HT (Screw Threads used on Sewing Machines) | Hand Taps | YAMAWA
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HT (Screw Threads used on Sewing Machines)
Product Features
- Suitable for workpiece materials where the chips are powdery or where the chips are produced as a small curl.
- The cutting edge strength is high.
- It is easy to resharpen.
Working part of the cutting chamfer
- The tap cuts an internal thread with the chamfer section.
- The chamfer section is tapered towards the tip to facilitate cutting into a prepared hole.
- Since the cutting chamfer portion of the tap has incomplete threads, the tapped internal
threads also have imperfect threads as shown on the right.
(Please be aware that the component will not have perfect threads unless all of the chamfer
portion is passed through the designated thread length.)
Difference in length of chamfer portion.
 |
The cutting chamfer length of the taper tap is 9 threadslong. The taper tap is used first because the long chamfer gradually cuts the full thread height easily with a small metal removal per thread pitch. However, in blind holes, the nine thread chamfer portion leaves a large number of incomplete threads that must be removed with a different tap. When tapping a through hole the full cutting chamfer length can be fed through the hole to complete all the threads. |
 |
The cutting chamfer length of a plug (middle) tap is 5 threads long. The plug (middle) tap is used after a taper tap to lengthen the number of full threads in a blind hole. The plug (middle) tap will produce 5 incomplete threads. When tapping a blind hole, the taps are used in the order of a taper tap → a plug (middle) tap and → a bottom tap. The plug tap is used after the taper tap and before the bottom tap. The plug tap can be used as a starter tap if necessary. |
 |
The cutting chamfer length of a bottom tap is 1.5 threads long. The bottom tap is used after the plug (middle) tap to lengthen the number of full threads in a blind hole. The bottom tap is difficult to use manually to start the thread cutting process. The bottom tap can create full threads to within 1.5 threads of the bottom of a blind hole. |
In the past, it was common for hand taps to be used manually in sets of three chamfer lengths (taper, plug (middle) and bottom)
for the same diameter and pitch thread. Today, most methods of thread processing on tapping machines, drilling machines, CNC
machines and special machines allow for the use of just one type of tap chamfer length to be used that best suits the components
requirements. This saves time while producing quality threads with just one tap. Therefore, due to the decrease in demands for the
taper tap, YAMAWA stopped production of taper taps in March 2013.
Specification
Tapping Speeds depending on Materials
Oversize
Segment：1A
|
Size |
Class |
Code |
Chamfer |
L (mm) |
ℓ (mm) |
ℓn (mm) |
ℓs (mm) |
Ds (mm) |
K (mm) |
ℓk (mm) |
No. of flutes |
TYPE |
|
For Screw Threads used on Sewing Machines |
||||||||||||
|
1/16SM80 |
P1 |
TNMPS04B5 |
5P |
36 |
6.3 |
- |
24 |
3 |
2.5 |
5 |
3 |
2 |
|
1/16SM80 |
P1 |
TNMPS04B1 |
1.5P |
36 |
6.3 |
- |
24 |
3 |
2.5 |
5 |
3 |
2 |
|
5/64SM64 |
P1 |
TNMPS05D5 |
5P |
42 |
7.2 |
12 |
27 |
3 |
2.5 |
5 |
3 |
3 |
|
5/64SM64 |
P1 |
TNMPS05D1 |
1.5P |
42 |
7.2 |
12 |
27 |
3 |
2.5 |
5 |
3 |
3 |
|
3/32SM56 |
P1 |
TNMPS06E5 |
5P |
46 |
8.1 |
14 |
29 |
3 |
2.5 |
5 |
3 |
3 |
|
3/32SM56 |
P1 |
TNMPS06E1 |
1.5P |
46 |
8.1 |
14 |
29 |
3 |
2.5 |
5 |
3 |
3 |
|
3/32SM100 |
P1 |
TNMPS06A5 |
5P |
46 |
3.4 |
14 |
29 |
3 |
2.5 |
5 |
3 |
5 |
|
3/32SM100 |
P1 |
TNMPS06A1 |
1.5P |
46 |
3.4 |
14 |
29 |
3 |
2.5 |
5 |
3 |
5 |
|
1/8SM40 |
P2 |
TNMQS08H5 |
5P |
52 |
11 |
16 |
28 |
5 |
4 |
7 |
3 |
3 |
|
1/8SM40 |
P2 |
TNMQS08H1 |
1.5P |
52 |
11 |
16 |
28 |
5 |
4 |
7 |
3 |
3 |
|
1/8SM44 |
P2 |
TNMQS08G5 |
5P |
52 |
11 |
16 |
28 |
5 |
4 |
7 |
3 |
3 |
|
1/8SM44 |
P2 |
TNMQS08G1 |
1.5P |
52 |
11 |
16 |
28 |
5 |
4 |
7 |
3 |
3 |
|
9/64SM40 |
P2 |
TNMQS09H5 |
5P |
52 |
11 |
16 |
29 |
5 |
4 |
7 |
3 |
3 |
|
9/64SM40 |
P2 |
TNMQS09H1 |
1.5P |
52 |
11 |
16 |
29 |
5 |
4 |
7 |
3 |
3 |
|
11/64SM32 |
P2 |
TNMQS11J5 |
5P |
60 |
13 |
21 |
33 |
5.5 |
4.5 |
7 |
4 |
3 |
|
11/64SM32 |
P2 |
TNMQS11J1 |
1.5P |
60 |
13 |
21 |
33 |
5.5 |
4.5 |
7 |
4 |
3 |
|
11/64SM40 |
P2 |
TNMQS11H5 |
5P |
60 |
13 |
21 |
33 |
5.5 |
4.5 |
7 |
4 |
3 |
|
11/64SM40 |
P2 |
TNMQS11H1 |
1.5P |
60 |
13 |
21 |
33 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM24 |
P2 |
TNMQS12M5 |
5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM24 |
P2 |
TNMQS12M1 |
1.5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM28 |
P2 |
TNMQS12K5 |
5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM28 |
P2 |
TNMQS12K1 |
1.5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM32 |
P2 |
TNMQS12J5 |
5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM32 |
P2 |
TNMQS12J1 |
1.5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM40 |
P2 |
TNMQS12H5 |
5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
3/16SM40 |
P2 |
TNMQS12H1 |
1.5P |
60 |
13 |
21 |
32 |
5.5 |
4.5 |
7 |
4 |
3 |
|
15/64SM28 |
P2 |
TNMQS15K5 |
5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
15/64SM28 |
P2 |
TNMQS15K1 |
1.5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
1/4SM24 |
P2 |
TNMQS16M5 |
5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
1/4SM24 |
P2 |
TNMQS16M1 |
1.5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
1/4SM28 |
P2 |
TNMQS16K5 |
5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
1/4SM28 |
P2 |
TNMQS16K1 |
1.5P |
62 |
15 |
26 |
33 |
6 |
4.5 |
7 |
4 |
3 |
|
1/4SM40 |
P2 |
TNMQS16H5 |
5P |
62 |
8.6 |
26 |
33 |
6 |
4.5 |
7 |
4 |
5 |
|
1/4SM40 |
P2 |
TNMQS16H1 |
1.5P |
62 |
8.6 |
26 |
33 |
6 |
4.5 |
7 |
4 |
5 |
|
9/32SM28 |
P2 |
TNMQS18K5 |
5P |
70 |
19 |
- |
36 |
6.2 |
5 |
8 |
4 |
6 |
|
9/32SM28 |
P2 |
TNMQS18K1 |
1.5P |
70 |
19 |
- |
36 |
6.2 |
5 |
8 |
4 |
6 |
|
5/16SM24 |
P2 |
TNMQS20M5 |
5P |
70 |
19 |
- |
36 |
6.2 |
5 |
8 |
4 |
6 |
|
5/16SM24 |
P2 |
TNMQS20M1 |
1.5P |
70 |
19 |
- |
36 |
6.2 |
5 |
8 |
4 |
6 |
|
11/32SM28 |
P2 |
TNMQS22K5 |
5P |
75 |
23 |
- |
38 |
7 |
5.5 |
8 |
4 |
6 |
|
11/32SM28 |
P2 |
TNMQS22K1 |
1.5P |
75 |
23 |
- |
38 |
7 |
5.5 |
8 |
4 |
6 |
| แบรนด์สินค้า | YAMAWA |
|---|
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