Our drills are completely made by UnionTool's own equipment. For high quality products and stable
supply, we have
several inspection processes in our drill manufacturing system.
Within this content, you can see the manufacturing process of under cut drills (UC type) for an
example.
TRS strength test (Fig.1)
Removal of defective rod (Visual inspection)
Check sheet
Inspection sheet
Length of carbide chip (Fig.2)
Cut-off check sheet
Overall length (Fig.3)
Shank to body concentricity
Tensile strength
Assembly check sheet
Diameter
Undercut diameter
Shank diameter
Cylindricity
Shank to body concentricity
Blank check sheet
Diameter (1)
Undercut diameter (2)
Shank diameter (3)
Appearance
Blank inspection report
Web thickness
Body clearance
Margin width
Margin length
Helix angle
Point angle
Primary angle
Secondary angle
Overall length
Flute land ratio
Flute length
Body length
Chisel point inconcentricity
Web taper
Check sheet
No dust.
No cutting oil.
Cleaning solution check sheet
Flute length
Overall length
Margin width
Margin length
Chisel point inconcentricity
Body clearance
Web thickness
Helix angle
Point angle
Body length
Gap, Overlap
Primary flare, Primary taper
Chipping
Appearance
Inspection sheet
Inspection report
PRODUCT 01 PCB Drills / Routers / Ultra precision micro-hole drill
