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Machine tap M39x1.5 DIN 374 B HSSE Fra
11650
Thread size: M39x1,561 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
€103.58 tax inc.
Net price: €84.21
Description
Material HSSE
Thread size M39x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M39x1.5 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M39x1.5 |
| Thread Pitch P | 1.5 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 | 37.5 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 M39x1.5 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 1.5 mm/rev, equal to the pitch of the M39x1.5 thread.
M39x1.5 fine-thread machine tap – Fra HSSE for specialized hydraulics
The Fra M39x1.5 fine-thread machine tap in the HSSE series is designed for cutting internal threads with a nonstandard diameter of 39 mm in industrial hydraulic components. Its high-speed steel construction with 5% cobalt provides a hardness of 65-67 HRC and high thermal resistance in the cutting zone up to 650°C. The M39x1.5 fine thread combines a nonstandard diameter with a standard hydraulic pitch of 1.5 mm, ensuring excellent sealing performance in specialized applications.
Key features of the Fra M39x1.5 machine tap
- Manufacturer Fra as a specialist in special-purpose taps, guarantees high manufacturing quality and accurate metric fine thread geometry
- Nonstandard M39 size used in specialized hydraulic applications requiring an intermediate diameter between M36 and M42
- Fine thread with a 1.5 mm pitch is standard in industrial hydraulics, providing excellent leak tightness at high pressures
- HSSE steel with 5% cobalt ensures a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life
- The 6H tolerance in accordance with DIN 374 ensures thread accuracy and full interchangeability with fasteners
- The recommended hole diameter of 37.5 mm for the M39x1.5 metric fine thread ensures an optimal percentage of thread engagement
The Fra M39x1.5 machine tap is used in specialized hydraulic applications, the manufacture of nonstandard valve blocks, and prototyping of heavy-duty hydraulic components. The fine thread provides good joint sealing at high pressures. Cooling with an emulsion containing EP additives 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 | 62-244 |
| MStainless steel | 5-10 | 41-82 | 62-123 |
| KCast iron | 5-15 | 41-122 | 62-183 |
| NAluminum | 10-25 | 82-204 | 123-306 |
Thread preparation M39x1.5 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 37.5 mm
3 Tapping
M39x1.5
✓ 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 M39x1.5 thread is used in specialized hydraulic applications, prototyping and wherever standard M36 or M42 sizes do not meet flow or dimensional requirements.
The recommended tap drill diameter for the M39x1.5 metric fine thread is 37.5 mm. Precise hole machining is essential for leak-tight hydraulic connections.
Fra is a specialist in special and metric fine thread taps, offering tools with high manufacturing quality and precise geometry. Fra taps are particularly recommended for nonstandard threads.
Product accessories
Metal drill bit 37.5 NWKc HSS DIN 345 Werko
Reference: 0420 In stock > 10 items
€44.74
€55.03 brutto
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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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