Polski 
- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
Material HSSE
Thread size M24
ChamferC (2–3) threads
Standard DIN 376
Technical data for the M24 blind-hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M24 |
| Thread Pitch P | 3 mm |
| Helix Angle | 35° |
| Overall Length l1 | 160 mm |
| Flute Length l2 | 38 mm |
| Length l3 | 55 mm |
| Shank Diameter d2 | 18 mm |
| Square Drive Size a | 14.5 mm |
| Tap Drill Diameter | 21 mm |
| Chamfer | C (2÷3) P |
| Thread tolerance | 6H |
How a spiral flute tap evacuates chips from a blind hole
The 35° flute works like a screw conveyor
The flutes of this tap follow a right-hand helix at an angle of 35° to the axis. The tap rotates clockwise and advances into the hole. Chips cut by the chamfer enter the flute, and the helix carries them upward like the screw in a meat grinder. The bottom of the hole stays clean, and the cutting edges do not encounter packed chips. The M24 x3 tap has a reduced shank according to DIN 376: diameter 18 mm, square size 14.5 mm.
1
The 35° spiral flute carries chips upward from the chamfer.
2
The stepped chip exits the hole and breaks into short pieces.
3
The tap rotates clockwise to cut a right-hand thread.
4
Chamfer C: 2–3 incomplete threads on the tapered lead.
5
Clearance below the tap tip – min. 2 thread pitches above the bottom.
6
Feed 3 mm/rev, equal to the pitch of the M24 x3 thread.
M24 spiral-flute machine tap – for blind holes
The M24 machine tap with a standard pitch of 3 mm cuts internal threads to tolerance class 6H in blind holes. The tool complies with DIN 376 – the Ø 18 mm shank is reduced relative to the thread diameter, allowing it to pass through the tapped hole and reach deeper. The 35° spiral flute carries chips upward instead of allowing them to accumulate at the bottom of the hole; the form C chamfer spans 2 to 3 threads, allowing the thread to extend close to the bottom. The material is HSSE high-speed steel with 5% cobalt and a hardness of 63–65 HRC, retaining its cutting properties at temperatures up to approximately 600 °C.
Technical specifications of the M24 machine tap
- Material range covers structural steels up to 900 MPa, alloy steels, austenitic stainless steels, and aluminum and copper alloys
- Cobalt addition increases resistance to tempering, allowing the tool to withstand higher temperatures in the cutting zone
- Chamfer C (2–3 threads) reduces the unthreaded portion at the bottom of the hole and allows threading close to the bottom
- Tolerance class 6H meets standard joint accuracy requirements in machine building and ensures interchangeability with M24 screws of tolerance class 6g
- Ø 18 mm shank with square drive fits tapping holders with axial compensation and ER collets
- Flute length 38 mm with an overall length of 160 mm, allows threading to a depth of up to 1.5 times the diameter
The M24 tap is used in steel structures, machine frames, and large cross-section bolted joints. The tap hole is drilled with a Ø 21 mm drill bit. At a pitch of 3 mm, tapping torque is substantial – a rigid holder with compensation and ample coolant are required.
Cutting data for the M24 blind-hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 66-265 | 198-795 |
| MStainless steel | 5-10 | 66-133 | 198-399 |
| KCast iron | 5-15 | 66-199 | 198-597 |
| NAluminum | 10-25 | 133-332 | 399-996 |
Thread preparation M24 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 21 mm
3 Tapping
M24
✓ Done!
Tolerance 6H
Standard: DIN 376 | Chamfer: C (spiral flute) | Application: blind holes
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
The M24 HSSE spiral-flute machine tap performs well in structural steels up to 900 MPa, austenitic stainless steels 304/316, aluminum, brass, and gray cast iron. Size M24 is used in steel structures and heavy machinery manufacturing.
For an M24x3 thread of tolerance class 6H, the recommended tap drill diameter is 21 mm. The hole tolerance range should be 21.0 to 21.28 mm. Exceeding the upper limit results in an incomplete thread profile.
Yes, cooling with an oil emulsion of at least 8% or with tapping oil is recommended and extends tool life by a factor of 2-3. Intensive cooling is required when machining stainless steels, while aluminum can be tapped with minimum quantity lubrication (MQL).
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.