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HSS Cobalt Alloy Steel Step Drill Bit Set, 3-Piece, No. 1, No. 2 & No. 3

  • Mfr # 10502cb

  • Zoro # G1540061


product price:  $83.89
/ea

Key Features

Number of Pieces
3
Cutting Direction
Right Hand
Drill Bit Point Angle
135 Degrees
Drill Bit Material
Cobalt Steel
Includes
10231cb (1/8 in to 1/2 in), 10232cb (3/16 in to 1/2 in), 10233cb (1/4 in to 3/4 in)
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Specifications

Product Information

MFR #
10502cb
Zoro #
G1540061
UPC #
038548099255
Country of Origin
United States

Dimensions

Number of Hole Sizes
28
Bit Length
2-3/4", 3-1/8"
Sizes Included
1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"; 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"; 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
Step Thickness
5/32 in, 3/8 in
Drill Bit Sizes Included
1/8 in, 5/32 in, 3/16 in, 7/32 in, 1/4 in, 9/32 in, 5/16 in, 11/32 in, 3/8 in, 13/32 in, 7/16 in, 15/32 in, 1/2 in, 9/16 in, 5/8 in, 11/16 in, 3/4 in
Drill Bit Dimension Type
Fractional Inch
Size Range
1/8 in to 3/4 in
Shank Size
1/4 in, 3/8 in
Overall Length
2 1/2 in, 3 3/16 in, 3 1/4 in
Flute Length
1 1/2 in, 2 in, 2 3/16 in
Number Hole Sizes
17
Maximum Hole Size
3/4 in
Shank Diameter
1/4 in, 3/8 in
Largest Drill Bit Size
3/4 in
Shank Hex Size
1/4 in
Smallest Drill Bit Size
1/8 in
Minimum Hole Size
1/8 in
Shank Length
5/8 in, 3/4 in

Details

Item
Step Drill
Number of Pieces
3
Cutting Direction
Right Hand
Drill Bit Point Angle
135 Degrees
Drill Bit Material
Cobalt Steel
Includes
10231cb (1/8 in to 1/2 in), 10232cb (3/16 in to 1/2 in), 10233cb (1/4 in to 3/4 in)
Number of Flutes
1
Impact Rated
Not Impact Rated
Shank Shape
Three-Flat
Shank Type
Hex
Decimal Equivalent
0.125, 0.1563, 0.1875, 0.2188, 0.25, 0.2813, 0.3125, 0.3438, 0.375, 0.4063, 0.4375, 0.4688, 0.5, 0.5625, 0.625, 0.6875, 0.75
Primary Material Application
Aluminum, Brass, Copper, Wood, Plastic, Stainless Steel, Steel
Finish - Machining
Black Oxide
Material - Machining
Cobalt Alloy Steel
Measurement System
Fractional Inch
Shank Type - Machining
Straight with Three Flats
Drill Bit Case Type
Blister Pack
Number of Drill Bits
3
Sub Brand
Unibit
Drill Bit Point Type
Speed Point
Step Increments
1/32 in, 1/16 in

Description

The IRWIN 10502cb is a set of three step drill bits made from cobalt alloy steel, designed for use in drilling fractional-inch holes within the specified size range from 1/8 inch up to 3/4 inch. These bits feature a single flute and a speed point tip with a 135-degree point angle for use in drilling fractional-inch holes within the specified size range. The bits are intended for drilling in materials including aluminum, brass, copper, wood, plastic, stainless steel, and steel. Each bit has a hex-shaped shank with a three-flat straight design for compatibility with standard drill chucks.

Key Features:

  • Set includes three step drill bits covering 28 hole sizes ranging from 1/8 inch to 3/4 inch in the stated step increments of 1/32 inch and 1/16 inch.
  • Step thicknesses of 5/32 inch and 3/8 inch have step thicknesses of 5/32 inch and 3/8 inch for the specified drilling depth range.
  • Overall bit lengths range from 2 1/2 inches to 3 1/4 inches, with flute lengths between 1 1/2 inches and 2 3/16 inches.
  • Shank diameters available in 1/4 inch and 3/8 inch, with hex size of 1/4 inch for secure chuck engagement.
  • Black oxide finish for surface treatment.
  • Drill bit sizes included include step increments of 1/32 inch and 1/16 inch from 1/8 inch to 3/4 inch.
  • Packaged as a blister pack with each piece designed for fractional inch measurements.

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