What is a Machine Tap?
A machine tap (also known as a machine thread tap or machine thread cutter) is a specially hardened tool used in drilling machines, tapping machines, or CNC machines. It cuts an internal thread in a single operation (“single-cut tap”), making the threading process much faster and more efficient compared to a conventional hand tap.
Types of Machine Taps
Based on the Nachreiner product range and generally available types, the following main categories can be distinguished:
- Standard Machine Tap M (Metric ISO)
- For metric ISO threads according to DIN 13, suitable for through and blind holes
- Single-cut design, i.e. full-profile taps – cut the thread in one pass
- Available in HSS-E or HSSE, often with cobalt content for increased tool life and wear resistance
- Made of solid carbide, sometimes with internal cooling
- Ideal for materials with high tensile strength and for hard machining (from approx. 54 HRC)
- Ensures excellent dimensional accuracy and long tool life
- Combines a twist drill tip (for the core hole) with a thread cutter
- Ideal for short through holes (up to about 2× nominal diameter)
- Space-saving and efficient for automated production setups
- Spiral-Fluted vs. Straight-Fluted Taps
- Spiral-fluted taps: spiral grooves ensure good chip evacuation – best suited for blind holes and softer materials
- Straight-fluted taps: straight grooves – suitable for through holes and ductile materials such as aluminum
- Special Types and Accessories
- Taps with chip breaker: improve chip control and prevent clogging
- Designs by number of flutes: two-, three-, or multi-fluted – affect tool life and thread quality
- Automatic machine taps: for highly automated production, available in metric, inch, or taper threads – usually with cooling or special tool holders
- Thread formers and thread mills: for chipless thread forming or CNC machining with short chips
For Nachreiner customers, there is a wide selection available – from HSS-E to solid carbide (VHM), straight or spiral fluted designs, combination drills, and specialized automation tools.
If you have questions about selecting the right tool, the Nachreiner team will be happy to provide expert advice.
| Type | Application area | Special feature |
|---|---|---|
| Machine tap M | Industry, drilling/CNC machines | Single-cut, HSS-E, Metric ISO |
| Solid carbide (VHM) | Hard steel, high-strength materials | Internal cooling, long tool life |
| Combination tap/Drill | Short through holes | Drills and taps simultaneously |
| Spiral / Straight fluted | Blind vs. through holes, depending on material | Optimized chip evacuation |
| Chip-breaker / Multi-fluted | Various chip and material conditions | Stability and chip control |
| Automatic machine tap | Automated serial production | Special holders and cooling |
| Thread former / Thread mill | Chipless thread forming, CNC machining | High precision, short chips |
Contact us for more information!
Do you have any questions or would you like to request a quote? Our team is always available to assist you. Contact us now.
