Milwaukee 48-89-2735 THUNDERBO...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.79
Milwaukee 48-89-2735 THUNDERBOLT Black Oxide Twist Drill Bit

Milwaukee 48-89-2735 THUNDERBOLT Black Oxide Twist Drill Bit

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Model: 48-89-2718

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

$1.79
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Milwaukee 48-89-2735 29/64" THUNDERBOLT Black Oxide Twist Drill Bit

The Milwaukee 48-89-2735 29/64" THUNDERBOLT Black Oxide Twist Drill Bit is a precision-engineered drilling accessory built for professionals and serious DIYers who need consistent, reliable performance on the jobsite. Part of Milwaukee's THUNDERBOLT line, this twist drill bit features a 29/64" diameter paired with a black oxide finish engineered to stand up to repeated use across a wide range of drilling applications. The twist-flute design is intended to channel material away from the cutting edge as the bit advances, helping maintain a clean, accurate hole with less binding. Whether you're boring through metal, wood, or plastic, this bit is designed to deliver the accuracy, control, and durability that tradespeople expect from the Milwaukee name. Its 29/64" sizing makes it a practical addition to any drill bit set or index for shops and jobsites that need a dependable bit on hand for common drilling tasks.

Key Features

  • Trade Size: Precision-ground 29/64" diameter provides consistent, repeatable hole sizing for applications that call for this exact bit size.
  • Durable Construction: The black oxide finish is designed to help resist corrosion and reduce friction during drilling, which can extend the working life of the bit under heavy, repeated use.
  • Twist Bit Design: Standard twist-drill geometry promotes efficient chip evacuation and smoother cutting action, helping keep the bit running cooler and cutting cleaner through the material.
  • THUNDERBOLT Series: Engineered as part of Milwaukee's THUNDERBOLT drill bit lineup, this bit is built to meet the demands of professional-grade drilling applications on the jobsite.
  • Versatile Sizing: The 29/64" diameter fits neatly into a standard drill bit set, giving contractors and DIYers a reliable option for jobs that call for this specific hole size.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

The Milwaukee 48-89-2735 THUNDERBOLT Black Oxide Twist Drill Bit is well suited to a variety of drilling tasks across trades and job types, including:

  • General-Purpose Drilling: A reliable choice for everyday drilling tasks on the jobsite or in the shop.
  • Metalworking and Fabrication: Suited to drilling into metal stock as part of fabrication or repair work.
  • Woodworking Projects: Useful for boring clean holes in wood for construction, framing, or furniture work.
  • Plastic and Composite Materials: Can be used to drill through plastics and composite materials commonly found on the jobsite.
  • Professional and DIY Tool Kits: A practical addition to a drill bit index or tool bag for tradespeople and home users alike.

Why Milwaukee?

Milwaukee builds its THUNDERBOLT drill bits with an emphasis on durability and consistent, dependable performance, backed by a black oxide finish engineered for long-lasting use in demanding conditions. The 48-89-2735 pairs a precision 29/64" diameter with twist-drill geometry to help deliver clean, accurate holes drilling after drilling. For professionals and serious DIYers who need a drill bit they can count on for repeat use, the Milwaukee THUNDERBOLT 29/64" Black Oxide Twist Drill Bit reflects the quality and reliability that has made Milwaukee a trusted name in the trades.

Manufacturer Resources

Product Specs

Product Type:
Twist Drill Bit
Product Finish:
Black Oxide
Series:
THUNDERBOLT
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
list_batch:
MWK-20260918
Product Group:
Power Tools & Accessories
Product Length:
6 in

Milwaukee 48-89-2718 – Frequently Asked Questions

1) Which Milwaukee bit do I use to drill a tap hole for 1/2-13 threads?
The 29/64 inch THUNDERBOLT bit, Milwaukee 48-89-2735, is the standard tap drill size for 1/2-13 UNC. If you are drilling a clearance hole for a 1/2 inch bolt instead of tapping, step up to the 31/64 inch (48-89-2737) or 15/32 inch (48-89-2736) bit.
2) Can a Lenox 12111-10DGHS diamond grit drill bit be used in place of a Milwaukee THUNDERBOLT black oxide twist bit?
No, they are different cutting tools for different materials. The Milwaukee 48-89-2735 is a black oxide twist drill bit with standard twist-flute geometry, intended for general-purpose drilling in metal, wood, and plastic. The Lenox 12111-10DGHS is a 5/8-inch diamond grit drill bit from the D/S-10Dg series, which abrades hard material rather than cutting chips with a fluted edge. If the hole is in steel stock, wood framing, or plastic, the THUNDERBOLT twist bit is the matching tool; a diamond grit bit is the tool reached for when the material is too hard for a conventional twist bit.
3) Will a black oxide twist bit drill steel, or do I need cobalt?
Black oxide is the finish on these THUNDERBOLT bits, and it suits general drilling in mild steel, wood and plastics, which is what the bits are described for. For sustained work in hardened or abrasive stock you want a more aggressive bit; for example ZenSupply carries the Lenox D/S-10Dg diamond grit bit, 12111-10DGHS in 5/8 inch, for materials a standard twist bit struggles with.
4) I need a 5/8-inch hole and the largest THUNDERBOLT black oxide bit I see is 31/64-inch. What are my options?
The Milwaukee THUNDERBOLT black oxide twist drill bits run from 5/64-inch up through 31/64-inch in the fractional steps covered by part numbers 48-89-2711 through 48-89-2737, so none of them will produce a 5/8-inch hole. For a 5/8-inch hole in hard material, the Lenox 12111-10DGHS is a 5/8-inch diamond grit drill bit in the D/S-10Dg series. Confirm the material first: diamond grit is an abrasive cutter, so match it to the substrate rather than treating it as a larger version of a twist bit.
5) Are these sold as single bits or as a set?
Each size is its own orderable item with its own Milwaukee part number, so you buy the individual bit you need rather than a full index. That is how shops top up a drill index after breaking one size, for instance replacing just the 1/4 inch (48-89-2722) without rebuying a kit.
6) Is a black oxide bit a good choice for electrical work drilling through metal studs and panel enclosures?
It is a reasonable general-purpose pick for that work. These THUNDERBOLT bits are catalogued for electrical trade use and are intended for metal, wood and plastic, and the sizes offered cover common knockout pilot and fastener holes from 5/64 up to 31/64 inch.
7) Why does the black oxide coating matter on a drill bit?
The coating on these THUNDERBOLT bits is there to resist corrosion and cut friction while drilling, which helps the bit run cooler on repeat holes. It is a surface treatment, not a substitute for a harder substrate, so keep speeds down and use cutting oil in steel.
How fast can I get the Milwaukee 48-89-2718 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 Milwaukee 48-89-2718 come with a warranty?
Absolutely. The Milwaukee 48-89-2718 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 Milwaukee 48-89-2718?
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 Milwaukee 48-89-2718 from ZenSupply?
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