What tool is used to cut internal threads?

Taps are mainly used for precise cutting of internal threads. GSR taps include hand taps, machine taps, as well as professional taps and tap kits. We supply all kinds of high quality thread tools.

How to cut internal threads?

1.Drill core hole (twist drill)

First, you need to drill a core hole with the twist drill. Make sure to use a center punch to mark the hole first to prevent the drill from going off track. Here is a drilling tip, low speed and high feed (soft materials) or low speed and low feed (hard materials). For hard materials (such as stainless steel), the tap diameter can be increased by 0.05-0.1mm to reduce the tap load. If you use this twist drill frequently, you should remove the chips regularly to prevent the drill from getting stuck. Check with a caliper or plug gauge, as a small hole diameter can cause the tap to break.For hard materials (such as stainless steel), the tap diameter can be increased by 0.05-0.1mm to reduce the tap load.

2. Countersink core hole (countersink)

Use a 90° or 120° countersunk drill, the depth is ≈ 0.5-1 times the pitch, and the chamfer diameter is slightly larger than the major diameter of the thread (for example: M6 thread chamfer to Φ6.5mm).

3. Cut internal thread (hand tap/machine tap)

Manual tapping: tap in stages (tapered tap → flat tap). Keep vertical and break chips after every 1-2 turns.

Machine tapping: Use a floating tapping chuck (to compensate for axial deviation).

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