IRWIN Step Drill Bit: 7/8", Black Oxide HSS
IRWIN High-Speed Steel Step Drill Bits.
SKU 3G-OTH-208887
Also listed as: 10311 ZR · 10311-ZR
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
IRWIN High-Speed Steel Step Drill Bits.
Frequently Asked Questions
What is the IRWIN Step Drill Bit 10311ZR used for?
The IRWIN 10311ZR step drill bit is used for drilling clean, burr-free holes in thin materials like sheet metal, plastic, and drywall. Its 7/8" maximum diameter and black oxide HSS construction suit electrical, HVAC, and general fabrication work where multiple hole sizes are needed from one bit.
What are the specifications of the IRWIN Step Drill Bit 10311ZR?
The IRWIN 10311ZR is a high-speed steel step drill bit with a 7/8" maximum step diameter, black oxide finish, and a 3-flats shank to prevent slipping in the chuck. It is not impact rated, making it suitable for standard drilling applications in thin materials.
Where to buy the IRWIN Step Drill Bit 10311ZR worldwide?
3G Electric supplies the IRWIN 10311ZR step drill bit to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this high-speed steel bit.
How to select the right step drill bit for sheet metal?
For sheet metal, choose a step drill bit like the IRWIN 10311ZR with a black oxide HSS coating for heat resistance and a 3-flats shank for secure chuck grip. Match the maximum step diameter to your largest hole size. Avoid impact-rated bits unless your drill supports impact mode.
Used in
Common applications for IRWINIRWIN 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.
