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Machine Tap M39X2 DIN 374 B HSSE
Narex Zdanice spol. s r.o. Narex Zdanice spol. s r.o.
877200
Thread size: M39x261 sizes of this tap
M5x0,5M10x1M10x1,25M11x0,75M12x1M12x1,25M12x1,5M14x1M14x1,25M14x1,5M15x1M15x1,25M15x1,5M16x1M16x1,5M17x1M18x1M18x1,5M18x2M20x0,75M20x1M20x1,25M20x1,5M20x2M22x1,5M22x2M24x1M24x1,5M24x2M25x1M25x1,5M25x2M26x1,5M27x1,5M28x1,5M30x1,5M30x2M30x3M32x1M32x1,5M32x2M33x1,5M33x2M35x1,5M36x1,5M36x2M36x3M38x1,5M39x1,5M39x2M40x1,5M42x1,5M42x2M42x3M48x1,5M50x2M52x2M56x3M60x3M64x3M64x4
€110.05 tax inc.
Net price: €89.47
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W magazynie: 2 pcs.
Description
Material HSSE
Thread size M39x2
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M39x2 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M39x2 |
| Thread Pitch P | 2 mm |
| Overall Length l1 | 170 mm |
| Flute Length l2 | 30 mm |
| Shank Diameter d2 | 32 mm |
| Square Drive Size a | 24 mm |
| Tap Drill Diameter | 37 mm |
| Chamfer | B (3.5÷5.5) P |
| Thread tolerance | 6H |
How the type B through-hole chamfer pushes chips down the hole
Chips exit at the bottom instead of returning through the thread
The form B chamfer for through holes has a chip breaker at the tip of the tap – an angled cut in the cutting edges. The chip breaker directs the chip down the hole, ahead of the tap tip. The chip curls into a coil, breaks into short pieces and exits the hole on the other side of the workpiece. The threads already cut remain clean because the chip does not pass through them on its way up. The M39x2 tap has a reduced shank according to DIN 374: diameter 32 mm, square size 24 mm.
1
Straight flute – chips do not enter it; the flute carries lubricant to the cutting edges.
2
The chip breaker at the tip of the tap directs chips down the hole.
3
The tap rotates clockwise to cut a right-hand thread.
4
B chamfer: 3.5–5.5 incomplete threads on the entry taper.
5
The chips break into segments: individual pieces at the top of the hole, with progressively more farther down. They fall out below the workpiece.
6
Feed 2 mm/rev, equal to the pitch of the M39x2 thread.
M39x2 metric fine thread machine tap – HSSE for special designs
The M39x2 fine thread machine tap is designed for precision tapping of holes with a nonstandard diameter of 39 mm in special structures. Its HSSE high-speed steel construction with 5% cobalt guarantees a hardness of 65-67 HRC and optimum tool life when machining materials with a strength of up to 800 MPa. The M39x2 fine thread offers higher strength than the M39x4 coarse thread while maintaining relatively fast assembly in applications with a nonstandard diameter.
Technical specifications of the M39x2 metric fine thread machine tap
- Nonstandard M39 size used in specialized applications where an intermediate diameter between M36 and M42 is required
- Fine thread with a 2 mm pitch offers twice the tensile strength of the M39x4 coarse thread
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, essential for machining alloy steels
- The 6H tolerance in accordance with DIN 374 ensures thread accuracy and full interchangeability with fasteners
- Compatibility with ER40 holders and collets for precise clamping on CNC machining centers
- The recommended hole diameter of 37 mm for the M39x2 metric fine thread ensures an optimal percentage of thread engagement
The M39x2 machine tap is used in specialized machine designs and heavy industry where a nonstandard diameter with higher joint strength is required. Form B with straight flutes directs chips forward. Cooling with an oil emulsion at a concentration of 8-10% is recommended.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 41-163 | 82-326 |
| MStainless steel | 5-10 | 41-82 | 82-164 |
| KCast iron | 5-15 | 41-122 | 82-244 |
| NAluminum | 10-25 | 82-204 | 164-408 |
Thread preparation M39x2 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 37 mm
3 Tapping
M39x2
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: B (straight) | Application: through 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 M39x2 fine thread provides approximately 100% higher tensile strength, better sealing, and greater resistance to self-loosening with a slightly longer assembly time.
The recommended tap drill diameter for the M39x2 metric fine thread is 37 mm. Precise hole machining ensures full thread engagement.
M39 is a nonstandard size, and fasteners may require a special order. M39x2 fine thread fasteners are available from specialist industrial suppliers.
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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 |
Machine Tap M39X2 DIN 374 B HSSE Podgląd zdjęć produktu
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