JIS-B-1118-1995-R2005-ENG.pdf
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1、JIS z I JAPANESE INDUSTRIAL STANDARD Square head set screws JIS B 11 1 8 - 1 9 9 5 . Translated and Published by Japanese Standards Association UDC 621.882.2 Printed in Japan 7s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Win
2、g, Bernie Not for Resale, 03/12/2007 09:11:46 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B X l l L B 95 4933608 053L764 751 In the event of any doubt arising, the original Standard in Japanese is to be final authority Errata for JIS (English edition) are printed
3、in Standardization Journal, published monthly by the Japanese Standards Association. Errata will be provided upon request, please contact: Business Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, JAPAN 107 TEL. 03-3583-8002 FAX. 03-3583-0462 Errata are also provided to
4、subscribers of JIS (English edition) in Monthly information. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:11:46 MDTNo reproduction or networking permitted without license from IHS -,-
5、,- J I S BbLLL 55 m 4533b08 05317b5 b98 m UDC 621.882.2 JAPANESE INDUSTRIAL STANDARD J I S Square head set screws B 1118-1995 1 . Scope This Japanese Industrial Standard specifies the steel square head set screws (hereafter referred to as “steel set screws“) and stainless steel square head set screw
6、s (hereafter referred to as “stainless steel set screws“) for general use. Remarks 1 . In this Standard, when the steel set screws and stainless steel set screws are generically called, these are simply called “set screws“. 2. The standards cited in this Standard are as given in the following: JIS B
7、 0101 JIS B O122 JIS B 0205 JIS B 0209 JIS B 1003 JIS B 1021 JIS B 1044 JIS B 1053 JIS B 1054 JIS B 1071 JIS B 1091 JIS G 3539 JIS G 4051 Screw threads and fasteners - Vocabulary Symbols of metal working processes Metric coarse screw threads Limits of sizes and tolerances for metric coarse screw thr
8、eads Ends of parts with external metric screw thread Tolerance system for threaded fasteners Threaded components - Electroplated coatings Mechanical properties of steel set screws Specification for corrosion-resistant stainless steel fasteners Method of verification for size and geometry of threaded
9、 fasteners Fasteners - Acceptance inspection Carbon steel wires for cold heading and cold forging Carbon steels for machine structural use 2. Definitions For the purposes of this Standard, the definitions given in JIS B O101 apply. 3. Types truncated cone point, long dog point, cup point and rounded
10、 end, according to the shape of screw point. The set screws are classified into 5 types of flat point, Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:11:46 MDTNo reproduction or network
11、ing permitted without license from IHS -,-,- J I S B*3338 95 m 4933608 0533766 524 m 2 B 1118-1995 4 . Product grades cordance with the product grade A for the general-use threaded fasteners of JIS B 1021. The product grades for set screws shall be in ac- 5 . Mechanical properties 5 . 1 Mechanical p
12、roperties of steel set screws The mechanical properties of steel set screws shall be in accordance with the strength divisions 14H and 22H of JIS B 1053. The mechanical properties for the steel set screws processed with case hardening shall be in accordance with the agreement between the parties con
13、cerned with acceptance. However, the surface hardness of these set screws, unless otherwise specified by the purchaser, shall be 450HV to 570HV (45HRC to 55HRC). 5 . 2 Mechanical properties of stainless steel set screws The mechanical properties of the stainiess steel set screws shall be in accordan
14、ce with the property division Al-50 of JIS B 1054. However, the hardness of the core part shall be 140HV or harder, and when that of 220HV or harder is required, it shall be so designated by the purchaser. 6 . Shapes and dimensions shall be in accordance with Attached Table 1 . The shapes and dimens
15、ions of the set screws 7 . Screw threads The screw threads of the set screws shall be the metric coarse threads in the text of JIS B 0205, and the tolerance class thereof shall be 6g in the text of JIS B 0209. The maximum permissible dimensions of the screw threads processed with the electroplating
16、shall be the maximum permissible dimensions of 4h. 8. Geometrical tolerances The geometrical tolerances of set screws shall be in accordance with the geometrical tolerances specified in the product grade A of JIS B 1021. applicable to the set screws shall be in accordance with Table 1 . However, the
17、 items of geometrical tolerances Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:11:46 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BE1118 95 4933608 0
18、5317b7 460 Item of geometrical tolerances Coaxiaiity of head to shank 5 B 1118-1995 Figure No. in Attached Table 1 of JIS B 1021 Fig. 1 . 1 Rectangularity of bearing surface of head to shank Parallelism of side faces of width across flats of head to shank Runout of cone face of truncated cone point
19、to threaded portion Coaxiality of long dog point to threaded portion Fig. 1.23 Fig. 1 . 3 3 Fig. 1 . 1 5 Fig. 1 . 1 4 Rectangularity of end face of long dog point to threaded portion Runout of cone face of cup point to threaded portion Fig. 1.29 Fig. 1.16 Straightness of shank Fig. 1 . 3 5 9. Surfac
20、e conditions The surface of set screw shall be smooth, and be free from quenching cracks and injurious defects in use such as flaws, burrs, flashes, and chippings of thread. Heat treatment 10. Materials and heat treatments The materials and heat treatments of set screws shall be in accordance with T
21、able 2 . Material Table 2 . Materials and heat treatments of set screws - Division of set screws by material In accordance with 5 . of JIS B 1054. Steel set screws Strength and property divisions 14H 22H S tainie ss Al-50 steel set I screws Quenching and tempering() In accordance with 3 . of JIS B 1
22、053. Case hardening It shall be as agreed between the parties concerned with acceptance. However, unless otherwise speci- fied on material, it should pre- ferably be in accordance with the SWCH 12K to 20K of JIS G 3539 or S12C to S20C of JIS G 4051. Copyright Japanese Standards Association Provided
23、by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 09:11:46 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*LLLB 95 W 4933608 053L7b8 3 T i W 22H 4 B 1118-1995 Hardness of core portion Surface hardness Decarb
24、urization of threaded portion Note ( l ) When heat treated steel which satisfies the mechanical pro- perties of strength division 22H is used for the products, the quenching and tempering of products may be omitted. 1 1 . Surface treatments The steel set screws which have been heat treated may be pr
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- JIS 1118 1995 R2005 ENG
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