HHSS

Step drill for tuner holes

$32.19

Our high-speed steel step drill works great when installing any classical tuning machine with a 10mm (3/8") barrel. For quick and correct fitting of classical guitar tuning machines, the holes that accept the string rollers should be slightly relieved where the roller passes through the outside rib of the guitar head. These custom-made step drills drill relieved holes in one operation, increase the accuracy of hole placement, and clear chips quickly. 

27/64" (.421") outer diameter, .402" diameter x 15/16" long step. 1/2" overall length.

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Product Description

FEATURES:

  • Short length, high-speed steel
  • Brad-point style with long spurs (These are very sharp and protected with hot dip plastic)
  • Black oxide finish

NOTE: This special step drill is intended for drill press use only. It is not intended for use with either the Classical Tuner Drill Jig or the Headstock Slotting and Drilling Jig – It will damage these jigs.

Details

Shipping Restrictions - Location
No Restrictions
Tool Type or Function
Drilling or Reaming
Bit Size
402"/421" (13/32+")

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Step drill for tuner holes

Our high-speed steel step drill works great when installing any classical tuning machine with a 10mm (3/8") barrel. For quick and correct fitting of classical guitar tuning machines, the holes that accept the string rollers should be slightly relieved where the roller passes through the outside rib of the guitar head. These custom-made step drills drill relieved holes in one operation, increase the accuracy of hole placement, and clear chips quickly. 

27/64" (.421") outer diameter, .402" diameter x 15/16" long step. 1/2" overall length.

Write your review