GB/T 15054.1-1994 Small thread profile

GB/T 15054.1-1994 Small thread profile GB/T15054.1-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Miniature screw threads-ProfilesbZxz.net
Miniature screw threads-ProfilesThis standard adopts the international standard ISO/R1501--70 "ISO small screw threads". Subject content and scope of application
This standard specifies the basic tooth profile and design tooth profile of small screw threads. This standard is applicable to small screw threads for general use with a nominal diameter range of 0.3 to 1.4 mm. 2 Basic tooth profile
2.1 The basic tooth profile and its parameters are shown in Figure 1. 2.2 The dimensions of the basic tooth profile are listed in Table 1.
Thread axis
Figure 1 Basic tooth profile
In the figure: D-
Major diameter of internal thread;
-Major diameter of external thread;
Middle diameter of internal thread:
-Middle diameter of external thread:
D,——minor diameter of internal thread;
State Bureau of Technical Supervision approved GB/T15054.1-94 on May 3, 1994
Replace the small thread part in GB192-63
Implementation on March 1, 1995
d,—minor diameter of external thread;
—pitch;
H——height of original triangle;
H,-height of basic tooth profile.
3 Design tooth profile
0. 866 025P
0.077 942
GB/T 15054.1-94
Table 1 Basic tooth profile dimensions
3.1 Design tooth profile and its parameters are shown in Figure 2. 5F
0.324760P
External thread
Figure 2 Design tooth profile of internal and external threads
In the figure; h.-external thread height;
ac———radial clearance between internal and external threads at the minor diameter; ds——external thread minor diameter;
R-external thread bottom arc radius;
Other codes are the same as Figure 1.
3.2 Calculation formula for design tooth profile size
Tooth crest width
0.010 000
0.011 250
0. 015 625
.0.025000
Internal thread
Tooth bottom width
0.032 074
0. 048 112
0.064 149
H,=0.48P;
a.=0. 08 P;
h3=Hi+a.=0. 56 P;
GB/T 15054.1--94
Dz=dz-d-0.75Hd-0.649 52 P;
D,=d—2H,=d--0. 96 P;
ds-d-2h3d-1.12P,
Rmax = 0. 2 P.
3.3 The dimensions of the designed tooth profile are listed in Table 2.
Table 2 Dimensions of the designed tooth profile
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is drafted and managed by the Standardization Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Li Xiaobin, Yu Yuan and Yu Minhui. ha
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