Hand Tap set of 3 pieces DIN 352 HSS-G - M 4 x 0.7

• for general use
• easily machinable materials up to 900 N/mm²
• unalloyed and low-alloyed steel
• for through and blind holes
• for hand use

1. Drill the core hole with the appropriate drill bit (Ø 3.3 mm) for the M 4 thread.
2. Straighten the taper tap (ring 1) with a tap wrench at the hole and slowly turn it in. Use cutting oil.
3. Carefully follow with the intermediate tap (ring 2) and turn it in.
4. Cut the thread to its final dimension with the bottoming tap (no ring).
5. Loosen the bottoming tap by carefully turning it back.
6. Thoroughly clean the cut thread and the tools of all chips and residue.

• Thread type: Metric ISO thread DIN 13
• Standard: DIN 352
• Material: HSS-G
• Tolerance: ISO 2 / 6H
• Nominal size: M 4 x 0.7
• Overall length (L1): 45 mm
• Thread length (L2): 13 mm
• Shank diameter (D2): 4.5 mm
• Drive: Square 3.4 mm
• EAN: 4022835273301
• Item Number: 27330

Q: Why does the set consist of three taps?

A: The 3-piece set is designed for hand use. It distributes the cutting load among three tools, which makes cutting easier and increases the tool life of each individual tap. The taper tap starts the cut, the intermediate tap deepens it, and the bottoming tap brings it to the final shape and exact dimension.

Q: What does the tolerance ISO 2 / 6H mean?

A: The tolerance class ISO 2 / 6H is the standard tolerance for metric ISO threads. It ensures that the cut thread is precise enough for most general applications and that common screws will fit the thread.

Q: What is the difference between an HSS-G and an HSS-E tap?

A: HSS-G stands for "High Speed Steel - Ground." The material is ideal for easily machinable steels. HSS-E also contains cobalt, which increases hardness and heat resistance, making it suitable for harder or stainless steels.

Q: Is this tap set suitable for blind holes?

A: Yes, the set is specifically designed for hand use in both through and blind holes. The three-piece set allows for a step-by-step process, so the thread can be cleanly cut to the bottom of the blind hole.

Q: What is the recommended torque?

A: The recommended torque depends heavily on the material and the lubricant. Since this is a hand tool, feel is crucial. Pay attention to the resistance when turning. If the resistance increases sharply, turn the tool back slightly to break the chips, and then continue the cut.