Polski 
- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Hand Tap M12X1.5 LH DIN2181/2 6H HSS
0000003552
Thread size: M12x1,542 sizes of this tap
€15.86 tax inc.
Net price: €12.89
Description
Technical data for the M12x1.5 left-hand hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M12 |
| Thread pitch P mm | 1.5 mm |
| Overall length l1 | 70 mm |
| Flute length l2 | 20 mm |
| Shank diameter d2 | 9 mm |
| Square drive size a | 7 mm |
| Tap drill diameter | 10.5 mm |
| Thread angle G | 60° |
| Tap tolerance | ISO2 6H |
Roughing tap and finishing tap – how much material each removes
Division of work in the 1–2 set
The M12x1.5 LH thread is cut into the wall of a hole with a diameter of 10.5 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 | follows 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 M12x1.5 LH hole – sequence 1, 2
Hand tapping step by step
Thread M12x1.5 LH in four steps
ØDrilling
Drill bit 10.5 mm
1Roughing tap
Chamfer 8 threads
2Finishing tap
Chamfer 2 threads
✓Finished thread
Tolerance 6H
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 12 mm minus pitch 1.5 mm gives 10.5 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 30 mm, or 2.5 times the thread diameter (2.5 x 12 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
Unscrew the roughing tap and remove chips from the hole. Screw the finishing tap by hand into the cut threads — it should engage them naturally. Continue with the same turning sequence as for the roughing tap. The finishing tap removes the remaining material and cuts the groove to its full profile within 6H tolerance. Once it screws smoothly all the way in, the thread is complete — check it with an M12x1.5 LH screw.
Left-hand metric fine hand taps M12x1.5
M12x1.5 left-hand hand tap DIN 2181 6H HSS is a 2-piece set for producing left-hand metric fine threads with a pitch of 1.5 mm in class 6H; compliance with DIN 2181 covers profile dimensions and tolerances. The set includes a roughing tap and a finishing tap for use in through holes and blind holes.
High-speed steel (HSS) construction ensures a durable cutting edge and dimensional repeatability with a tap drill diameter of 10.5 mm. The roughing tap with a longer chamfer stabilizes entry and chip formation, while the finishing tap with a shorter chamfer brings the profile to full height in accordance with ISO 2 (6H). The square drive fits standard tap wrenches, ensuring axial guidance. The geometry with a guiding chamfer facilitates self-centering and even cutting edge loading. The metric profile with a 60° angle corresponds to the M fine-thread profile.
- 2-piece set – roughing tap and finishing tap used in sequence.
- HSS high-speed steel – wear resistance in steels and alloys.
- Left-hand design – reliable production of M12x1.5 left-hand threads.
- Operation with a tap wrench – the square drive ensures control of axial alignment.
- 6H dimensional conformity – ISO 2 internal thread fit.
Specifications meet DIN 2181; M12x1.5 left-hand fine-thread hand taps ensure a precise profile, and The M12x1.5 left-hand hand tap set covers the complete cutting sequence from starting to finishing.
Stages of cutting an M12x1.5 left-hand thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
LH means a left-hand thread, cut in the opposite direction to a standard right-hand thread.
Yes, M12x1.5 left-hand hand taps are suitable for both through holes and blind holes.
M12x1.5 left-hand HSS taps are suitable for low-carbon steel, aluminum, brass, and other metals with good machinability.
Product accessories
Reviews
No customer reviews for the moment.
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 |
Recommended for you
Viewed products
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.