Greenlee 52075246 #3 Cobalt St...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$194.46
$144.46
Greenlee 52075246 BIT,STEP #3 COBALT (34403C)

Greenlee 52075246 #3 Cobalt Step Drill Bit, 12-Step Stainless Steel Capacity

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Model: 52075246
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$194.46
$144.46
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Greenlee 52075246 #3 Cobalt Step Drill Bit, 12-Step Stainless Steel Capacity

The Greenlee 52075246 is a #3 cobalt step drill bit engineered for electricians and installers who need to enlarge and clean holes in sheet metal, panels, boxes, and enclosures without swapping bits mid-job. This step drill bit delivers a 12-step capacity and is rated to cut through material up to 10 Gauge (3.5mm) stainless steel, making it a go-to tool for demanding electrical and metalworking applications. Built with a minimum chuck size of 3/8" (9.5mm) and an overall length of 3.31", the 52075246 fits standard drill chucks used on the job site and in the shop while staying maneuverable in tight enclosures.

Key Features

  • 12-Step Capacity: a single bit covers 12 progressive hole sizes, reducing the need to change bits mid-job and speeding up panel and enclosure prep work.
  • Cobalt Construction: the #3 cobalt formulation is designed to hold an edge and resist heat buildup during repeated drilling into hard, abrasive materials.
  • Maximum Material Thickness: rated for up to 10 Gauge (3.5mm) stainless steel, giving installers confidence when working through heavier-gauge enclosures and boxes.
  • Minimum Chuck Size: fits a 3/8" (9.5mm) chuck, compatible with common corded and cordless drills used in electrical installation work.
  • Compact Overall Length: an overall length of 3.31" keeps the bit maneuverable in tight panels, junction boxes, and enclosures where clearance is limited.
  • Manufacturer Spec Sheet Available: a published spec sheet is available for this part number, giving contractors and engineers documented reference data for specification and procurement.

Technical Specifications

  • Capacity: 12 steps
  • Country Of Origin: US
  • Maximum Material Thickness: 10 Gauge (3.5mm) Stainless Steel
  • Minimum Chuck Size: 3/8" (9.5mm)
  • Overall Length: 3.31"
  • Product Type: Step Drill Bit

Typical Applications

  • Electrical Panel and Enclosure Fabrication
  • Junction Box and Conduit Body Modification
  • Sheet Metal and Stainless Steel Drilling
  • Commercial and Industrial Electrical Installation Work
  • Maintenance and Retrofit Projects Requiring Precise Hole Sizing

Why Greenlee?

Greenlee is a trusted name among electrical professionals, and the 52075246 #3 cobalt step drill bit reflects that reputation with a durable cobalt build rated for up to 10 Gauge stainless steel and a 12-step design that maximizes versatility from a single tool. The compact 3.31" overall length and 3/8" minimum chuck size make it easy to fit into standard drills already on hand, while the published manufacturer spec sheet gives contractors and engineers documented reference data for specification and procurement. For professionals who need dependable, consistent hole enlargement in panels, boxes, and stainless steel enclosures on every job, the Greenlee 52075246 delivers the performance and consistency electricians rely on.

Manufacturer Resources

Spec Sheet

Product Specs

Capacity:
12 steps
Country Of Origin:
United States
Maximum Material Thickness:
10 Gauge (3.5mm) Stainless Steel
Minimum Chuck Size:
3/8'' (9.5mm)
Overall Length:
3.31''
Product Height:
1.400 IN
Product Length:
7.000 IN
Product Type:
Step Drill Bit
Product Width:
3.650 IN
Volume:
35.769999999999996 CI
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Group:
Power Tools & Accessories

Greenlee 52075246 – Frequently Asked Questions

1) Will the Greenlee 52075246 step drill bit cut stainless steel enclosures?
Yes, within limits. The 52075246 is a #3 cobalt step bit rated for material up to 10 gauge (3.5mm) stainless steel. That covers most stainless junction boxes, panel doors, and sheet enclosures. Anything heavier than 10 gauge is past its rating and you want an annular cutter or a hole saw instead. Keep the speed low and the pressure steady, which is where the cobalt grade earns its keep on abrasive stainless.
2) Is this step bit short enough to work inside a wired panel or junction box?
Overall length is 3.31 inches, which is short enough to get a drill in behind a dead front or inside a junction box where you cannot back the drill off very far. Factor in your chuck and drill head depth when you measure clearance, since those add more than the bit does.
3) How many hole sizes does one Greenlee 52075246 bit cut?
Twelve. It is a 12-step bit, so a single bit walks through twelve progressive diameters, which is why electricians carry it for panel and enclosure prep instead of a full index of twist bits. Each step also acts as its own depth stop against thin sheet.
4) Can I use a step drill bit instead of a conduit knockout punch for panel openings?
For small and mid-size openings in sheet metal, yes, and that is the normal use for the 52075246 with its 12 progressive steps up to 10 gauge stainless capacity. Step bits also clean up and enlarge an existing hole, something a knockout punch cannot do once the hole is already there. For large trade sizes in a thick enclosure, a knockout punch still gives you a rounder, burr-free hole with less heat.
5) What exact part number should I order for the Greenlee #3 cobalt 12-step drill bit?
Greenlee 52075246, the #3 cobalt step bit. That is the manufacturer part number to put on the PO, and it ships as a single bit, not a set, so order one per step size range you need covered on the truck.
6) Is the Greenlee 52075246 step bit made in the USA?
Country of origin is listed as US, which matters if you are buying against a domestic-preference or Buy American requirement on a government or institutional job. A published manufacturer spec sheet exists for the part number for submittal packages.
How fast can I get the Greenlee 52075246 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 52075246 come with a warranty?
Absolutely. The Greenlee 52075246 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 52075246?
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 52075246 from ZenSupply?
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