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IRWIN Step Drill Bit: 13/16" to 1-3/8", Black Oxide HSS - Flat-Bottom High-Speed Steel Step Drill Bits
IRWINFlat-Bottom High-Speed Steel Step Drill Bits

IRWIN Step Drill Bit: 13/16" to 1-3/8", Black Oxide HSS

SKU 3G-OTH-198902

Brand
IRWIN
Item
Step Drill Bit: 13/16" to 1-3/8", Black Oxide HSS
Category
Flat-Bottom High-Speed Steel Step Drill Bits
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Technical Specifications

IRWIN
Manufacturer Part Number
10221
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IRWIN Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the IRWIN Step Drill Bit 10221 used for?

The IRWIN Step Drill Bit 10221 is used for drilling stepped holes in thin materials like sheet metal, plastic, and wood. Its flat-bottom design creates clean, burr-free holes for applications such as electrical enclosures, automotive panels, and HVAC ductwork. The black oxide coating reduces friction and extends bit life.

What are the specifications of the IRWIN Step Drill Bit 10221?

The IRWIN Step Drill Bit 10221 has a size range from 13/16" to 1-3/8", is made of high-speed steel with a black oxide finish, and features a 3-flats shank to prevent slipping in the chuck. It is not impact rated. The manufacturer part number is 10221.

Where to buy the IRWIN Step Drill Bit 10221 worldwide?

You can source the IRWIN Step Drill Bit 10221 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine IRWIN products to procurement teams and engineers globally.

How to select the right IRWIN step drill bit size?

To select the right IRWIN step drill bit, match the hole diameter range to your application. The 10221 covers 13/16" to 1-3/8" in stepped increments. For thinner materials, use a slower speed and light pressure. Always ensure the shank fits your drill chuck; the 3-flats design provides secure grip without slipping.

Used in

Common applications for IRWIN
Wood framing and decking — IRWIN ship auger bits (e.g., SKU 4AAT6) for deep drilling in timber
Electrical and plumbing installations — IRWIN hybrid utility bits (e.g., SKU 5ELR0) for drilling through wood and thin metal
Automotive assembly and repair — IRWIN power socket adapters (e.g., SKU 55EW60) for driving sockets with impact tools
General construction fastening — IRWIN impact Torx bits (e.g., SKU 787P77) for driving screws in metal and wood
Cabinet making and furniture assembly — IRWIN power bits (e.g., SKU 55EW15) for Phillips head screws in particle board and hardwood
Maintenance and repair tasks — IRWIN insert bits (e.g., SKU 55EW26) for quick bit changes in cordless screwdrivers

IRWIN Products

3G Electric supplies IRWIN flat-bottom high-speed steel step drill bits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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