c.k tools T3291 porasarja — 19-osainen HSS-TiN-pinnoitettu sarja metalli- ja yleisporauksiin

c.k tools T3291 is a 19-piece HSS TiN-coated drill bit set intended for drilling into metal and a variety of general-purpose applications. The titanium nitride (TiN) coating enhances surface hardness and reduces friction, which helps extend cutting life compared with uncoated high-speed steel bits. The set includes a range of common diameters that cover typical workshop and maintenance tasks, making it suitable for both stationary and on-site use.

Advantages

The TiN coating provides improved wear resistance and reduced heat build-up during cutting, resulting in longer life of each drill bit and more consistent hole quality. HSS substrate ensures toughness and edge retention when drilling ferrous and non-ferrous metals as well as many general materials. The assortment of 19 sizes eliminates frequent bit changes for common drilling operations and supports efficient workflow in repair, fabrication and maintenance environments.

Suitable for

Key specifications

How to use

Select the appropriate drill bit size for the required hole diameter and secure it in the drill chuck with proper tightening. When drilling metal, mark the hole position and use a centre punch if precise location is required. Start drilling at low speed to establish the hole, then increase speed as appropriate for the material and bit size. Apply steady, moderate pressure and back out occasionally to clear chips. Use cutting fluid or lubricant when drilling harder metals to reduce heat and prolong bit life. After use, clean chips from flutes and store bits in their case to prevent damage.

Recommendations

For best results when drilling metals, use a suitable cutting lubricant, maintain correct drill speed for the material and bit diameter, and replace bits that show significant wear or loss of cutting edge. Store the set in a dry place to preserve the TiN coating and avoid hard impacts that can damage the cutting edges.