FLUTELESS (FORMING) TAPS
Using plastic working to produce internal thread, this tap is suitable tapping for low carbon steel, alloy steel, stainless steel and nonferrous metals good stringy materials.
Features of fluteless taps
•They are suitable for blind hole tapping in producing internal thread with no chips, they save you a time for disposal chip.
•The effect of fluteless gives a large cross-section area to the tap that effectively eliminates the problem of chip jamming and thus make roll very strong.
•Fluteless tap produce excellent pitch diameter well within pitch diameter tolerances.
•Material defomation process produces the internal thread with good surface finish as well as precise pitch diameter.
|
Metric thread nominal size |
Tap limit |
Specification |
Class 2 drill hole dia |
|||||
|
A |
B |
C |
E |
F |
Min-Max |
Thread overlap ratio % |
||
|
M3 x 0.5 |
R5 |
46 |
9 |
4 |
6 |
3.2 |
2.76 ~ 2.81 |
100 ~ 75 |
|
M3.5 x 0.6 |
R5 |
48 |
11 |
4 |
6 |
3.2 |
3.20 ~ 3.26 |
100 ~ 75 |
|
M4 x 0.7 |
R6 |
52 |
12 |
5 |
7 |
4 |
3.65 ~ 3.70 |
100 ~ 85 |
|
M5 x 0.8 |
R6 |
60 |
14.5 |
5.5 |
7 |
4.5 |
4.59 ~ 4.66 |
100 ~ 80 |
|
M6 x 1.0 |
R7 |
62 |
17.5 |
6 |
7 |
4.5 |
5.48 ~ 5.57 |
100 ~ 80 |
|
M7 x 1.0 |
R7 |
65 |
13 |
6.2 |
8 |
5 |
6.48 ~ 6.57 |
100 ~ 80 |
|
M8 x 1.25 |
R7 |
70 |
18 |
6.2 |
8 |
5 |
7.34 ~ 7.41 |
100 ~ 85 |
|
M10 x 1.25 |
R7 |
75 |
19 |
7 |
8 |
5.5 |
9.34 ~ 9.41 |
100 ~ 85 |
|
M10 x 1.5 |
R7 |
75 |
19 |
7 |
8 |
5.5 |
9.18 ~ 9.28 |
100 ~ 85 |
|
M12 x 1.75 |
R8 |
82 |
23 |
8.5 |
9 |
6.5 |
11.05 ~ 11.15 |
100 ~ 85 |
|
M14 x 2 |
R10 |
88 |
25 |
10.5 |
11 |
8 |
12.92 ~ 13.04 |
100 ~ 85 |
|
M16 x 2 |
R10 |
95 |
27 |
12.5 |
13 |
10 |
14.92 ~ 15.04 |
100 ~ 85 |
|
M18 x 2.5 |
R11 |
100 |
29 |
14 |
14 |
11 |
16.63 ~ 16.78 |
100 ~ 85 |
|
M20 x 2.5 |
R11 |
105 |
30 |
15 |
15 |
12 |
18.63 ~ 18.78 |
100 ~ 85 |
|
Unified thread nominal size |
Tap limit |
Specification |
Class 2B drill hole dia |
|||||
|
A |
B |
C |
E |
F |
Min-Max |
Thread overlap ratio % |
||
|
NO.4-40 UNC |
R5 |
46 |
9 |
4 |
6 |
3.2 |
2.53 ~ 2.60 |
100 ~ 70 |
|
NO.5-40 UNC |
R5 |
46 |
9 |
4 |
6 |
3.2 |
2.86 ~ 2.93 |
100 ~ 70 |
|
NO.6-32 UNC |
R5 |
48 |
11 |
4 |
6 |
3.2 |
3.09 ~ 3.17 |
100 ~ 75 |
|
NO.8-32 UNC |
R6 |
52 |
12 |
5 |
7 |
4 |
3.76 ~ 3.84 |
100 ~ 75 |
|
NO.10-24 UNC |
R6 |
60 |
14.5 |
5.5 |
7 |
4.5 |
4.26 ~ 4.35 |
100 ~ 80 |
|
NO.12-24 UNC |
R6 |
60 |
14.5 |
5.5 |
7 |
4.5 |
4.92 ~ 5.01 |
100 ~ 80 |
|
1/4-20 UNC |
R7 |
62 |
17.5 |
6 |
7 |
4.5 |
5.67 ~ 5.78 |
100 ~ 80 |
|
5/16-18 UNC |
R7 |
70 |
22 |
6.1 |
8 |
5 |
7.18 ~ 7.29 |
100 ~ 80 |
|
3/8-16 UNC |
R7 |
75 |
21 |
7 |
8 |
5.5 |
8.66 ~ 8.78 |
100 ~ 80 |
|
7/16-14 UNC |
R7 |
80 |
23 |
8 |
9 |
6 |
10.11 ~ 10.25 |
100 ~ 80 |
|
1/2-13 UNC |
R8 |
85 |
25 |
9 |
10 |
7 |
11.62 ~ 11.78 |
100 ~ 80 |
|
5/8-11 UNC |
R11 |
95 |
27 |
12 |
12 |
9 |
14.62 ~ 14.76 |
100 ~ 85 |
|
3/4-10 UNC |
R12 |
105 |
30 |
14 |
14 |
11 |
17.67 ~ 17.88 |
100 ~ 80 |
1. By powder metallurgy and special high-speed steel HSSE and special thread, long tool life processing is possible at wide.
2. TIN, TICN coating, suitable for tapping steel and nonferrous metal alloy, capable of efficient, long life, high speed tapping.
The specification of standard coarse screw thread and standard fine screw thread are the same.