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IRWIN Step Drill Bit: 1/4" to 3/4", TiN-Coated HSS - High-Speed Steel Step Drill Bits
IRWINHigh-Speed Steel Step Drill Bits

IRWIN Step Drill Bit: 1/4" to 3/4", TiN-Coated HSS

SKU 3G-OTH-208882

Brand
IRWIN
Item
Step Drill Bit: 1/4" to 3/4", TiN-Coated HSS
Category
High-Speed Steel Step Drill Bits
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Technical Specifications

IRWIN
Manufacturer Part Number
15103ZR
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IRWIN Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the IRWIN Step Drill Bit 15103ZR used for?

The IRWIN Step Drill Bit 15103ZR is used for drilling stepped holes in thin materials like sheet metal, plastic, and wood. Its TiN-coated HSS construction provides wear resistance and extends tool life. The 1/4" to 3/4" range suits electrical, plumbing, and HVAC applications where clean, burr-free holes are needed.

What are the specifications of the IRWIN Step Drill Bit 15103ZR?

The IRWIN Step Drill Bit 15103ZR has a 1/4" to 3/4" drilling range, is made of TiN-coated high-speed steel (HSS), and features a 3-flats shank for secure chuck grip. It is not impact rated. The manufacturer part number is 15103ZR. This bit is designed for general-purpose step drilling in thin materials.

Where to buy the IRWIN Step Drill Bit 15103ZR worldwide?

You can source the IRWIN Step Drill Bit 15103ZR 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 tools to procurement teams and maintenance professionals internationally.

How to select the right IRWIN step drill bit size?

Select the IRWIN step drill bit size based on the final hole diameter needed. The 15103ZR covers 1/4" to 3/4" in stepped increments. For larger holes, choose a bit with a wider range. Ensure the material thickness does not exceed the step depth. Always use cutting fluid for metal to prolong bit life and achieve clean cuts.

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 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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