TMA Buy machine tools from Taiwan. Nib Taps for automatic machines for internal thread tapping in nuts. Machine Tools for tapping carbon steel nuts and cold formed nuts. Nut Taps for Thread Rolling Machines.
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TOOLS FOR THREAD ROLLING MACHINES

 


 

Purpose and features of nut taps

Nut taps are used to cut through threads in nuts in one pass without screwing the nuts by threading them onto the shank end. Used on special Automatic Nuts Tapping Machine.

  • Due to the long length of nut taps, which makes them difficult to manufacture, especially when grinding threads, they are often made composite: a short cutting and a long tail are made separately, and then they are connected by friction welding, soldering or using a thread.
  • Nut Taps with bent shanks are used for threading nuts on automatic machines with a continuous cycle. Blanks of nuts are fed from the hopper into the cutting zone and, after threading, go down the bent shank into the tray.
  • Coupler Type Nib Taps are used for cutting threads on automatic nuts tapping machines in carbon steel nuts and cold formed nuts.
  • Composite Nib Tap Bent Shank with Coupler are manufactured with M8 ~ M64 metric thread, U 5/16~2-1/2" US thread, W 5/16~2-1/2" inch W thread.
  • The standard thread length is 25 threads.
  • Connecting taps with bent shanks by couplers could lower the possibilies of tap breakage caused by the strong torgue.
  • Tap nib and bent Shank are connected by coupler mechanically. If overload is given to tap in tapping, coupler will break itself and keep tap nib and bent shank free from breakage.
  • To meet customers' requirements, we are able to design and manufacture taps or couplers per the samples offered.
  • Tool Material Type:Vanadium-containing High-Speed Steel (HSSE) .
  • Surface treatment of nut taps: Titanium Nitride (TiN) or Titanium Carbon Nitride (TiCN).
  • The nut taps are manufactured with GH accuracy class (13 µm).

 

Outlook & Drawing of Coupler Type Nib Taps

Coupler Type Nib Taps размеры метчика Coupler Type Nib Taps Titanium Nitride (TiN) Titanium Carbon Nitride  (TiCN)
Thread Length B:
  • nut taps for hot forged nuts with thread length up to 28 threads;
  • nut taps for cold formed nuts with thread length up to 25 threads;
  • special nut taps with thread length up to 30, 32, 36 threads, etc.

 

Thread Specification B
Thread Length
Shank Thread (M)
28 treads 25 treads
M12 × 1.25 35 31.3 M7.5 × 1.25
M12 × 1.5 42 37.5
M12 × 1.75 49 43.8
M14 × 1.5 42 37.5 M9.6 × 1.25
M14 × 2 56 50
M16 × 1.5 42 37.5 M10 × 1.5
M16 × 2 56 50
M18 × 2 56 50 M12 × 1.5
M18 × 2.5 70 62.5
M20 × 1.5 42 37.5 M13.9 × 2
M20 × 2.5 70 62.5

 

Thread Specification B
Thread Length
Shank Thread (M)
28 treads 25 treads
M22 × 1.5 42 37.5 M15.8 × 2.5
M22 × 2.5 70 62.5
M24 × 3 84 75 M17 × 2.5
M27 × 3 84 75 M22 × 3
M30 × 3 84 75 M24 × 3
M33 × 3 84 75 M27 × 3
1/2-13UNC 54.7 48.8 M7.5 × 1.25
1/2-20UNF 35.6 31.8
9/16-12UNC 59.3 52.9 M9.6 × 1.25
9/16-18UNF 39.5 35.3
5/8-11UNC 64.7 57.7 M10 × 1.5

 

Thread Specification B
Thread Length
Shank Thread (M)
28 treads 25 treads
5/8-18UNF 39.5 35.3 M10 × 1.5
3/4-10UNC 71.1 63.5 M14 × 2
3/4-16UNF 44.5 39.7
7/8-9UNC 79 70.6 M15.8 × 2.5
7/8-14UNF 50.8 45.4
1"-8UNC 88.9 79.4 M20 × 3
1"-12UNF 59.3 52.9
1"1/8-7UN   C 101.6 90.7 M22 × 3
1"1/8-8UN 88.9 79.4
1"1/4-7UNC 101.6 90.7 M24 × 3
1"1/4-8UNC 88.9 79.4

 



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