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Taps and Dies Cut on the Lathe, with Wrench and Stock
Omegatron · CC BY-SA 3.0
Martin

Imeundwa na

Martin

14. Oktoba 2026NO
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Taps and Dies Cut on the Lathe, with Wrench and Stock

A tap cuts the thread inside a hole; a die cuts it on a rod. Makers made their own in the 16th and 17th centuries. Cut the thread on tool steel in the screw-cutting lathe, file flutes so it cuts, harden it, and use the finished tap to cut the thread in a steel blank that becomes the matching die. A T-wrench turns the tap, a stock holds the die. The picture: a tap held in a T-wrench.
Juu
Two days for a few sizes

Maagizo

1

Turn and thread the tap

Turn tool steel to the thread's major diameter with a square on the end for the wrench. Cut the thread in the lathe at the right pitch and check it with the gauge. Taper the first 8–10 threads for a taper tap, or 3–5 for a plug tap.

Vifaa kwa hatua hii:

Kipande cha pembe nane cha feleji ya zanaKipande cha pembe nane cha feleji ya zana1 kipande

Zana zinazohitajika:

Kereza ya ChumaKereza ya Chuma
Seti ya Zana za Kugeuza Mbao za HSSSeti ya Zana za Kugeuza Mbao za HSS
Kipimio cha nyuziKipimio cha nyuzi
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
Mafuta ya kukatiaMafuta ya kukatia
2

Flute and harden the tap

File three or four lengthwise flutes along the thread so it has cutting edges and room for chips. Harden in water from cherry red and temper to brown.

Vifaa kwa hatua hii:

MajiMaji10 lita
MkaaMkaa1 as required

Zana zinazohitajika:

Tupa ya chumaTupa ya chuma
Kibano cha meza ya kaziKibano cha meza ya kazi
Fua ya mhunziFua ya mhunzi
Ndoo ya kupoza chumaNdoo ya kupoza chuma
Koleo za mhunziKoleo za mhunzi
Miwani ya usalamaMiwani ya usalama
3

Cut the die with the tap

Drill a flat tool-steel blank to the tap drill size and run the finished tap through it with oil. Drill clearance holes round the thread so it cuts, saw one side open so it can be set, then harden and temper it to brown.

Vifaa kwa hatua hii:

Kipande bapa cha feleji ya zanaKipande bapa cha feleji ya zana1 kipande

Zana zinazohitajika:

Kekee cha mkonoKekee cha mkono
Kibano cha meza ya kaziKibano cha meza ya kazi
Tupa ya chumaTupa ya chuma
Fua ya mhunziFua ya mhunzi
Ndoo ya kupoza chumaNdoo ya kupoza chuma
4

Wrench and stock

Forge and file a T-wrench with a square hole for the tap, and a die stock from flat bar with a round recess for the die, two handles and a set screw.

Vifaa kwa hatua hii:

Pau Bapa la Chuma LainiPau Bapa la Chuma Laini1 kipande

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
Tupa ya chumaTupa ya chuma
Kekee cha mkonoKekee cha mkono
Kibano cha meza ya kaziKibano cha meza ya kazi
5

Tap drill sizes

Inapakia daftari la Jupyter…

Vifaa

5

Zana Zinazohitajika

12

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