Polski 
- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
Material HSSE
Thread size M12
Number of pieces3 pcs
Tolerance 6H ISO2
Technical data for the M12 hand tap
| Technical data | |
|---|---|
| Thread Diameter d1 | M12 |
| Thread Pitch P | 1.75 mm |
| Overall Length l1 | 75 mm |
| Flute Length l2 | 24 mm |
| Shank Diameter d2 | 9 mm |
| Square Drive Width Across Flats a | 7 mm |
| Tap Drill Hole | 10.2 mm |
Roughing, intermediate, and finishing taps – how much material each removes
Division of work in the 1–2–3 set
The M12 x1.75 thread is formed in the wall of a hole with a diameter of 10.2 mm. The thread groove extends 0.9 mm into the wall. A single tap would have to cut the entire groove at once – by hand, this creates high resistance and a risk of breakage. The set divides this work into three layers.
The drawing shows the entire set in operation. All three taps have the same shank and the same length. They differ in chamfer length: No. 1 has a taper spanning 7–10 threads, while No. 3 spans only 1–2 threads. The detail views at the hole wall show how the thread groove deepens after each tap.
| Tap | Chamfer | Material removed | How it works in the hole |
|---|---|---|---|
| No. 1 – roughing tap | long, 7–10 threads | approx. 60% | enters smoothly and establishes thread alignment |
| No. 2 – intermediate | medium, 3–5 threads | approx. 30% | screws into the previously cut threads and starts cutting only deeper in the hole |
| No. 3 – finishing tap | short, 1–2 threads | approx. 10% + sizing | turns easily and produces the full 6H profile |
How to identify the tap numbers in the set
The chamfer is the tapered end of the tap. No. 1 has the longest chamfer and No. 3 the shortest – the difference is immediately visible when they are placed side by side. No. 1 and No. 2 have shallower thread profiles; only No. 3 has the full profile. Keep the set together and always start with the roughing tap.
How to tap an M12 hole – sequence 1, 2, 3
Hand tapping step by step
Thread M12 x1.75 in five steps
ØDrilling
Drill bit 10.2 mm
1Roughing tap
Removes approx. 60%
2Intermediate
Removes approx. 30%
3Finishing tap
Removes approx. 10%
✓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 12 mm minus pitch 1.75 mm gives 10.25 mm — in practice, use a 10.2 mm drill bit. 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 18 mm, or 1.5 times the thread diameter (1.5 x 12 mm, shown as 1.5D in the drawing). Drill the hole deeper than the thread. The clearance below the thread accommodates chips and the finishing tap 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 and No. 3 – deepening and full profile
Unscrew the roughing tap and remove chips from the hole. Screw the intermediate tap by hand into the previously cut threads – it should engage them naturally. It turns easily at first and starts cutting only deeper in the hole. The finishing tap enters with almost no resistance and cuts the final portion of the profile only at the end. When it screws smoothly all the way in, the thread is ready – check it with an M12 screw.
M12 HSSE DIN 352 hand tap – 3-piece set for stainless and difficult-to-machine steels
The M12 HSSE hand tap set is a professional set of three tools for cutting internal threads with a diameter of 12 mm and a pitch of 1.75 mm in difficult-to-machine materials. M12 hand taps made of HSSE cobalt high-speed steel and conforming to DIN 352 provide increased durability and heat resistance, making them an ideal choice for stainless, acid-resistant, and alloy steels.
Key advantages of the M12 HSSE tap set
- 3-piece set (roughing, intermediate, and finishing taps) – cutting in three stages distributes the load in difficult materials
- HSSE cobalt steel (5% Co) – 2.5 times the tool life of standard HSS in stainless steels
- High-temperature resistance – retains cutting edge hardness even during intensive cutting
- Tolerance 6H according to DIN 352 – precise fit with M12 screws of tolerance class 6g
- Versatile M12 diameter – one of the most common sizes in the food and chemical industries
The M12 HSSE hand tap set is suitable for food processing plants, the chemical industry, and any application where stainless steels predominate. To drill the hole for an M12 thread, use a drill bit with a diameter of 10.2 mm. Apply generous lubrication with tapping oil for stainless steels.
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
HSSE contains 5% cobalt, which increases heat resistance and durability. Ideal for stainless and difficult-to-machine steels.
Yes, stainless steel heats up during cutting. Regular HSS quickly loses its sharpness, while HSSE retains its hardness at higher temperatures.
Use a 10.2 mm drill bit for an M12 thread. HSS-Co cobalt drill bits or solid carbide (VHM) drill bits are recommended for stainless steel.
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
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.