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Description
Material HSSE
Thread size M14x1
ChamferC (2–3) threads
Standard ISO 529
Technical data for the M14x1 blind hole tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M14x1 |
| Thread Pitch P | 1 mm |
| Helix Angle | 35° |
| Overall Length l1 | 87 mm |
| Flute Length l2 | 22 mm |
| Length l3 | 42 mm |
| Shank Diameter d2 | 11.2 mm |
| Square Drive Size a | 9 mm |
| Tap Drill Diameter | 13 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. The chip cut by the chamfer enters the flute, and the helix carries it upward like the auger in a meat grinder. The bottom of the hole stays clean, and the cutting edges do not encounter packed chips. The shank of the M14x1 tap has a diameter of 11.2 mm and a square size of 9 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 M14x1 thread.
M14x1 spiral-flute machine tap – metric fine thread for precision joints
In this range, Fra offers an M14x1 spiral-flute machine tap with a fine pitch of 1 mm, designed for leak-tight hydraulic joints. Made of HSSE steel with 5% cobalt, the tool meets ISO 529 requirements for fine threads and provides a hardness of 65-67 HRC. The 35° spiral flute guarantees controlled chip evacuation when tapping blind holes. The form C chamfer allows tapping close to the bottom of a blind hole, leaving a minimal incomplete thread length of 2-3 threads.
Advantages and applications of the M14x1 spiral-flute machine tap
- Compatibility with ER25 and ER32 tool holders and tapping chucks with axial compensation for CNC machining centers and automatic lathes
- Tolerance class 6H precision in accordance with ISO 529, guarantees the dimensional repeatability required in series production of precision components
- Designed for industrial hydraulics includes valve blocks, cylinder bodies, directional control valves, and pressure system components rated up to 400 bar
- Compliance with ISO 529 for fine threads ensures international compatibility and full interchangeability with tools from global manufacturers
- Durability of HSSE steel allows machining of structural steels up to 900 MPa, stainless steels, and aluminum and copper alloys
- 35° geometry with form C ensures consistent chip evacuation when tapping blind holes to a depth of 2D
The M14x1 spiral-flute tap is used in hydraulic systems and industrial pneumatics to produce leak-tight joints. The fine pitch of 1 mm provides a larger contact area than the standard M14x2 thread. The tap drill diameter for the M14x1 thread is 13 mm in accordance with fine-thread tables.
Cutting data for the M14x1 blind hole machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 114-455 | 114-455 |
| MStainless steel | 5-10 | 114-227 | 114-227 |
| KCast iron | 5-15 | 114-341 | 114-341 |
| NAluminum | 10-25 | 227-568 | 227-568 |
Thread preparation M14x1 in a blind hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 13 mm
3 Tapping
M14x1
✓ Done!
Tolerance 6H
Standard: ISO 529 | 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 M14x1 HSSE fine-thread machine tap in accordance with ISO 529 performs well in structural steels up to 900 MPa, stainless steels, aluminum, and brass. The fine pitch of 1 mm ensures leak-tight joints in hydraulic applications up to 400 bar.
For the M14x1 metric fine thread in tolerance class 6H, the tap drill diameter should be 13 mm. The permissible hole tolerance range is 13.0-13.2 mm. A smaller hole increases cutting torque and the risk of tool breakage.
Yes, cooling with an oil emulsion at a minimum concentration of 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 minimal lubrication.
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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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