TIGHTFIT® THREADED SHANK DRILL BITS
TightFit® threaded shank drill bits are made of M2 or M7 High-Speed Steel, for use in drilling hard, high-strength alloys and tough, heat-resistant materials. The drill bits have a 135 degree split-point and a 1/4-28 UNF-2A threaded shank. The drill bits are available in three lengths: LONGS = 2-1/8″; SHORTS = 1- 1/4″; and STUBS = 1/2-5/8″ (threads not included in overall measurement). TightFit® threaded shank drill bits are black oxided to add lubricity, prevent corrosion while enhancing appearance, and furnished with a 5/16″ hex adapter for easy removal after drilling is complete.
TIGHTFIT® THREADED SHANK DRILL BITS
TightFit® 1/4″ hex shank drill bits are shorter than standard drill bits of the same diameter. They are made of M2 or M7 High-Speed Steel, for use in drilling hard, high-strength alloys and tough, heat-resistant materials. The drill bits have a 135 degree split-point and a 1/4″ hex power shank. The drill bits are available in two lengths: LONGS = 2-1/2″; SHORTS = 1-1/2″, and are slightly oversized (2-4 thousandths of an inch) to provide “clearance” for bolts, screws and rivets. TightFit® 1/4″ hex shank drill bits are black oxided to add lubricity, prevent corrosion while enhancing appearance.
DRILLING SUGGESTIONS
To reduce the chance of gear failure and to extend tool life, please follow these suggestions.
1. Reduce RPM speed and drilling pressure at drill “break through”.
2. Drill small holes first and then enlarge the holes progressively.
3. Peck drill deep holes to clear chips from the flutes.
4. Coolant use will extend tool life.
5. Re-point drill bits when they become dull.
CAUTION: Always wear safety glasses when using these tools. Do not use TightFit® threaded shank drill bits and attachments counter clockwise (in reverse). Do not exceed 2500 RPM. Keep tools out of the reach of children.