- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
navigate_next
navigate_next
navigate_next
Description
Material HSSE
Thread size M28x1.5
ChamferC (2–3) threads
Standard DIN 374
Technical data for the M28x1.5 left-hand HSSE INOX general-purpose 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 | C (2÷3) P |
| Thread tolerance | 6H |
Where chips remain in a straight-flute tap
The flute holds the chips until the tap is reversed out
The straight flute runs parallel to the tap axis. There is no helix to carry chips upward. The chamfer cutting edges are not ground at an angle, so they do not push chips downward. Short chips break into fragments and remain in the flute, next to the cutting edges that produced them. They leave the hole only when the tap is backed out. The M28x1.5 tap has a reduced shank to DIN 374: diameter 20 mm, square size 16 mm.
1
Straight flute – chips remain in the flute, next to the cutting edges that produced them.
2
Chamfer C: 2–3 incomplete threads on the tapered lead.
3
The tap rotates counterclockwise – this is how it cuts a left-hand thread.
4
Individual fragments exit at the top, onto the workpiece surface.
5
A few fragments fall below the tip and exit through the bottom of the hole.
6
Feed 1.5 mm/rev, equal to the pitch of the M28x1.5 thread.
M28x1.5 INOX left-hand machine tap – HSSE for left-hand threads
This model from the HSSE series is designed for producing M28x1.5 left-hand threads in stainless and structural steels and features a left-hand cutting direction. The M28x1.5 INOX left-hand machine tap features reversed flute geometry that ensures correct left-hand thread formation. With 5% cobalt, the tool maintains a hardness of 66 HRC even at cutting zone temperatures of up to 650°C. Form C with straight flutes provides universal use. The M28x1.5 HSSE left-hand machine tap is intended for toolrooms and manufacturers of special components.
Key benefits of the M28x1.5 left-hand tap for through and blind holes
- Left-hand thread used in components protected against self-loosening, drive shafts and screws securing grinding wheels that rotate clockwise
- Material versatility covering 304 and 316 austenitic stainless steels, structural steels up to 800 MPa, GGG40 ductile cast iron, and aluminum alloys
- Compatibility with ER32 holders and collets for precise clamping on machining centers with axial compensation and reversible rotation
- Precision to tolerance class 6H for demanding fit tolerances in series production of mechanical components requiring highly accurate left-hand threads
- Durability increased by the addition of cobalt in HSSE steel allows cutting 400-500 left-hand threads in structural steel with proper cooling
- M28x1.5 general-purpose left-hand machine tap with form C allows tapping of through holes and blind holes without changing the tool or parameters
The M28x1.5 left-hand machine tap for through and blind holes is used in toolrooms and prototype shops to manufacture special components. Cooling with an EP emulsion at a minimum concentration of 8% extends tool life. The tap drill diameter for the M28x1.5 left-hand thread is 26.5 mm.
Cutting data for the M28x1.5 left-hand HSSE INOX general-purpose machine tap
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 57-227 | 86-340 |
| MStainless steel / INOX | 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
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 26.5 mm
3 Tapping
M28x1.5
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: C (straight) | Application: general-purpose (through and blind 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
With proper cooling and lubrication, the M28x1.5 HSSE left-hand tap produces 400-600 threads in structural steel or 250-350 threads in stainless steel. Dry operation reduces tool life by 40-50%.
Yes, the M28x1.5 HSSE left-hand tap with 5% cobalt is designed for austenitic stainless steels 304 and 316. The cobalt addition increases thermal resistance to 650°C in the cutting zone.
M28x1.5 left-hand threads are used in components protected against self-loosening, clockwise-rotating drive shafts, and screws securing grinding wheels. They prevent the joint from loosening under vibration.
Product accessories
Hand Tap M28X1.5 LH DIN 2181/2 HSS Varel
Reference: 14346 In stock > 10 items
€47.37
€58.26 brutto
Reviews
No customer reviews for the moment.
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 M28x1.5 LH DIN 374 C HSSE Podgląd zdjęć produktu
01 / 01
Powiększenie 100%
Użyj strzałek, aby zmieniać zdjęcia. Powiększaj przyciskami albo gestem szczypania. Zamknij galerię klawiszem Escape.
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.