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Machine Tap M56x3 DIN 374 B HSSE 6H
0000012844
Thread size: M56x361 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
€462.87 tax inc.
Net price: €376.32
Description
Material HSSE
Thread size M56x3
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M56x3 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M56x3 |
| Thread Pitch P | 3 mm |
| Overall Length l1 | 225 mm |
| Flute Length l2 | 50 mm |
| Shank Diameter d2 | 40 mm |
| Square Drive Size a | 32 mm |
| Tap Drill Diameter | 53 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 M56x3 tap has a reduced shank according to DIN 374: diameter 40 mm, square size 32 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 3 mm/rev, equal to the pitch of the M56x3 thread.
M56x3 machine tap for metric fine threads – HSSE for heavy structures
The M56x3 machine tap for metric fine threads is designed for precision tapping of very large-diameter 56 mm holes in heavy structures. HSSE high-speed steel construction with 5% cobalt ensures a hardness of 65-67 HRC and optimal durability when machining materials with tensile strength up to 800 MPa. The M56x3 metric fine thread offers significantly higher strength than the M56x5.5 coarse thread while maintaining relatively fast assembly in industrial applications.
Technical specifications of the M56x3 metric fine thread machine tap
- Fine thread with a 3 mm pitch offers nearly twice the tensile strength of the M56x5.5 coarse thread
- Increased load-bearing area of the thread of the metric fine thread results in more uniform load distribution and greater resistance to pulsation
- 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 specialized holders for large-diameter threads on CNC machining centers
- The recommended hole diameter of 53 mm for the M56x3 metric fine thread ensures an optimal percentage of thread engagement
The M56x3 machine tap is used in heavy machinery manufacturing, the largest steel structures, and the power industry. The metric fine thread provides better sealing than a coarse thread under high loads. 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 | 28-114 | 84-342 |
| MStainless steel | 5-10 | 28-57 | 84-171 |
| KCast iron | 5-15 | 28-85 | 84-255 |
| NAluminum | 10-25 | 57-142 | 171-426 |
Thread preparation M56x3 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 53 mm
3 Tapping
M56x3
✓ 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 M56x3 metric fine thread provides nearly 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 M56x3 metric fine thread is 53 mm. Precise hole machining ensures full thread engagement.
The M56x3 thread is used in heavy machinery manufacturing, the largest steel structures, the power industry, and wherever high joint strength is required.
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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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