ASME B18.8M:1995 pdf download SPRING PINS一 COLED TYPE (METRIC SERIES)
1 INTRODUCTORY NOTES
1.1 Scope
1.1.1 This Standard covers the dimensional and general data for coiled spring pins recognized as AmericanNational Standard, which are widely used in general industrial applications.
11.2 The inclusion of dimensional data in this Standard is not intended to imply that all products deseribedare stock production sizes. Consumers are requested toconsult with suppliers concerning the availability ofproduct.
1.2 Description
Coiled spring pins shall have straight cylindrical sideswith both ends chamfered. They are available in standard duty.heavy duty, and light duty to suit variousdesign requirements, Coiled type spring pins have mul-tiple walls,are spiraily wrapped from strip stock to adiameter larger than basic,and are heat treated as necessary or cold worked.Upon installation,the pin diameters contract and the spring reaction against the sidesof the hole tends to retain the pin, Dimensions of coiledtype spring pins are given in Table 1.
1.3 Dimensions
All dimensions in this Standard are in millimeters un-less otherwise noted.
1.4 Options
Options, where specified, shall be at the discretion ofthe supplier,unless otherwise agreed upon by the supplier and purchaser.
1.5 Terminology
For definitions of terms relating to fasteners or component features thereof used in this Standard, refer to ANSI B18.12.Glossary of Terms for Mechanical Fas-teners.
1.6 Comparison With IS0 8748,1S0 8750,andIS08751
1.6.1 ISO 8748,ISO 8750,and ISO 8751 were prepared by Technical Committee ISO/TC2 and publishedin1987.
1.6.2 1SO 8748 covers the heavy duty，ISO 8750covers the standard duty, and ISO 8751 covers the lightduty.This Standard includes all three duties.
1.6.3 At this time,all three ISO documents covercarbon steel only.This Standard covers the followingmaterials:
(a)1070-1095 carbon steel(UNS G10700-UNSG10950)
(b) 6150 alloy steel(UNS H61500)
(c) 420 corrosion resistant steeI (UNS S42000)
(d) 302 or 304 corrosion resistant steel(UNS S30200or UNS S30400)
The ISO documents detail the chemical elements of thematerials. while this Standard identifies the materialsusing the applicable UNS designation.
1.6.4 The pin hardness in the three ISO documentsfor carbon steel is listed as 420 to 520 HV. This Stan-dard lists the hardness for carbon steel and alloy steel as420 to 545 HY.This difference has been called to theattention of the proper ISO committee for resolution .
1.7 Referenced Standards
Copics of referenced ISO standards may be obtainedfrom the American National Standards Institute,Inc..11 West 42nd Street,New York，NY10036.
Copies of referenced ANSI and ASME/ANSI standards may be obtained from ANSI at the address aboveor from The American Society of Mechanical Engineers，22 Law Drive，Box 2900，Fairfield，N] 07007-2900.
2 GENERAL DATA FOR SPRING PINS-COILED TYPE
2.1 Diameter
The nature of the manufacturing process and the over-lapping coil cause the outer periphery of coiled typespring pins to deviate from true round. Thus, conform-ance with specified minimum and maximum diameterlimits shall be determined by the use of go and no goplain ring gages, respectively, The length of the holesin the ring gages shall not be greater than 3 mm. Thefull length of the pin shall pass freely through the goring gage. Neither end of the pin shall enter the no goring gage beyond the length of the chamfer on the pin.
2.2 Ends
Both ends of coiled spring pins shall be chamfered asshown and specified in Table l.
2.3 Length
2.3.1 Measurement,The length of coiled springpins shall be measured overall from end to end, parallelto the longitudinal axis of the pin.
2.3.2 Tolerance on Length. The tolcrance of thelength.of coiled spring pins shall be as given in the tablebelow.
ASME B18.8M:1995 pdf download
PS:Thank you for your support!
