GB/T 3464.3-1994 Short-shank machine and hand taps

GB/T 3464.3-1994 Short-shank machine and hand taps GB/T3464.3-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Short Shank Machine and Hand Taps
Short Shank Machine and Hand TapsGB/T3464.3—94
The types and sizes of taps in this standard refer to the international standard ISO529-1975 "Short Machine Taps and Hand Taps", and are appropriately adjusted according to domestic demand. Subject content and scope of application
This standard specifies the basic requirements for the types, sizes and markings of short shank machine taps (high performance grade and ordinary grade) and hand taps. This standard is applicable to short shank machine and hand taps for machining ordinary threads (GB/T192～193, GB/T196～197). Cited standards
GB/T 192
GB/T 193
GB/T 196
GB/T 197
GB/T 968
GB/T969
Ordinary thread
Ordinary thread
Ordinary thread
Basic tooth profile
Diameter and pitch series (diameter 1 ~ 600mm) Basic size (diameter 1 ~ 600mm)
Tolerance and fit (diameter 1 ~ 355mm)
Tolerance of tap thread
Technical conditions for taps
3 Types and sizes of taps
Stubby shank machine and general purpose taps shall be in accordance with the provisions of Figure 1 and Table 1 and Table 2. AA
Approved by the State Bureau of Technical Supervision on December 20, 1994, 204
Implemented on September 1, 1995
M2X 0. 25
M2.2X0.25
M2.5X0.35
Nominal diameter
Nominal diameter
GB/T3464.3--94
Tap for coarse pitch ordinary thread
Tap for fine pitch ordinary thread
3.2 Coarse shank, necked, short shank machine and hand taps shall comply with the provisions of Figure 2 and Tables 3 and 4. L
Nominal diameter
GB/T 3464.3—94
Tap for coarse thread
M3.5X0.35
M6×0. 75bzxz.net
M8X 0. 75
Nominal diameter
GB/T3464.3--94
Tap for fine thread
Short-shank machine and hand taps shall be as specified in Figure 3 and Tables 5 and 6. 3.3
Nominal diameter
GB/T3464.3-94
Table 5 Taps for coarse thread
M3.5X0.35
M5.5×0.5
M6×0. 75
M10×1
M14× 1. 5
M15 X1. 5
Nominal diameter
GB/T 3464.3—94
Taps for fine thread
M18×1
M28×1
M30×1
M30×2
M30×3
Nominal diameter
GB/T 3464.3-94
Continued Table 6
M39×3
M42×3
Nominal diameter
GB/T 3464. 3--94
Continued Table 6
M48X×1.5
Nominal diameter
Note: Dimensions in parentheses should be used as little as possible. Pitch
②M14×1.25 is only used for spark plugs.
GB/T 3464. 3 --- 94
Continued Table 6
M35×1.5 is only used for rolling bearing locking nuts. L
1) d2min in Table 3 and Table 4 is the size of the empty knife groove. It is allowed to have no empty groove. When there is no empty groove, the length of the threaded part should be 1+1/2. 3.4 Taps with a nominal diameter of less than or equal to 8mm can be made into external taps. 3.5 The applicable scope, main deflection angle, and cutting cone length of single and grouped taps are recommended as shown in Table 7. Table 7
Applicable scope
Single group
(equal diameter) wire
Main deflection angle
Cutting cone
Group (unequal diameter)
Applicable range
GB/T 3464.3--94
Continued Table 7
Main deflection angle
First coarse taper
Second coarse taper
Cutting cone
Note: ① For taps with a pitch less than or equal to 2.5mm, the production and supply of single tapers with medium tapers shall be preferred. When required, it can also be manufactured and supplied as a group of unequal diameter wires. ② The number of taps in each group of the grouped taps shall be determined by the manufacturer according to the needs of use. ③ For the grouped unequal diameter taps, 1 or 2 rings shall be cut on the first and second coarse taper shanks respectively, or sequential guide marks shall be used for identification. 3.6 The nominal cutting angles of the taps produced centrally are measured in the radial plane and are recommended as follows: the front angle % is 8°~10%;
b. The back angle α is 4°~6°
3.7 Marking example
a. Right-handed coarse-pitch ordinary thread, diameter 10mm, pitch 1.5mm, H1 tolerance zone, single primary chain (bottom cone) high-performance short-shank machine tap:
Short-shank machine tap primary (bottom) GM10-H1GB/T3464.3--94 b. Right-handed fine-pitch ordinary thread, diameter 10mm, pitch 1.25mm, H4 tolerance zone, single medium-cone short-handle hand tap chain: short-handle hand tap M10×1.25GB/T3464.3---94c
coarse-pitch ordinary thread with spiral, diameter 12mm, pitch 1.75mm, H2 tolerance zone, two pieces (primary cone and bottom cone) set of ordinary grade equal-diameter short-handle machine taps:
short-handle machine tap primary and bottom M12-H2GB/T3464.3—94d. Left-handed coarse pitch ordinary thread, diameter 27mm, pitch 3mm, H3 tolerance zone, three pieces: ordinary grade unequal diameter short shank machine taps:
Short shank machine taps (unequal diameter)
3-M27L-H3 GB/T 3464.3---94
Note: Taps with diameters of 3~10mm have both coarse shank and fine shank structures. In cases where the shank structure needs to be clearly specified, the name of the tap should be preceded by "coarse shank" or "fine".
4 Technical conditions
The technical conditions of taps shall be in accordance with the provisions of GB/T969. Additional notes:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard was issued by the National Technical Committee for Tool Standardization. This standard was drafted by Chengdu Tool Research Institute. The main drafting units of this standard were Chengdu Tool Research Institute and Tianjin Special-shaped Cutting Tool Factory. 2
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