Milwaukee 48-89-9205 #5 Step Drill Bit, 1/4" - 1-3/8" by 1/8" Step Increments
The Milwaukee 48-89-9205 #5 Step Drill Bit is engineered to bore clean, precise round holes across a wide range of diameters using a single tool. This step bit covers a cutting range of 1/4" up to 1-3/8", advancing in graduated 1/8" increments so technicians can move from one hole size to the next without swapping tools mid-job. The stepped design is well suited for enlarging knockouts and punching holes in electrical enclosures, panels, junction boxes, and sheet metal where multiple hole diameters are required on the same workpiece. As Model #5 in the Milwaukee step bit lineup, this bit is built to deliver repeatable, accurate results for electricians, HVAC technicians, and metal fabricators working in the field or shop.
Key Features
- Step Range: Cuts a full range of hole sizes from 1/4" up to 1-3/8" with a single bit, reducing the number of individual drill bits needed on the job.
- 1/8" Step Increments: Graduated steps advance in 1/8" increments, giving installers precise, incremental control over final hole diameter as they drill.
- #5 Step Bit Configuration: Milwaukee's Model #5 step pattern is sized to cover common electrical, mechanical, and sheet metal hole-sizing requirements in one tool.
- Single-Tool Versatility: One step bit replaces an entire set of twist bits or hole saws when a job calls for multiple hole diameters on the same material.
- Milwaukee 48-89-9205: Identified by Milwaukee part number 48-89-9205 for straightforward reordering, inventory tracking, and cross-referencing.
- Stepped Cutting Edge: The progressive step geometry helps center the bit and start clean holes without walking, even on thin-gauge material.
Technical Specifications
- Refer to manufacturer documentation for complete specifications.
Typical Applications
- Electrical Panel and Enclosure Knockout Enlargement
- Junction Box and Conduit Hole Sizing
- Sheet Metal Fabrication and Ductwork
- HVAC Installation and Service Work
- General Maintenance, Repair, and Fabrication Drilling
Why Milwaukee?
Milwaukee designs its step drill bits, including the 48-89-9205 #5, to hold up to repeated use on demanding commercial and residential jobsites where clean, accurately sized holes matter. The graduated 1/8" step pattern spanning 1/4" to 1-3/8" gives electricians, HVAC technicians, and metal fabricators the flexibility to handle a wide range of hole sizes with one dependable tool instead of carrying a full set of individual bits. Choose the Milwaukee 48-89-9205 for consistent, repeatable performance backed by a trusted name in professional tooling.
Manufacturer Resources
Product Specs
- Department:
- Electrical
- Product Subgroup:
- Drill & Driver Bits
- Product Type:
- Step Drill Bit
- Country Of Origin:
- United States
- Bit Type:
- Step
- Product Group:
- Power Tools & Accessories
Milwaukee 48-89-9201 – Frequently Asked Questions
1) What is a Milwaukee step drill bit used for on electrical work?
A step drill bit cuts clean round holes at several diameters with one tool, which is why electricians reach for it to enlarge knockouts in panels and enclosures, size holes in junction boxes for conduit fittings, and punch thin-gauge sheet metal. The stepped cutting edge helps the bit center and start without walking on thin material, so you are not chasing a wandering twist bit across a cabinet face. On a job that needs three or four different hole sizes in the same enclosure, it replaces a stack of twist bits or hole saws.
2) Which Milwaukee step bit part numbers can I order for panel and knockout work?
Four Milwaukee step bit part numbers are offered: 48-89-9201, 48-89-9204, 48-89-9205 and 48-89-9212. Order by that Milwaukee number rather than by description, since each number corresponds to a different step pattern and the numbers are what you will want on a reorder or in your inventory system.
3) Step bit or hole saw for cutting holes in an electrical enclosure?
For sheet steel enclosures, panels and junction boxes, the step bit is the simpler choice: one bit covers multiple diameters, it self-centers as the steps engage, and there is no pilot drill or arbor to set up. A hole saw earns its place when you need a single large diameter beyond what the step pattern reaches, or when you are cutting thicker stock or wood. On thin-gauge metal where several different hole sizes are needed on the same piece, the step bit does the whole job without a tool change.
4) I only ever drill one hole size, 5/8 inch. Do I need a step bit?
Not necessarily. A Milwaukee step bit such as the 48-89-9212 earns its place when one workpiece needs several hole diameters, since the graduated step pattern lets you move from one size to the next without swapping tools. For repeat work at a single 5/8 inch diameter, a fixed-size bit like the Lenox 12111-10DGHS, a D/S-10Dg series diamond grit bit at 5/8 inch, cuts that one size directly. Note the Lenox uses a diamond grit cutting surface, so match it to the material you are drilling rather than assuming it behaves like the step bit in thin-gauge metal.
5) Are Milwaukee 48-89 series step drill bits made in the USA?
Country of origin on the Milwaukee 48-89 step bits is the United States. That matters if you are buying against a procurement requirement for domestic-origin tooling on a government, healthcare or education contract, so it is worth noting on the PO.
6) How is a diamond grit drill bit different from a Milwaukee step bit?
Different materials entirely. The Milwaukee 48-89 bits are step bits, meant for metal and sheet goods where you want a range of hole diameters from one tool. A diamond grit bit such as the Lenox 12111-10DGHS, a 5/8 inch D/S-10Dg, grinds rather than cuts and is the tool for hard, abrasive material. If you are drilling enclosures and duct, go with the step bit; a diamond grit bit is not a substitute for it.
7) What is the difference between the Milwaukee 48-89-9205 and 48-89-9212 step bits?
They are different sizes within the same Milwaukee step bit family. The 48-89-9205 is the 5-1/4 inch size and the 48-89-9212 is the 12-7/8 inch size; both are step bits with the graduated stepped cutting edge used for knockout enlargement, junction box and conduit hole sizing, and sheet metal work. Order by the Milwaukee part number so the step pattern and overall size match the hole range you need.
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Does the Milwaukee 48-89-9201 come with a warranty?
Absolutely. The Milwaukee 48-89-9201 is backed by a manufacturer’s warranty.
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