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Machine Tap M12x1 DIN 374/35 C SE Fra
728727
€18.45 tax inc.
Net price: €15.00
Description
Material HSSE
Thread size M12x1
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M12x1 blind hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M12x1 |
| Thread Pitch P | 1 mm |
| Helix Angle | 35° |
| Overall Length l1 | 100 mm |
| Flute Length l2 | 15 mm |
| Length l3 | 42 mm |
| Shank Diameter d2 | 9 mm |
| Square Drive Size a | 7 mm |
| Tap Drill Diameter | 11 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 auger in a meat grinder. The bottom of the hole stays clear, and the cutting edges do not encounter packed chips. The M12x1 tap has a reduced shank to DIN 374: diameter 9 mm, square drive 7 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 1 mm/rev, equal to the pitch of the M12x1 thread.
M12x1 spiral flute machine tap – for metric fine threads
In this range, manufacturer Fra offers an M12x1 spiral flute machine tap with a fine pitch of 1 mm for precision mechanical joints. Made of HSSE steel with 5% cobalt, the tool meets DIN 374 requirements for fine threads and provides a hardness of 65-67 HRC. The 35° spiral flute ensures controlled chip evacuation when tapping blind holes. The form C chamfer allows tapping close to the bottom of a blind hole, with a minimal unthreaded portion of 2-3 threads.
Advantages and applications of the M12x1 spiral-flute machine tap
- Material versatility covering structural steels up to 900 MPa, alloy steels, austenitic stainless steels 304/316, aluminum, and copper alloys
- Durability of HSSE steel with 5% cobalt allows operation at temperatures up to 650°C in the cutting zone without loss of mechanical properties
- Compatibility with ER25 holders and collets for precise clamping on machining centers with axial compensation
- Precision to tolerance class 6H for demanding fit tolerances in series production of mechanical and hydraulic components with stringent requirements
- Conforms to DIN 374 ensures standardized dimensions for metric fine threads and full interchangeability with tools from European manufacturers
- 35° geometry with form C ensures consistent chip evacuation when tapping blind holes to a depth of 2D
The M12x1 spiral flute tap is used in toolrooms and prototype shops for CNC machining of precision components. Cooling with an oil emulsion at a minimum concentration of 8% or with tapping oil increases tool life by a factor of 2-3. The tap drill diameter for the M12x1 thread is 11.0 mm according to fine thread tables.
Cutting data for the M12x1 blind hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 133-531 | 133-531 |
| MStainless steel | 5-10 | 133-265 | 133-265 |
| KCast iron | 5-15 | 133-398 | 133-398 |
| NAluminum | 10-25 | 265-663 | 265-663 |
Thread preparation M12x1 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 11 mm
3 Tapping
M12x1
✓ Done!
Tolerance 6H
Standard: DIN 374 | 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 M12x1 HSSE fine thread machine tap is suitable for structural steels up to 900 MPa, austenitic stainless steels 304/316, aluminum, and brass. The fine pitch of 1 mm provides improved joint sealing in hydraulic applications.
For the M12x1 metric fine thread in tolerance class 6H, the recommended tap drill diameter is 11.0 mm. The hole tolerance zone should fall within the range of 11.0 to 11.2 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
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| 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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