Cutting Tools

Hss hand taps are straight flute general purpose taps which can be used for both machine or hand tapping. They are generally the most economical tool for use on production runs, but are best on materials that produce chips, or where the swarf breaks readily. Where deep holes are to be tapped, in materials which produce stringy swarf, other types of taps may be needed, especially for coarse threads. Hand taps can be supplied in sets of three; bottom, second and taper leads, or individually.

• Bottom Taps have a chamfer (lead) of 1–2 threads, the angle of the lead being around 18 degrees per side. They are used to produce threads close to the bottom of blind holes.
• Second Taps have a lead of 3-5 threads at 8 degrees per side. They are the most popular and can be used for through holes, or blind holes where the thread does not need to go right to the bottom.
• Taper Taps have a lead of 7-10 threads at 5 degrees per side. The taper lead distributes the cutting force over a large area, and the taper shape helps the thread to start. They can therefore be used to start a thread prior to use of second or bottom leads, or for through holes

General Purpose Application ‘Totem’ range of Carbon Alloy Steel taps are known worldwide for their excellent quality. We are one of the largest producer of Carbon Taps around the world. We export more than 50% of our total production. We also do contract manufacturing for some of the very well known and prestigious brands.

• AISI M2 grade Square HSS Tool bits or Lathe Tool bits manufactured since 1963,
• Hardness of these M2 tool bits (ROHIT 1X) ranges from 62~65HRc,
• Tool bits manufactured starting from 1/16" to 2" Square in all lengths.
• All grades of Tool Bits or Lathe Bits namely M2, M35, M42, T42, ASP are manufactured at RIGPL

• AISI M2 grade HSS Flat / Rectangular Tool bits are manufactured since 1963,
• Hardness of these M2 flat tool bits (ROHIT 1X) ranges from 62~65HRc,
• Following grades of Flat Tool Bits are stocked in M2, M35, T42 grades by Rohit Cutting Tools,
• Special Sizes & Special Grades (like M42, ASP) are also manufactured on requests in HSS Flat Tool Bits.

These taps are used to produce a thread close to the bottom of a blind hole and therefore have a very short lead. The right hand spiral cut of the flutes acts to force the swarf away from the cutting teeth to the rear of the flutes and out of the hole. They are better on materials which form long continuous stringy swarf, rather than chips. They are also better to tap a thread in a hole where there is a break in the material, e.g. another hole, as the spiral fluting helps the tap to pick up on the other side. Spiral flute taps can have slow or fast helix angles.

Advantages: 

• Can be used in both blind holes & also in through holes
• Chips are pushed upwards due to spiral flute – Chip clogging avoided
• Full thread depth can be achieved and this design prevents tap breakage