Irwin 10221 Unibit #21 HSS 10-Step Drill Bit

Product Description

Irwin® Unibit® Step Drill, Hole Enlarging, Imperial, #21, 13/16 in Minimum Hole Dia, 1-3/8 in Maximum Hole Dia, 10 Steps, 1/8 in Step Depth, 10 Hole Sizes, 1 Flutes, 7/16 in Shank, 3-Flat Shank, SpeedPoint® Point, HSS Cutting Edge, HSS, Bright, Applicable Materials: Aluminum, Brass, Copper, Laminates, Plastic and Stainless Steel

Irwin® Unibit® step drill bits are ideal for drilling holes in just about any type of thin material. General purpose high speed steel Unibit® step drill bits are perfect for use in mild steel, copper, brass, aluminum, plexiglass, wood, and laminate. Our titanium nitride coated (TiN) bits resist heat and friction, which extends the life of the cutting edge six times longer than standard step drills. And, our cobalt step drill bits are engineered with m35 cobalt steel for maximum life when drilling in the toughest steel, including stainless steel. Most Unibit® step drills are designed with a SpeedPoint® tip that guarantees fast starts. Theyre manufactured with a single flute cutting edge that drills multiple sizes of true, round holes with precise step control. Plus, the hole sizes are permanently laser etched on the inside of the flute, so they can be easily identified throughout the life of the bit.

 

PACKAGE DESCRIPTION

Package Quantity: 1/PK

 

APPLICATION

For drilling holes into thin materials

 

FEATURES

• Single flute cutting edge for greater control through steps
• 3 flatted shank prevents slipping in drill chuck
• Patented single flute cutting edge gives the user a true round hole every time
• Geometry of single flute cutting edge drills true, round holes and provides maximum step control
• Laser etched sizes inside flute for easy and permanent hole size identification

 

SPECIFICATIONS

Type:	Hole Enlarging
Drill Diameter Measurement System:	Imperial
Letter/Wire Size:	#21
Minimum Hole Diameter:	13/16
Maximum Hole Diameter:	1-3/8
Number of Steps:	10
Step Depth:	1/8
Number of Hole Sizes:	10
Number of Flutes:	1
Shank Size:	7/16
Shank Type:	3-Flat
Point Type:	SpeedPoint®
Cutting Edge Material:	HSS
Material:	HSS
Finish:	Bright
Applicable Materials:	Aluminum, Brass, Copper, Laminates, Plastic and Stainless Steel