414 Ø4 Ø14 5200 2.7 4.4 8
BA0515 Ø5 Ø15 5200 2.8 4.75 9.2
BA0619 Ø6 Ø19 4700 5 6.8 15.5
BA0821 Ø8 Ø21 4500 6 7.8 19.4
BA1024 Ø10 Ø24 4200 9 9.2 25.5
BA1226 Ø12 Ø26 3700 9.9 29
BA1528 Ø15 Ø28 3200 10 11.3 36
BA1730 Ø17 Ø30 3000 12 11.9 39.5
BA2035 Ø20 Ø35 2500 15 13.1 46.5
BA2542 Ø25 Ø42 2100 21 14.7 58
BA3047 Ø30 Ø47 1800 24 16.3 70

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Bearing Lock Nuts

Product name Bearing Lock Nuts/Square Type/Coarse Thread
Part number BNGS6
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Compact nut designed exclusively for tightening the bearings

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Available sizes

■Bearing Lock Nuts - Square

Screw Pitch Type Material Hardness Surface Treatment Accessory
Coarse

Fine
EN 1.0038 Equiv. - Black Oxide Set Piece
(Copper Alloy)
Set Screw (EN 1.7220 Equiv.)
EN 1.1191 Equiv. Thermal Refined 22 ~ 28HRC
EN 1.4301 Equiv. - - Set Screw (EN 1.4301 Equiv. )

■Sizes and Dimensions

Thread Dia. x Pitch Retainer
O.D.
External
Size
Overall thickness Set Screw
Dia.
Coarse Thread Fine Thread
M3 x 0.5 M3 x 0.35 Ø4 □10 5.5 M3
M4 x 0.7 M4 x 0.5 Ø5
M5 x 0.8 M5 x 0.5 Ø9 □11
M6 x 1.0 M6 x 0.75 Ø10 □12
M8 x 1.25 M8 x 1.0 Ø13 □14 6.5
M10 x 1.5 M10 x 1.0 Ø16 □17 8 M4
M12 x 1.75 M12 x 1.0 Ø17 □19
- M15 x 1.0 Ø21 □22 10
M16 x 2.0 -
- M17 x 1.0
M20 x 2.5 M20 x 1.0 Ø26 □30 13
M24 x 3.0 - Ø33 □35 15 M5
- M25 x 1.5
M30 x 3.5 M30 x 1.5 Ø39 □40 20 M6
- M35 x 1.5 Ø43 □45
M40 x 1.5 Ø48 □49 25
M50 x 1.5 Ø61 □63

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Gussets

Product name Gussets/Tapped Holes/Standard Holes Position/Standard Perpendicularity Type
Part number RBBW30-30-6
* Orange colored cells in the table below indicate the part numbers used in this example.

Selection criteria

Best suited for using as an economical reinforcing rib

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Available sizes

■Rib - Tapped Hole Fixed Dimensions

Precision Type Material Surface Treatment
Standard Grade
(perpendicularity: 0.05 / 100)

Precision Grade
(perpendicularity: 0.02 / 100)
EN 1.0038 Equiv. -
Black Oxide
Electroless Nickel Plating
EN AW-5052 Equiv. -
Clear Anodize
Black Anodize
EN 1.4301 Equiv. -

■Sizes and Dimensions

Precision Type Short side Long side Thickness / Tapped Hole Dia. Tapped
Hole Depth
30 40 50 60 80 100 EN 1.0038 Equiv. / EN 1.4301 Equiv. EN AW-5052 Equiv.
t6 t9 t12 t16 t6 t10 t12 t16
Standard Grade
(perpendicularity:
0.05 / 100)

Precision Grade
(perpendicularity:
0.02 / 100)
20 M3 M3 Diameter x 1.5
30 M3 M6 M3 M6
M5 M6 M5 M6
40 M5 M6 M5 M6
M6 M8 M6 M8
50 M5 M6 M5 M6
M6 M8 M6 M8
60 M5 M6 M5 M6
M6 M8 M6 M8
80 M5 M6 M8 M5 M6 M8
M6 M8 M6 M8
100 M5 M6 M8 M5 M6 M8
M6 M8 M6 M8

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IDEA NOTE Length in the motor shaft direction needs to be reduced.

By using the thrust bearing, the shaft is made capable to withstand the thrust load without coupling.

IDEA NOTE Use of a low thrust motor

By using the thrust bearing, load to the motor is reduced.

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    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.
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    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.
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Application Overview

Purpose

  • Purpose
    • Reducing the thrust load to the motor shaft without using coupling.
  • Operation
    • Worm gear and wheel are rotated by the motor, and the drum on the shaft wind the wire.

Points for use

  • Applicable to thrust load from one direction only.

Target workpiece

  • Shape: Block
  • Size: W40 x D40 x H25mm
  • Weight: 0.3kg

Design Specifications

Operating Conditions or Design Requirements

  • Up and down stroke: 30mm
  • External size: W123 x D125 x H92mm

Required Performance

  • Load: 3N

Selection Criteria for Main Components

  • A motor with thrust load of 0.8N is selected to pull up a workpiece of 0.3kg.

Design Evaluation

Verification of main components

  • Select the bearing to withstand the load weight.
  • Thrust bearing selection
    • Conditional values: Diameter of the wire winding part of the drum d1 = 28mm, pitch circle diameter of the worm wheel d2 = 30mm, motor rotational speed z1 = 1200rpm, workpiece mass W = 0.3kg, gravitational acceleration g = 9.8m/s², work movement length l1 = 30mm, friction coefficient on the tooth surface µ = 0.0167, tooth rectangular pressure angle a = 20°, worm gear advance angle y1 = 3.58°, pitch circle diameter of worm gear d3 = 16mm, worm gear rotational speed q1 = 1200mm, basic load rating of thrust bearing c1 = 6.8kN
    • Number of revolution necessary for the drum to wind the workpiece n1 is given as follows:
      n1 = d1 x π / l1 = 28 x π / 30 = 2.93
      Motor rotation time at that time is given by
      t1 = d2 x n1 x (60 x z1) = 30 x 2.93 x (60 x 1200) = 4.40t
    • Net power H1 applied to the worm gear is given by
      H1 = W x g x l1 / t1 = 0.3 x 9.8 x 30 / 4.40 = 0.02N = 2.72 x 10-5 PS
    • Apparent friction angle on the tooth surface p1 is given by
      p1 = tan - 1 (µ) = tan - 1 (0.0167) = 0.957°
    • Axial thrust load F1 of the worm gear is given by
      F1 = F2 / tan (y + p) = 1.432 x H1 x 106 / {tan (y1 + p1) x d3 x q1} x g
      = 1.432 x 2.72 x 10-5 x 106 / {tan (3.58 + 0.957) x 16 x 1200} x 9.8
      = 0.25N < 6.8kN = c1
      ⇒No problem

Other Design Consideration

  • The bearing, instead of bush, is used although operation turns into low speed rotation because of the worm gear and wheel drive.
  • Mounting should be conducted so that no gap exists between the motor bracket, bearing, and the worm gear.

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 Needle Bearing BA0619 1
2 Rotary Shaft SSFRHMS8-82.0-F15.0-B8-P6-T15.0-S8-Q6-SC42 1
3 Bearing Lock Nuts BNGS6 2
4 Ball Bearing B636ZZ 2
5 Ribs RBBW30-30-6 2
6 Hex Socket Set Screws MSSU4-5 1
7 Set Screws Dimple MSSU5-6 1
  • 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.


    This data is utilized in order to list more useful application examples in the future.

    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 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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