Short Machine Tap Form C HSS-G - NPT 1/4 x 18

• for general use
• non-abrasive material up to 900 N/mm²
• unalloyed and low alloyed steel
• for thread cutting by hand and machine
• for through and blind holes

1. Select the correct pilot drill for your material. NPT threads require a tapered pilot hole.
2. Drill the pilot hole with a drilling machine that has a suitable square drive holder, or prepare it manually.
3. Firmly clamp the tap into the machine's chuck or into a suitable tap wrench.
4. Apply plenty of cutting oil to the tool and the workpiece to reduce friction and increase tool life.
5. Begin to slowly turn the tap into the hole, ensuring a straight alignment.
6. Continue the cut until the desired thread is fully cut. For blind holes, continue until the required depth is reached.
7. Remove the tap and thoroughly clean the hole and the tool of all chips and residue.

• Thread type: American tapered pipe thread, taper 1:16
• Form: Single pass, Form C (2-3 threads chamfer)
• Material: HSS-G
• Nominal size: NPT 1/4 x 18
• Overall length (L1): 70 mm
• Thread length (L2): 25 mm
• Shank diameter (D2): 11 mm
• Drive: Square 9 mm
• EAN: 4022835635147
• Item Number: 63514

Q: What does "Single Pass Tap Form C" mean?

A: A single pass tap cuts the entire thread in a single operation. "Form C" refers to the tap's chamfer, which is 2-3 threads long and is very well-suited for thread cutting in through and blind holes.

Q: What is a tapered NPT thread used for?

A: Tapered NPT threads are widely used in the USA. They are primarily used for tight pipe connections in pneumatics and hydraulics. The conical shape ensures that the threads lock tightly into each other, creating a pressure-tight connection.

Q: Is this NPT tap suitable for all materials?

A: This tap is made of HSS-G (high-speed steel) and is specifically designed for easily machinable materials up to 900 N/mm². This includes unalloyed and low-alloy steels. For harder or abrasive materials, you may need a tap made of a different material, such as HSS-E.

Q: Can I use this tap with a drilling machine?

A: Yes, you can use this single pass tap with both a tap wrench for manual operation and in a suitable drilling machine with a square-jaw chuck for machine use. This makes it very flexible in its application.

Q: How do I maintain my thread cutter to make it last longer?

A: To extend the life of your thread cutter, you should thoroughly clean it of chips and residue after each use. The use of cutting oil is also essential to reduce friction and protect the tool. Store it dry and protected to prevent corrosion.