Titanium-Coated Parabolic Flute HSS Drill Bits for Fast Chip Evacuation & Deep Hole Drilling

Specification
Material: HSS-M2 / HSS-M35 (5% Cobalt) / HSS 4341
Flute Design: Parabolic
Coating: TiN (Titanium Nitride) – Gold
Manufacturing: Fully Ground
Point Angle: 118° / 135° Split Point
Cutting Diameter: 3mm – 13mm (Metric) / Imperial Sizes Available
Shank Type: Straight Shank / Tri-Flat Shank / Hex Shank
Packaging: Plastic Box (Single Size / Set / OEM packaging available)
Application: Deep hole drilling and continuous-duty drilling in steel, cast iron, and non-ferrous metals where standard flute geometry causes chip packing or heat buildup

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★ Parabolic Flute Geometry

· The wider, deeper flute channel moves chips out of the hole faster than a standard flute, reducing the chance of chip packing during deep or continuous drilling

· Lower cutting resistance means less heat builds up at the cutting edge, which helps hold tool life on longer production runs

· The design keeps working at higher feed rates without chip re-cutting, which is where standard flutes typically start to struggle

★ TiN Coating (Gold)

· The coating reduces friction between the drill bit and the workpiece, which lowers cutting temperature and reduces built-up edge on the flutes

· Surface hardness is higher than uncoated HSS, which slows edge wear on abrasive or work-hardening materials

· The gold finish also gives buyers a clear visual way to separate coated stock from bright or black oxide finishes on the shelf or in a mixed inventory

★ Plastic Box Packaging

· The box holds each bit in a fixed slot, so cutting edges don't contact each other or shift during shipping and warehouse handling

· Protects the coating and flute edges from surface damage before the product reaches the end user

· Size and label area on the case support OEM private label — buyers can apply their own branding without changing the internal tray layout or bit arrangement

★ Frequently Asked Questions

If a drill bit has a gold (TiN) coating, does that mean it also has a parabolic flute?

No. Flute geometry and coating are two separate specifications. The flute shape (parabolic vs. standard) determines how chips clear the hole; the coating affects friction and edge wear on the surface. A bit can have a gold TiN coating over a standard flute, or a parabolic flute with no coating at all. Since flute shape isn't always clear from product photos, buyers sourcing for deep-hole or high-volume applications should confirm both specs directly with the supplier rather than assuming from color alone.

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