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Description
Technical data for the drill bit for metal, Ø37 mm, with reduced shank
| Technical data | |
|---|---|
| Working diameter of drill d | Ø37 mm |
| Overall length l1 | 152 mm |
| Flute length l2 | 65 mm |
| Shank diameter - 1.2" | 12.7 mm |
- 1/2 inch reduced shank – mounting without adapters
- Drilling in steels up to 35 HRC
- High-quality HSS steel
- IT11 tolerance (±130 µm)
- Ground surface – low roughness
Cutting data for the Ø37 mm HSS NWKa drill bit
| Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Spindle speed n [rpm] | Total feed rate [mm/min] |
|---|---|---|---|---|
| PSteel | 14-25 | 0.25 | 120 | 60 |
| KCast iron | 10-18 | 0.25 | 86 | 43 |
May be useful
Cutting parameters calculator
Ø37 mm HSS reduced-shank metal drill bit – a tool for manufacturing plants
Professional extra-long drill Ø37 mm high-speed steel (HSS) drill bit with a reduced shank is a solution for the most demanding heavy industry applications. The 12.7 mm (half-inch) diameter shank fits directly into standard chucks without additional mounting components. The tool is developed for maintenance departments, series production, and shops machining steel structures.
Key specifications of the Varel Ø37 mm reduced-shank drill bit
- 1/2 inch reduced shank – mounting without adapters
- Drilling in steels up to 35 HRC
- High-quality HSS steel
- IT11 tolerance (±130 µm)
- Ground surface – low roughness
The reduced-shank geometry is an innovative solution to mounting large tools in standard machines. Smoothing the surface by grinding limits drill bit heat buildup, ensuring stable cutting performance during intensive use in industrial production.
Frequently asked questions
This drill bit works effectively in S235 and S355 structural steels with a maximum hardness of 35 HRC, as well as in gray cast iron, aluminum alloys, and brass. We do not recommend use in steels hardened above 35 HRC or in austenitic stainless steel grades.
Dry drilling at such large diameters is strongly discouraged and can rapidly destroy the tool. Proper use of an emulsion or oil extends drill bit life by up to 60 percent and significantly improves hole quality.
For S235 steel, we recommend a setting of 125-190 rpm; for S355 steel, the range is 80-140 rpm. Excessive speeds cause excessive heat generation and accelerated loss of the tool's cutting ability.
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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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