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Machine tap M28x1.5 DIN 374 B HSSE
0000007000
Thread size: M28x1,561 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
€56.64 tax inc.
Net price: €46.05
Description
Material HSSE
Thread size M28x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M28x1.5 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M28x1.5 |
| Thread Pitch P | 1.5 mm |
| Overall Length l1 | 140 mm |
| Flute Length l2 | 27 mm |
| Shank Diameter d2 | 20 mm |
| Square Drive Size a | 16 mm |
| Tap Drill Diameter | 26.5 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 M28x1.5 tap has a reduced shank according to DIN 374: diameter 20 mm, square size 16 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 M28x1.5 thread.
M28x1.5 fine thread machine tap – HSSE for industrial hydraulics
The M28x1.5 metric fine thread machine tap is a specialized tool for cutting internal threads with a nonstandard diameter of 28 mm in industrial hydraulic components. HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 65-67 HRC and optimum tool life when machining difficult-to-machine materials. The M28x1.5 metric fine thread is used in specialized hydraulic applications where standard M27 or M30 sizes do not meet flow or structural strength requirements.
Key advantages of the M28x1.5 metric fine thread machine tap
- Nonstandard M28 size used in specialized hydraulic applications requiring an intermediate diameter between M27 and M30
- Fine thread with a 1.5 mm pitch ensures excellent sealing of hydraulic connections while maintaining high mechanical strength
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, essential for machining alloy steels
- Tolerance 6H according to DIN 374 ensures precise thread production and full interchangeability with fasteners
- Compatibility with ER32 and ER40 tool holders and collets for precise clamping on CNC machining centers
- Recommended tap drill diameter 26.5 mm for the M28x1.5 metric fine thread ensures optimal thread engagement
The M28x1.5 machine tap is used in specialized hydraulic applications, the production of custom valve blocks, and the prototyping of hydraulic power components. The metric fine thread provides good 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 | 57-227 | 86-340 |
| MStainless steel | 5-10 | 57-114 | 86-171 |
| KCast iron | 5-15 | 57-171 | 86-256 |
| NAluminum | 10-25 | 114-284 | 171-426 |
Thread preparation M28x1.5 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 26.5 mm
3 Tapping
M28x1.5
✓ 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 M28x1.5 thread is used in specialized hydraulic applications, prototyping and wherever standard M27 or M30 sizes do not meet flow or dimensional requirements.
The recommended tap drill diameter for the M28x1.5 metric fine thread is 26.5 mm. Precise hole machining is essential for leak-tight hydraulic connections.
M28 is a nonstandard size, and fasteners may require a special order. Checking availability with industrial hydraulics suppliers in advance is recommended.
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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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