Flute Spacing Error

UT tolerance （ø0.3mm）:　0.007mm or less

Flute spacing error

Hole Qualities

A:Poor registration accuracy

Unequal position of each cutting edge forms a rip height gap.
This imbalanced cutting quantity (resistance), worsens registration accuracy.

Countermeasure (Setting of drill point)

1.Use suitable drill well for drill specification and diameter.

List of drill well

V-type

2.Adjust the amount of drill protrusion from drill well.

*Ideal amount extending from the drill well is usually very small, however when re-pointing UC type drills, make sure that the entire head protrudes from the drill well.
(As it the margin part maybe chipped, avoid using this part to rest the drill in the drill well.)

3.Adjust the universal joint (Correcting runout)