GB/T 15054.3-1994 Basic dimensions of small threads

GB/T 15054.3-1994 Basic dimensions of small threads GB/T15054.3-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Basic dimensions
Small thread
Miniature screw threads---Basic dimensionsThis standard refers to the international standard ISO/R1501-70 "ISO small thread". Subject content and scope of application
GB/T15054.3-94
Replaces GB194--63
This standard specifies the basic dimensions of small threads whose tooth type conforms to GB/T15054.1 and whose diameter and pitch conform to GB/T15054.2. This standard applies to small threads for general use with a nominal diameter range of 0.3 to 1.4 mm. 2 Reference standards
GB/T15054.1 Small thread tooth type
GB/T15054.2 Small thread diameter and pitch series 3 Codes and relationship formulas
The names, codes and relationship formulas of each size are listed in Table 1, and their dimensional relationships are shown in the figure. 4 Basic dimensions
The basic dimensions of each diameter are listed in Table 2.
External thread
Design tooth profile dimensions
Approved by the State Administration of Technical Supervision on May 3, 1994 218
Internal thread
Implemented on March 1, 1995
External thread major diameter
Internal thread major diameter
Minor diameter clearance
Basic tooth profile height
External thread tooth height
External thread pitch diameter
Internal thread pitch diameter
External thread minor diameter
Internal thread minor diameterbzxz.net
Tooth bottom circle radius
Nominal diameter
First series
Additional instructions:
Second series
GB/T 15054.3--94
Table 1 Names, codes and relationship formulas of dimensions
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. Dd
a.= 0. 08 p
hgHt l a0.56 P
dz=d- 0. 75H=d -0. 649 52 p
d;=d-—2hs-d—1. 12 P
Di=d --2H,- d- 0. 96 P
Rmax= 0. 2 P
Basic size
Pitch diameter of external and internal threads
(0.418810
This standard was drafted by the Standardization Research Institute of the Ministry of Machinery Industry and is under the jurisdiction of the main drafters of this standard: Li Xiaobin, Yu Yuan and Yu Minhui. X
Minor diameter of external thread
0.210 200
0.288 000 | 000
0.684 000
0.760.000
1.112 000
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