Bridge Pin Hole Chamfer Tool

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Bridge Pin Hole Chamfer Tool

Item # 0459
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Bridge Pin Hole Chamfer Tool

A better way to countersink bridge pins! Here's a unique cutter we've designed to solve bridge countersinking problems.

It eliminates bit chatter, gives you precise, consistent control of the size and depth of cut, and keeps the bevel round, even on a curved bridge surface. You can use it with your hand drill, for cleaner, more professional results.

The Bridge Pin Hole Chamfer Tool gives you much better control than a standard countersink bit. The tool includes a steel pilot for new unreamed 3/16"-diameter bridge pin holes, and another for older bridges that have already been reamed. The pilot keeps the cutter spinning on center, eliminating chatter for a clean cut. An Allen-adjustable brass depth stop controls the cut of the tapered 4-fluted bit. Delrin® lining on the depth stop helps protect the surface of the bridge. When used in a hand drill, the depth stop keeps the cutter perpendicular to the bridge surface, so the countersunk bevel always remains round.

Our thanks to luthier Bryan Galloup for suggesting this great tool!

Instructions and Allen wrench included.

Trade Secrets!

Fixing a 1937 Martin bridge. The first step is fixing a sandwich!

Dan Erlewine's got an unusual bridge problem and an unusual repair.

Product Instructions

Bridge Pin Hole Chamfer Tool Instructions

Instructions for using the Bridge Pin Hole Chamfer Tool.

Customer Reviews

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  • 5.00 average rating from 11 reviews
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Good tool, works well

(Customer's Reviews)

I'm getting clean chamfers effortlessly (small cordless drill) Depth stop may polish the top of the bridge but does not damage it.
Would suggest fitting 10 x 16 x 0.3 mm shim washers behind brass/plastic stop against shoulder of cutter to give consistent diameters at top of chamfer (I use 2)
Useful if you disassemble to clean as it goes back to exactly the same setting.
Maybe too much to ask SM to provide shims?


Perfect Job!

(Customer's Reviews)

Another fine tool set is very useful and it does the job very well!


StewMac Chamfer Tool

(Customer's Reviews)

Once I learned how to best use this thing, it worked great. Using as recommended in an electric drill did not leave the pristine holes I wanted. But, using this tool in one of those old time hand crank drills, working very slowly, left crisp, clean, beautiful holes. Would not attempt a bridge pin hole without it now.

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Shown on page 30 of our latest catalog.