BLACK AND BRONZE DRILL BIT 3/8″ REDUCED SHANK 1/2

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BLACK AND BRONZE DRILL BIT 3/8″ REDUCED SHANK 1/2 Technical Specifications
Diameter 1/2 in
Qty 1
Shank Type Straight With 3 Flats
High performance drill bits
135° split point, improves cutting efficiency and eliminated drill bit walking
Heavy-Duty High-Speed Steel Construction (M2) With Black & Bronze Finish
Standard Mechanic Length bits

1.High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
2.Universal 118° point shape for drilling a wide selection of materials.
3.Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance.
4.Ground flutes provide fast chip removal to maximize accuracy and efficiency along the full working surface of the bit.

1. If the drilled material is too hard (such as stainless steel), use a 3-6mm drill bit to make a small hole first, and then use a large drill bit to expand the hole.
2. The number of rotations of the electric drill for drilling hard objects should be between 80-120, the effect is better. The higher the number of rotations, the harder it is to drill, and the drill bit will be burnt out.
3. Since stainless steel contains more alloy components, its hardness and mechanical properties are higher. When drilling with a hand electric drill, it is necessary to apply sufficient pressure and the power of the motor is large enough. It is easier to use a bench drill.
4. Add coolant or cutting fluid to lower the temperature when drilling when possible, reduce the damage to the drill bit caused by the high temperature generated by rotation, and prolong the service life of the drill bit.
5. When drilling stainless steel, if the drilling diameter is more than 10mm and the thickness of the drilling hole is relatively large, it is best to choose a bench drilling machine with a power supply of 380v and a maximum wattage of 500w or more for processing.
6. For quenched and heat-treated steel, due to its high hardness, it needs to be annealed before processing to avoid drill bit failure or chipping damage. High-speed steel reduced shank twist drill bits set

Where Reduced Shank Fits
A reduced shank drill sits between the two main systems. The cutting diameter is larger than the shank, so a 16 mm, 20 mm, or sometimes 25 mm drill can still fit a 13 mm or 16 mm chuck. That is convenient for maintenance teams and small workshops, but it does not create the same rigidity or torque capacity as a Morse taper.

Buyer situation Reduced shank decision Risk to check
Occasional larger hole on a 13 mm chuck drill press Can be practical for low-volume work Chuck slipping and operator wobble 8PCS HSS Sliver Deming 1/2″ Reduced Shank Drill Bits Set With Aluminum Box
Repeated 18-25 mm holes in steel plate Move to Morse taper if the machine allows Torque demand can exceed chuck grip
Retail or maintenance assortment Useful as a limited convenience SKU Do not present it as heavy industrial tooling
Production drilling Prefer straight shank in proper holders or DIN 345 taper shank Runout and inconsistent hole quality
For distributors, reduced shank is best treated as a convenience bridge, not a replacement for taper shank drills. It belongs in maintenance and jobsite assortments, while DIN 345 Morse taper remains the better option for stable, repeated large-diameter drilling.  3/4 in. High Speed Steel Black Oxide Reduced Shank Specialty Drill Bit