sharpener for small drill bits (ø < 4mm)

thingiverse

The smaller the drill bit, the higher the level of frustration that arises when attempting to achieve perfect angles by hand, particularly when striving for a precise 120° shoulder and a cutting edge of more than 10°. With this device, even those with limited mechanical aptitude can master the task. Recommended components for assembly include: 1x M5 x 15mm hex-key screw 1x M5 wingnut 1x M3 x 15mm screw 2x M3 x 30mm screws 3x M3 nuts (to enhance grip) 2x M3 insert nuts (or standard M3 nuts) 2x 3ø x16mm bolts M3 screw tap (or M3 insert tap)