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Machine tap M33x2 DIN 374 B HSSE Narex
0000007057
Thread size: M33x261 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
€79.30 tax inc.
Net price: €64.47
Description
Material HSSE
Thread size M33x2
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M33x2 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M33x2 |
| Thread Pitch P | 2 mm |
| Overall Length l1 | 160 mm |
| Flute Length l2 | 30 mm |
| Shank Diameter d2 | 25 mm |
| Square Drive Size a | 20 mm |
| Tap Drill Diameter | 31 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 M33x2 tap has a reduced shank according to DIN 374: diameter 25 mm, square size 20 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 M33x2 thread.
M33x2 metric fine thread machine tap – Narex HSSE for structural applications
The M33x2 metric fine thread machine tap from Narex is designed for precision tapping of holes with a nonstandard diameter of 33 mm in machine structures. HSSE high-speed steel construction with 5% added cobalt ensures a hardness of 65-67 HRC and optimum tool life when machining materials with tensile strengths up to 800 MPa. The M33x2 metric fine thread offers greater strength than the M33x3.5 coarse thread while maintaining fast assembly. The Narex brand guarantees the highest manufacturing quality.
Technical specifications of the M33x2 Narex machine tap
- The Narex brand as a renowned cutting tool manufacturer with a long tradition, guarantees the highest manufacturing quality and consistent performance
- Nonstandard M33 size used in specialized applications where an intermediate diameter between M32 and M36 is required
- Fine thread with a 2 mm pitch offers higher tensile strength than the M33x3.5 coarse thread
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending cutting edge life
- Tolerance 6H according to DIN 374 ensures precise thread production and full interchangeability with fasteners
- Recommended tap drill diameter 31 mm for the M33x2 metric fine thread ensures optimal thread engagement
The M33x2 Narex machine tap is used in specialized machine structures and heavy industry where a nonstandard diameter with higher connection 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 | 48-193 | 96-386 |
| MStainless steel | 5-10 | 48-96 | 96-192 |
| KCast iron | 5-15 | 48-145 | 96-290 |
| NAluminum | 10-25 | 96-241 | 192-482 |
Thread preparation M33x2 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 31 mm
3 Tapping
M33x2
✓ 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 M33x2 fine thread provides approximately 75% higher tensile strength, better sealing, and greater resistance to self-loosening with a slightly longer assembly time.
The recommended tap drill diameter for the M33x2 metric fine thread is 31 mm. Precise hole machining ensures full thread engagement.
Narex is a reputable manufacturer with a long tradition, offering tools with consistent quality and repeatable geometric specifications. Narex taps offer good value for money.
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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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