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Hand Tap M24X1.5 LH 2181/2 HSS
0000012666
Thread size: M24x1,542 sizes of this tap
€48.55 tax inc.
Net price: €39.47
Description
Technical data for the M24x1.5 left-hand hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M24 |
| Thread pitch P mm | 1.5 mm |
| Overall length l1 | 140 mm |
| Flute length l2 | 20 mm |
| Shank diameter d2 | 18 mm |
| Square drive size a | 14.5 mm |
| Tap drill diameter | 22.5 mm |
| Thread angle G | 60° |
Roughing tap and finishing tap – how much material each removes
Division of work in the 1–2 set
The M24x1.5 LH thread is cut into the wall of a hole with a diameter of 22.5 mm. The thread groove extends 0.75 mm into the wall. A single tap would have to cut the entire groove at once — by hand, this means high resistance and a risk of breakage. The set divides this work into two passes.
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.
| Tap | Chamfer | Chamfer angle | Material removed | How it works in the hole |
|---|---|---|---|---|
| No. 1 – roughing tap | long, 8 threads | 5° | the main portion of the groove | enters smoothly and establishes thread alignment |
| No. 2 – finishing tap | short, 2 threads | 20° | the remainder, to the full profile | screws into the previously cut threads and produces the full thread 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 M24x1.5 LH hole – sequence 1, 2
Hand tapping step by step
Thread M24x1.5 LH in four steps
ØDrilling
Drill bit 22.5 mm
1Roughing tap
Chamfer 8 threads
2Finishing tap
Chamfer 2 threads
✓Finished thread
Thread M24x1.5 LH
Turning sequence: half a turn counterclockwise, a quarter turn clockwise | Between taps: remove chips from the hole
Start with the hole. The drill diameter is easy to calculate: thread diameter 24 mm minus pitch 1.5 mm gives 22.5 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 60 mm, or 2.5 times the thread diameter (2.5 x 24 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.
No. 1 – the roughing tap establishes thread alignment
Fit the roughing tap into a tap wrench and position it perpendicular to the surface. Check the angle from two sides, for example with a square. This is a left-hand thread, so turn in the opposite direction to usual: half a turn counterclockwise, then a quarter turn clockwise. 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. When it screws in smoothly all the way, the thread is complete – check it with an M24x1.5 LH screw.
Hand taps M24x1.5 left-hand fine thread - 2-piece set
M24x1.5 left-hand hand tap fine-thread HSS - a set of two professional hand taps for producing metric fine threads, type M24x1.5 left-hand DIN 2181 ISO DIN-13, with a 60° angle, in through and blind holes. Tapping takes place in two successive working steps and requires a suitable hand tap wrench. The starting tap with a 8P chamfer is used first, followed by the finishing tap with a 2P chamfer.
Available from us M24x1.5 left-hand hand taps are manufactured according to DIN 2181 from special HSS (High Speed Steel). This is a modern tool steel that provides greater productivity while maintaining high tapping precision. An advantage of M24x1.5 left-hand hand taps made of high-speed steel (HSS) is also their high resistance to demanding machining conditions and cutting edge resistance to potential damage during operation (breakage, cracks, chipping, nicks). The taps can machine hard materials in categories P1.2 – P1.3.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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