Greenlee 52075247 Cobalt 3-Ste...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$251.73
$201.73
Greenlee 52075247 BIT,STEP #8 COBALT (30008C)

Greenlee 52075247 Cobalt 3-Step #8 Drill Bit, Stainless Capable

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Model: 52075247
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$251.73
$201.73
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Greenlee 52075247 Cobalt 3-Step #8 Drill Bit

The Greenlee 52075247 Cobalt Step Drill Bit, 3-Step #8 (manufacturer designation 30008C) is a professional-grade cobalt step drill built for cutting clean, precise holes through electrical enclosures, panels, and sheet metal. This #8 step bit is engineered with 3 steps and cuts hole sizes of 1/2", 7/8", and 1-1/8" (12.7mm, 22.2mm, and 28.6mm), giving electricians and installers three common conduit knockout sizes from a single tool. Rated for material up to 10 Gauge (3.5mm) stainless steel, this bit is built to stand up to the toughest jobsite cutting tasks while maintaining accuracy hole after hole. Compact and versatile, it is designed for electricians, panel builders, and metalworking contractors who need dependable progressive hole-cutting performance without swapping tools mid-job.

Key Features

  • 3-Step Capacity: Cuts 3 distinct hole sizes from one bit, reducing the number of tools needed on the job.
  • Hole Sizes: Produces 1/2", 7/8", and 1-1/8" holes (12.7mm, 22.2mm, 28.6mm), matching common electrical conduit and connector knockout diameters.
  • Durable Construction: Cobalt material construction provides added heat resistance and durability for cutting through tough materials.
  • Maximum Material Thickness: Rated for up to 10 Gauge (3.5mm) stainless steel, suitable for demanding metal-cutting applications.
  • Minimum Chuck Size: Compatible with drills using a 3/8" (9.5mm) chuck, fitting standard cordless and corded drill drivers.
  • Compact Overall Length: Measures 3.44" in overall length for maneuverability in tight enclosures and panel cutouts.
  • Product Type: Step Drill Bit, purpose-built for progressive hole enlargement in sheet metal and electrical boxes.

Technical Specifications

  • Capacity: 3 steps
  • Country Of Origin: US
  • Hole Size: Inches: 1/2, 7/8, 1-1/8 Millimeters: 12.7, 22.2, 28.6
  • Maximum Material Thickness: 10 Gauge (3.5mm) Stainless Steel
  • Minimum Chuck Size: 3/8'' (9.5mm)
  • Overall Length: 3.44''
  • Product Height: 1.4 IN
  • Product Length: 7 IN
  • Product Width: 3.6 IN
  • Packaged Weight: 0.325 lbs

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Conduit Knockout Hole Cutting
  • Sheet Metal and Stainless Steel Drilling
  • HVAC and Electrical Box Installation
  • General Electrical and Metalworking Contractor Use

Why Greenlee?

Greenlee cobalt step drill bits are built with durable cobalt construction rated to cut through material as thick as 10 Gauge (3.5mm) stainless steel, giving electrical professionals a dependable tool for accurate, repeatable hole cutting. With a compact 3.44" overall length and compatibility with drills using a 3/8" (9.5mm) chuck, the Greenlee 52075247 delivers reliable performance for demanding jobsite cutting tasks, backed by Greenlee's reputation for durable, professional-grade electrical tools built in the United States.

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Manufacturer Resources

Spec Sheet

Product Specs

Capacity:
3 steps
Country Of Origin:
United States
Hole Size:
Inches: 1/2, 7/8, 1-1/8 Millimeters: 12.7, 22.2, 28.6
Maximum Material Thickness:
10 Gauge (3.5mm) Stainless Steel
Minimum Chuck Size:
3/8'' (9.5mm)
Overall Length:
3.44''
Packaged Weight:
0.325
Product Height:
1.4 IN
Product Length:
7 IN
Product Type:
Step Drill Bit
Product Width:
3.6 IN
Volume:
35.279999999999994 CI
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Group:
Power Tools & Accessories

Greenlee 52075247 – Frequently Asked Questions

1) What hole sizes does the Greenlee 52075247 step bit cut?
The 52075247 is a 3-step #8 bit cutting 1/2 inch, 7/8 inch and 1-1/8 inch (12.7, 22.2 and 28.6 mm). Those three are the conduit knockout diameters for 1/2 inch, 3/4 inch and 1 inch trade size conduit connectors, so one bit covers the three most common panel punches without changing tools.
2) Will this Greenlee cobalt step bit cut stainless steel enclosures?
Yes. The 52075247 is cobalt and rated for material up to 10 gauge (3.5 mm) stainless steel, so stainless panels, washdown enclosures and marine boxes are within its range. Thicker than 10 gauge stainless is past the rating, and you'd move to a hole saw or knockout punch for that.
3) Is this step bit short enough to use inside a wired panel?
Overall length is 3.44 inches, so the bit plus chuck stays compact enough to work inside enclosures and tight panel cutouts where a long twist bit or hole saw arbor would not clear the gear.
4) What is the Greenlee manufacturer number for the #8 cobalt step bit?
It is ordered as Greenlee 52075247, with the manufacturer designation 30008C printed on the tool and packaging. Both refer to the same 3-step #8 cobalt bit.
5) Where is the Greenlee 52075247 step bit made?
Country of origin is the US, which matters on public and federally funded work where domestic sourcing is part of the procurement spec.
How fast can I get the Greenlee 52075247 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Greenlee 52075247 come with a warranty?
Absolutely. The Greenlee 52075247 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Greenlee 52075247?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Greenlee 52075247 from ZenSupply?
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