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Description
Technical data for the drill bit for metal, Ø38 mm, with reduced shank
| Technical data | |
|---|---|
| Working diameter of drill d | Ø38 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 Ø38 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 | 117 | 59 |
| KCast iron | 10-18 | 0.25 | 84 | 42 |
May be useful
Cutting parameters calculator
Ø38 mm HSS reduced-shank metal drill bit – an advanced industrial tool
High-performance 38 mm diameter drill bit with a reduced shank made of HSS is a tool for the most demanding production processes. The shank, reduced to 12.7 mm (half an inch), allows immediate mounting in standard drill holders. The product is designed for metal fabrication plants, industrial service facilities, and professional toolrooms.
Properties of the Varel Ø38 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 design provides a practical way to eliminate the mounting difficulties typical of larger-diameter tools. The polished working surface effectively dissipates heat from the machining zone, maintaining high productivity during extended operation in production environments.
Frequently asked questions
This tool is intended for machining S235 and S355 structural steels with a hardness not exceeding 35 HRC, as well as cast iron, aluminum, and brass. It should not be used in steels hardened above 35 HRC or in high-chromium grades.
At diameters exceeding 35 mm, cooling is practically essential for optimal results. Using suitable cutting fluids can extend drill bit life by up to 60 percent while providing better hole dimensional accuracy.
For S235 structural steel, we recommend a speed of 120-185 rpm, while for S355 steel, set 75-135 rpm. Exceeding these parameters results in excessive heat buildup and rapid deterioration of the cutting edges.
Product accessories
Countersink 45/90 DIN 335 C HSS cone countersink
Reference: 0000009863 In stock > 10 items
€52.63
€64.74 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 |
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