Precision Twist Drill 010228 Hss Drill Bit 7/16 in R10B 6 Pack

Product Description

The PRECISION TWIST DRILL 010228 is a high speed steel (HSS) drill bit engineered for demanding trade and industrial drilling applications. Built to the R10B style specification with a 135-degree split point geometry, this bit delivers fast starts without a center punch and reduces walking on hard or smooth surfaces. The black oxide finish provides mild corrosion resistance and helps reduce friction during cutting. Sold in a pack of 6, the 010228 is a practical stocking choice for contractors, maintenance techs, and fabrication shops that go through bits regularly.

This 7/16-inch HSS drill bit is suited for use in metal fabrication, mechanical contracting, plumbing rough-in, electrical work, and general construction applications where accurate, clean holes in steel, cast iron, aluminum, and similar materials are required. The 135-degree split point is particularly effective when drilling into harder metals or when working on a drill press or hand drill without a pilot hole. The pack quantity of 6 supports job-site volume needs and reduces downtime from bit changeovers.

Key Features

• 135-degree split point tip reduces walking and eliminates the need for a center punch on most surfaces
• High speed steel construction retains hardness and edge integrity at elevated cutting temperatures
• R10B style geometry provides reliable chip evacuation during through-hole drilling
• Black oxide finish reduces friction and provides mild rust resistance during storage and use
• 7/16-inch diameter suits a wide range of mechanical, electrical, and plumbing hole requirements
• Pack of 6 supports continuous production or job-site use without frequent reordering

Compatibility

Designed as an OEM-style replacement and standard-stock drill bit compatible with 3/8-inch and 1/2-inch chuck corded drills, cordless drills, and drill presses accepting standard straight-shank bits at 7/16-inch diameter.

Installation Notes

Drill bits of this type are installed and used by electricians, plumbers, HVAC technicians, and general contractors working with metal or wood substrates. Always secure the workpiece before drilling and wear appropriate eye protection per OSHA general industry standards. Use cutting fluid when drilling into hardened steel to extend bit life and reduce heat buildup. Inspect bits for chipping or wear before each use and replace any bit that shows visible damage to the cutting edge.

Technical Specifications

• Drill Bit Size: 7/16 inches
• Material: High Speed Steel (HSS)
• Point Angle: 135 degrees split point
• Style: R10B
• Finish: Black oxide
• Type: PTD JL 135SP TYPE B
• Quantity per Pack: 6
• Unit of Measure: Pack

Standard Information

• Brand: PRECISION TWIST DRILL
• Manufacturer Part Number: 010228