PCB micro drill 0,4 mm - 50pack

Economical package of 50 pcs 0,4mm PCB drill bits suitable for all standard PCBs made from FR4 base material.

Applications:

For drilling of small holes with high possitional accuracy and for drilling of small through holes and vias.

Advantages:

Excellent hole wall quality.
High positional accuracy.
Efficient chip removal.

Parameters:

Total lenght: 38mm
Spiral lenght: 5,5mm
Tip angle: 130º
Shaft diameter: 3,175mm

Recomended machining parameters:

Spindle speed: 120000RPM
Feed rate: 2,8m/min
Chip load: 23µm/rev
Retraction: 8m/min

*Recomended machining parameters provide guidelines which acts as starting points for optimising speeds and feeds at the user's end.