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Silver metal hex arbor with pilot drill bit attached

L.H. DOTTIE

L.H. DOTTIE V44 7/16'' Hex Arbor w/ Pilot Drill 1/2''-20 Thread Size pneumatic accessory

SKU CH-APHQ-W7MT0

A 7/16-inch hex arbor with pilot drill fits 1/2-inch-20 threads for pneumatic tools

  • 7/16'' hex arbor fits 1/2''-20 thread tools
  • pilot drill included for accurate hole starts
  • DOTTIE V44 model built for pneumatic accessory use
  • new condition ensures full factory performance
  • Proposition 65 notice covers cancer and reproductive risk

7/16'' Hex Arbor with Pilot Drill

This DOTTIE V44 accessory connects to a pneumatic or power tool using a 7/16-inch hex shank and a 1/2-20 thread. It includes an integrated pilot drill to start holes accurately in metal or wood. The item is new and intended for professional or DIY users who need a secure, quick-change arbor for hole-saw work.

Sustained drilling performance

The hardened pilot drill resists walking during extended cutting cycles, keeping the hole saw centred through thick material. Heat buildup is managed by the open arbor design, which allows chips to clear without binding. Continuous use at rated speeds maintains concentricity without the arbor loosening in the chuck.

Installation and common issues

Insert the hex shank into a compatible quick-change chuck and tighten the 1/2-20 thread onto the hole saw until seated. The most frequent problem is cross-threading the fine-pitch thread if the saw is forced; always start by hand. A worn pilot drill can be replaced, but the arbor itself is not serviceable if the hex flats strip.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 86% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDOTTIE

Questions about this item

Does the 1/2''-20 thread arbor generate noticeable vibration or heat during extended pneumatic use?

The arbor is a solid steel accessory with no moving parts of its own, so it adds no measurable vibration or heat beyond what the host pneumatic tool produces.

What drive tool must I already own to use the 7/16'' hex shank and 1/2''-20 thread?

You need a pneumatic or electric impact driver that accepts a 7/16'' hex shank and can mount a 1/2''-20 threaded hole saw or cutter.

Will the V44 arbor fit the older 1/2''-20 hole saws I already have in the workshop?

Yes, the 1/2''-20 thread matches the standard threading on legacy hole saws, so existing cutters screw on directly.

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