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Hand Tap M17X1.5 DIN 2181/2 6H HSS
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  • Hand Tap M17X1.5 DIN 2181/2 6H HSS
  • Hand Tap M17X1.5 DIN 2181/2 6H HSS - nr. 1
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Hand Tap M17X1.5 DIN 2181/2 6H HSS

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Description

Technical data for the M17x1.5 hand tap

Technical data
Nominal diameter d1 mm M17
Thread pitch P mm 1.5 mm
Overall length l1 102 mm
Flute length l2 32 mm
Shank diameter d2 12.5 mm
Square drive size a 10 mm
Tap drill diameter 15.5 mm
Thread angle G 60°
Tap tolerance ISO2 6H
Fine-thread taps drawing

Roughing tap and finishing tap – how much material each removes

Division of work in the 1–2 set

The M17x1.5 thread is cut into the wall of a hole with a diameter of 15.5 mm. The thread groove extends 0.75 mm into the wall. A single tap would have to cut the entire groove at once, requiring substantial hand torque and risking breakage. The set divides this work into two passes.

Tapping an M17x1.5 hole: 15.5 mm hole, taps No. 1 and No. 2 in a cross section of the plate
Tapping an M17x1.5 hole: 15.5 mm hole, taps No. 1 and No. 2 in a cross section of the plate

The drawing shows the entire set in operation. Both taps have the same shank and the same length. They differ in their chamfer, the tapered tip: No. 1 has a chamfer spanning 8 threads, while No. 2 spans only 2 threads. The detail windows at the hole wall show how the thread groove deepens after each tap.

TapChamferChamfer angleMaterial removedHow it works in the hole
No. 1 – roughing taplong, 8 threads5°the main portion of the grooveenters smoothly and establishes thread alignment
No. 2 – finishing tapshort, 2 threads20°the remainder, to the full profilefollows the cut threads and produces the full 6H profile

How to distinguish the taps in the set

The chamfer on No. 1 is 4 times as long as the chamfer on No. 2 — the difference is immediately visible when you place them side by side. No. 1 has an incomplete thread profile; only No. 2 has the full profile. The number is also indicated on the shank: No. 1 has one ring, No. 2 has none. Keep the set together and always start with the roughing tap.

How to tap an M17x1.5 hole – sequence 1, 2

Hand tapping step by step

Thread M17x1.5 in four steps

ØDrilling

Drill bit 15.5 mm

1Roughing tap

Chamfer 8 threads

2Finishing tap

Chamfer 2 threads

✓Finished thread

Tolerance 6H

Turning sequence: half a turn clockwise, a quarter turn counterclockwise | Between taps: remove chips from the hole

Start with the hole. The drill diameter is easy to calculate: thread diameter 17 mm minus pitch 1.5 mm gives 15.5 mm. An undersized hole is a common cause of a tap twisting off in the workpiece.

Through hole or blind hole – how deep to drill

The set taps both types of holes. In a through hole, the thread extends through the full material thickness. In a blind hole, cut the thread to 42.5 mm, or 2.5 times the thread diameter (2.5 x 17 mm, shown as 2.5D in the drawing). Drill the hole deeper than the thread. The finishing tap has a chamfer spanning 2 threads, so approx. 2 incomplete threads remain near the bottom. The extra depth below the thread accommodates them along with the chips.

M17x1.5 thread in a through hole and a blind hole – cross sections with clearance for chips and the chamfer

No. 1 – the roughing tap establishes thread alignment

Fit the roughing tap in the tap wrench and position it perpendicular to the surface. Check the angle from two sides, for example with a square. Turn half a turn clockwise, then a quarter turn counterclockwise. Reversing breaks the chip into short pieces – a slight crunch is normal. The first threads determine whether the thread will be straight.

No. 2 – the finishing tap produces the full profile

Back out the roughing tap and remove chips from the hole. Screw the finishing tap into the cut threads by hand – it should engage them on its own. Continue turning at the same rhythm as with the roughing tap. The finishing tap removes the remaining material and cuts the groove to the full profile within tolerance 6H. When it screws in smoothly all the way, the thread is complete – check it with an M17x1.5 screw.

M17x1.5 fine-thread hand taps

M17X1.5 Hand Tap DIN 2181/2 6H HSS is designed for precision cutting of metric fine threads in steels and cast iron; in workshop applications, the M17x1.5 hand tap maintains a 60° profile and repeatable internal thread dimensions in class 6H.

Geometry and construction: size M17, pitch P=1.5; right-hand direction; high-speed steel (HSS), ground finish; straight flutes for controlled chip breaking and evacuation; straight shank with a square drive for use with a tap wrench; recommended drill 15.5 mm for proper thread engagement and stable axial guidance.

  • Pass integration. Using a two- or three-piece set completes the process to achieve a full profile, especially in hard-to-reach holes — M17x1.5 hand tap set.
  • Uniform cutting action. Progressive tap chamfers and hole entry chamfering reduce torque, stabilizing the thread starting zone.
  • Fit consistent with the tolerance class. The 6H internal thread mates with 6g threaded shafts, maintaining nominal clearance and a clean thread profile.
  • Surface quality. The ground cutting edge and straight flutes promote low surface roughness and reduce the need for corrections.

Reference standards and tolerances: design according to DIN 2181/2; metric profile according to ISO 68-1; pitch series according to ISO 261/262; internal thread tolerances according to ISO 965, class 6H. Hand Tap M17X1.5 DIN 2181/2 6H HSS provides controlled geometry and repeatable parameters; also suitable for maintenance applications is M17x1.5 hand tap set.

Stages of cutting an M17x1.5 thread with a 2-piece set: roughing tap and finishing tap


Roughing tap and finishing tap profiles

Frequently asked questions

The set consists of two taps — a roughing tap and a finishing tap, which guarantee a fully formed thread when used in sequence.

Yes, the set can be used in both through holes and blind holes, in accordance with DIN 2181 and class 6H.

High-speed steel (HSS) provides high durability, abrasion resistance, and stable operation even under demanding conditions.

Product accessories

Tap wrench No. 3

Reference: 085009 In stock > 10 items

€13.16

€16.18 brutto

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Hand Tap M17X1.5 DIN 2181/2 6H HSS

Hand Tap M17X1.5 DIN 2181/2 6H HSS

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