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Hand Tapping M17x2 DIN 2181/2 6H HSS Fra
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  • Hand Tapping M17x2 DIN 2181/2 6H HSS Fra
  • Hand Tapping M17x2 DIN 2181/2 6H HSS Fra - nr. 1
FRA

Hand Tap M17x2 DIN 2181/2 6H HSS Fra

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Description

Technical data for the M17x2 hand tap

Technical data
Nominal diameter d1 mm M17
Thread pitch P mm 2 mm
Overall length l1 80 mm
Flute length l2 22 mm
Shank diameter d2 12 mm
Square drive size a 9 mm
Tap drill diameter 15 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 M17x2 thread is cut into the wall of a hole with a diameter of 15 mm. The thread groove extends 1 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 M17x2 hole: 15 mm hole, taps No. 1 and No. 2 in a cross section of the plate
Tapping an M17x2 hole: 15 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 M17x2 hole – sequence 1, 2

Hand tapping step by step

Thread M17x2 in four steps

ØDrilling

Drill bit 15 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 2 mm gives 15 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.

M17x2 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 M17x2 screw.

M17x2 fine-thread hand taps

Hand Tap M17x2 DIN 2181/2 6H HSS is designed for cutting metric fine threads in structural and alloy steels; in workshop use, the M17x2 hand tap maintains a 60° thread angle and a stable internal thread fit in class 6H.

Design data: size M17, pitch P=2; right-hand direction; high-speed steel (HSS) construction, precision-ground cutting edge; straight flutes for uniform chip formation; straight shank with a square drive; 15.0 mm tap drill ensuring proper thread engagement and axial alignment during manual guidance.

  • Process stability — The progressive chamfer reduces edge loads, improving stability when entering the material.
  • Size and assembly clearance — Class 6H is compatible with 6g external threads, ensuring a repeatable fit.
  • Durability in service — The construction and HSS material support cutting edge life and a smooth thread surface when reversing to break chips.
  • Rapid formation of the profile — Effective guidance during roughing and finishing passes is facilitated by M17x2 hand tap set.

Applicable standards: construction according to DIN 2181/2; thread profile according to ISO 68-1; series and pitches according to ISO 261/262; tolerances according to ISO 965 (internal thread 6H). M17x2 Hand Tap Set DIN 2181/2 6H HSS maintains geometry and surface roughness parameters in one-off operations.

Stages of cutting an M17x2 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.

The HSS tool works well in low-carbon steel, aluminum, brass, and other materials with good machinability.

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 M17x2 DIN 2181/2 6H HSS Fra

Hand Tap M17x2 DIN 2181/2 6H HSS Fra

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