(!) Since support from Microsoft will end on January 14 2020, Windows 7 user might not be able to use MISUMI website effectively. Please consider to update your system as ‘MISUMI Website system requirement’.
- inCAD Library Home
- > No.000061 Retaining Mechanism
No.000061 Retaining Mechanism
72
72
An O-ring is used for part retention.
Relevant category
O-Rings
| Product name | O-Rings - P Series |
|---|---|
| Part number | NPA15 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Used to create friction between assembly components.
Risk Info.
Wear and degradation can reduce retaining force
Available sizes
■O-Rings - P Series
| Material | Hardness (JIS Hs) | Color | Operable Temperature Range | JIS Symbol | Usage |
|---|---|---|---|---|---|
| Nitrile Rubber | 70±5 | Black | －30-100℃ | Class1A | Mineral Oil Resistant |
| Nitrile Rubber | 90±5 | Black | －25-100℃ | Class1B | Heat Resistant |
| Silicon Rubber | 50±5 | Milky White | －50-200℃ | − | |
| Silicon Rubber | 70±5 | Navy | －50-200℃ | Class4C | Heat Resistant |
| Fluororubber | 70±5 | Black | －15-200℃ | Class4D | |
| Fluororubber | 90±5 | Black | －15-200℃ | − | Heat Resistant |
| Ethylene Propylene Rubber | 70±5 | Black | －45-130℃ | − | Weather Resistant |
Sizes and Dimensions(Excerpt)
| JIS Nominal Number | Ring I.D. | Ring Wire Dia. | Mating Side Dia. | |
|---|---|---|---|---|
| Against O-ring | ||||
| Internal Contact | External Contact | |||
| P10 | φ9.8 | φ1.9 | φ10 | φ13 |
| P10A | φ9.8 | φ2.4 | φ10 | φ14 |
| P11 | φ10.8 | φ11 | φ15 | |
| P11.2 | φ11 | φ11.2 | φ15.2 | |
| P12 | φ11.8 | φ12 | φ16 | |
| P12.5 | φ12.3 | φ12.5 | φ16.5 | |
| P14 | φ13.8 | φ14 | φ18 | |
| P15 | φ14.8 | φ15 | φ19 | |
| P16 | φ15.8 | φ16 | φ20 | |
| P18 | φ17.8 | φ18 | φ22 | |
| P20 | φ19.8 | φ20 | φ24 | |
| P21 | φ20.8 | φ21 | φ25 | |
| P22 | φ21.8 | φ22 | φ26 | |
| P22A | φ21.7 | φ3.5 | φ22 | φ28 |
| P22.4 | φ22.1 | φ22.4 | φ28.4 | |
| P24 | φ23.7 | φ24 | φ30 | |
| P25 | φ24.7 | φ25 | φ31 | |
| P25.5 | φ25.2 | φ25.5 | φ31.5 | |
| P26 | φ25.7 | φ26 | φ32 | |
| P28 | φ27.7 | φ28 | φ34 | |
| P29 | φ28.7 | φ29 | φ35 | |
| P29.5 | φ29.2 | φ29.5 | φ35.5 | |
| P30 | φ29.7 | φ30 | φ36 | |
* Please see the product pages for other diameter rings.
Accuracy Info
■Accuracy of O-rings P Series
Ring Wire Dia. Tolerance:
| Wire Dia. | Tolerance |
|---|---|
| φ1.9 | ±0.08 |
| φ2.4 | ±0.09 |
| φ3.5 | ±0.10 |
| φ5.7 | ±0.13 |
Parting Surface Burr Height: 0.1 or less
Parting Surface Burr Width: 0.15 or less
Ring I.D. Tolerance:
| JIS Nominal Number | Ring I.D. | Tolerance | ||
|---|---|---|---|---|
| Nitrile | Silicon Ethylene | Fluorine | ||
| P10 | φ9.8 | ±0.17 | ±0.25 | ±0.20 |
| P10A | φ9.8 | |||
| P11 | φ10.8 | ±0.18 | ±0.27 | ±0.21 |
| P11.2 | φ11 | |||
| P12 | φ11.8 | ±0.19 | ±0.28 | ±0.22 |
| P12.5 | φ12.3 | |||
| P14 | φ13.8 | |||
| P15 | φ14.8 | ±0.20 | ±0.30 | ±0.24 |
| P16 | φ15.8 | |||
| P18 | φ17.8 | ±0.21 | ±0.31 | ±0.25 |
| P20 | φ19.8 | ±0.22 | ±0.33 | ±0.26 |
| P21 | φ20.8 | ±0.23 | ±0.34 | ±0.27 |
| P22 | φ21.8 | ±0.24 | ±0.36 | ±0.28 |
| P22A | φ21.7 | |||
| P22.4 | φ22.1 | |||
| P24 | φ23.7 | |||
| P25 | φ24.7 | ±0.25 | ±0.37 | ±0.30 |
| P25.5 | φ25.2 | |||
| P26 | φ25.7 | ±0.26 | ±0.39 | ±0.31 |
| P28 | φ27.7 | ±0.28 | ±0.42 | ±0.33 |
| P29 | φ28.7 | ±0.29 | ±0.43 | ±0.34 |
| P29.5 | φ29.2 | |||
| P30 | φ29.7 | |||
Performance info.
■Operating Temperature Range of O-rings P Series
| Material | Hardness (JIS Hs) | Color | Operable Temperature Range |
|---|---|---|---|
| Nitrile Rubber | 70±5 | Black | －30-100℃ |
| Nitrile Rubber | 90±5 | Black | －25-100℃ |
| Silicon Rubber | 50±5 | Milky White | －50-200℃ |
| Silicon Rubber | 70±5 | Navy | －50-200℃ |
| Fluororubber | 70±5 | Black | －15-200℃ |
| Fluororubber | 90±5 | Black | －15-200℃ |
| Ethylene Propylene Rubber | 70±5 | Black | －45-130℃ |
IDEA NOTE Idea on the O-ring groove
Since the O-ring is used as a resistant body, the groove on the fastening side has a rectangular shape and the groove on the loosening side is V shaped.
-
-
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
CAD Data Limitations
-
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. -
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. - The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
- The Data including the third-part components are made by the Company.
* The part in the frame is a sub-assembly unit.
-
- * 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
- To press-fit caps into a plastic casing.
Points for use
- Manual operation for small-quantity production.
Target workpiece
- Plastic cap
- Approximate workpiece size: 40X29X12mm
Design Specifications
Operating Conditions or Design Requirements
- External dimensions: W200XD250XH316mm
- Press fit stroke: 30mm
Required Performance
- Pushing force: 50N or more
- Operating load: 10N or less
Selection Criteria for Main Components
- Device mounting stand
- Select an economical shaft with a large diameter.
Design Evaluation
Verification of main components
- Verify that the cap pressing force meets the required operating load.
- Relationship between handle operating load and pushing force
- Conditional values:
Pinion pitch circle radius rm=24mm=0.024m
Operating load Fs N
Pushing force F N = 50N
Pinion center - Operation point R m = 160mm = 0.16m - F N = Fs x R/r
Operating load Fs = F/R × r Thus, Fs ＝ 50/0.16 x 0.024 ＝ 7.5N
⇒Meeting "Necessary operating load of 10N or less."
- Conditional values:
Other Design Consideration
- For most O-ring applications, the groove shapes conform to JIS standards. However, different shapes are used for this application.
Explore Similar Application Examples
Page
-
/
-
Payment Methods
- Credit Card
-
- Bank
-
- Prompt Pay
-
Social Media
MISUMI Contact
Copyright © MISUMI Corporation All Rights Reserved.