Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
IRWIN 10239cb Cobalt Step Drill Bit, 7/8" to 1-1/8", Black Oxide, 3-Flats Shank - Cobalt Step Drill Bits
IRWINCobalt Step Drill Bits

IRWIN 10239cb Cobalt Step Drill Bit, 7/8" to 1-1/8", Black Oxide, 3-Flats Shank

IRWIN Cobalt Step Drill Bits.

SKU 3G-OTH-213690

Also listed as: 10239 cb · 10239-cb

Brand
IRWIN
Item
10239cb Cobalt Step Drill Bit, 7/8" to 1-1/8", Black Oxide, 3-Flats Shank
Part Number
10239cb
Category
Cobalt Step Drill Bits
Available to Order
Also known as:10239cbIRWIN
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

IRWIN
Manufacturer Part Number
10239cb

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

IRWIN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

IRWIN Cobalt Step Drill Bits.

Frequently Asked Questions

What is the IRWIN 10239cb step drill bit used for?

The IRWIN 10239cb step drill bit is used for drilling stepped holes in thin materials like sheet metal, plastic, and wood. Its black oxide cobalt construction provides heat resistance and durability for repeated use in industrial maintenance, fabrication, and electrical panel work.

What are the specifications of the IRWIN 10239cb step drill bit?

The IRWIN 10239cb step drill bit has a size range of 7/8" to 1-1/8", is made of black oxide cobalt, and features a 3-flats shank to prevent slipping in the chuck. It is not impact rated, so use only in standard drill chucks.

Where to buy the IRWIN 10239cb step drill bit worldwide?

3G Electric supplies the IRWIN 10239cb step drill bit worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this cobalt step drill bit to your facility, ensuring you get the right tool for your application.

How to select the correct IRWIN step drill bit size?

To select the correct IRWIN step drill bit, match the required hole diameter to the bit's step range—here 7/8" to 1-1/8". Ensure the material is suitable for cobalt bits (e.g., stainless steel or hardened metals) and that your drill is not impact-rated, as this bit is not impact rated.

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
Not sure this is the right part? Photo-identify it

IRWIN Products

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

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from IRWIN

View all IRWIN parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first