Bridge Pin Hole Chamfer Tool

  • 12 Reviews
  • Write a review

Bridge Pin Hole Chamfer Tool

Item # 0459
In stock, ready to ship!


Scroll to Top

Bridge Pin Hole Chamfer Tool

About This Item

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!

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

  • Excellent
  • Good
  • Average
  • Fair
  • Poor
Write a review
  • 4.92 average rating from 12 reviews
Sort by

Great tool for the job, but what about countersinking narrower 3 degree tapered pin holes?

(Customer's Reviews)

This countersink can make perfect chamfered holes when making a brand new bridge or countersinking already reamed 5 degree tampered pin holes, but the pilot bits wont fit in a narrower already reamed 3 degree tapered hole. The hole must be reamed to the wider 0.220" 5 degree taper pin size for the 7/32 pilot to work. So if you want to work on a Yamaha or any guitar that uses holes already reamed for 3 degree taper pins, this wont quite work. Has anyone else encountered this flaw, or is it just me???

Would be nice if a pilot bit machined for the smaller reamed 3 degree size (0.210 - 0.203 under skirt diameter) was included as well!


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!

Showing 3 of 12 Read more reviews >>

StewMac PDF Catalog, page 30 See Bridge Pin Hole Chamfer Tool
on page 30 of our StewMac Catalog PDF

12MB File

View with Adobe Acrobat Reader 4.0 or higher.
Download Adobe Acrobat free from Adobe.