Drill sharpening jig for bench grinders with stop to produce four facet drill for drills up to 12mmAllows you to accurately sharpen a drill bit to 118 deg with lips of equal length using the stop
Set your tool rest to 10 deg for primary clearance
Free hand the second clearance around 25 deg
Requires a 6mm hole drilled into tool rest
Can be used free hand
or
Use a keyless chuck (not supplied) slightly modified
Drill chuck out to 12mm
Mark each end in 90 deg intervals
Line drill lips up with 0 and 180 deg marks
use 90 and 270 deg marks when sharpening as reference to make sure drill lips are parallel to grinding wheel
Hope that makes sense