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Machine Tap M33x1.5 LH DIN 374 B HSSE
Fanar Narzędzia Fanar Narzędzia
0000011075
€80.92 tax inc.
Net price: €65.79
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W magazynie: 1 pcs.
Description
Material HSSE
Thread size M33x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M33x1.5 left-hand machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M33x1.5 |
| Thread Pitch P | 1.5 mm |
| Overall Length l1 | 160 mm |
| Flute Length l2 | 32 mm |
| Shank Diameter d2 | 25 mm |
| Square Drive Size a | 20 mm |
| Tap Drill Diameter | 31.5 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 M33x1.5 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 counterclockwise – this is how it cuts a left-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 M33x1.5 thread.
M33x1.5 left-hand machine tap for metric fine threads – HSSE for special applications
The M33x1.5 left-hand fine-thread machine tap from the HSSE series is designed for cutting internal left-hand threads with a nonstandard diameter of 33 mm and a pitch of 1.5 mm. Made of high-speed steel with 5% cobalt, it guarantees a hardness of 65-67 HRC and long cutting edge life even when machining difficult-to-machine materials. The M33x1.5 left-hand fine thread combines the advantages of a nonstandard diameter, a left-hand thread, and fine-thread leak-tightness.
Key features of the M33x1.5 left-hand fine-thread machine tap
- Left-hand thread direction (LH) used in components rotating clockwise, where a right-hand thread could loosen on its own
- Nonstandard M33 size used in specialized applications where standard M32 or M36 threads do not meet the requirements
- Fine thread with a 1.5 mm pitch ensures excellent joint leak-tightness and higher tensile 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
- Recommended tap drill diameter 31.5 mm for the M33x1.5 left-hand metric fine thread ensures an optimal thread profile
The M33x1.5 left-hand fine-thread machine tap is used in specialized machinery and hydraulic applications where a combination of a nonstandard diameter, a left-hand thread, and fine-thread leak-tightness is required. It is found in rotating machinery and specialized power units. 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 | 48-193 | 72-290 |
| MStainless steel | 5-10 | 48-96 | 72-144 |
| KCast iron | 5-15 | 48-145 | 72-218 |
| NAluminum | 10-25 | 96-241 | 144-362 |
Thread preparation M33x1.5 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 31.5 mm
3 Tapping
M33x1.5
✓ 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 M33x1.5 left-hand thread is used in specialized rotating machinery, hydraulic power units, and wherever a combination of a nonstandard diameter and a left-hand thread is required.
The recommended tap drill diameter for the M33x1.5 left-hand metric fine thread is 31.5 mm — the same as for a right-hand thread with the same pitch.
Yes, the M33x1.5 left-hand thread requires bolts and nuts with a left-hand thread in the nonstandard M33 diameter. These components must be specially ordered from suppliers.
Product accessories
Metal drill bit 31.5 NWKc HSS DIN 345 Baildon
Reference: 0405 In stock > 10 items
€32.89
€40.46 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 |
Machine Tap M33x1.5 LH DIN 374 B HSSE Podgląd zdjęć produktu
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