Draper HSS Metric Jobber Drill Bit - 3.5 x 70mm

This Draper HSS Metric Jobber Drill Bit is suitable for drilling into steel, cast iron, non-ferrous metals (like aluminum, brass, copper), and plastics.

HSS stands for High-Speed Steel, a type of steel alloy commonly used for drill bits due to its hardness, resistance to high temperatures, and durability.

These are international standards that specify the dimensions, quality, and performance requirements for drill bits, ensuring consistency and reliability.

This product comes in a pack containing 10 individual drill bits.

Yes, it is compatible with any standard drill chuck that can securely hold a 3.5mm shank. This includes most corded and cordless drills, as well as drill presses.

Keep the drill bit clean and dry after use. Store it in a way that protects the cutting edges from damage and prevents rust. Avoid excessive heat during drilling.

The drill bit has an overall length of 70mm.

Check that you are using the correct drill speed for the material. Ensure the bit is sharp and not dull. Apply a suitable cutting fluid or lubricant to reduce friction and heat. Verify the bit is securely held in the chuck and not slipping.

Ensure the drill bit is centered in the chuck and not wobbling. Use a center punch to mark the drilling point accurately. Apply steady, consistent pressure during drilling. Check if the bit is damaged or bent.

Back the drill bit out periodically during drilling to clear chips from the flutes. Reduce the drilling pressure. Ensure the hole depth is appropriate and you are not forcing the bit.