Union Tool's Drill Series
Micro Drill, Small Diameter Drill, General Diameter Drill for Electronic Printed Circuit Boards
It is ø3.175mm shank drill corresponding to a diversified drilling characteristic like packages, core materials, various rigid PWB (double sided and multilayered), and a high multilayered PWB, etc.
MD(micro Drill) series:
ø0.05-0.25mm (0.0020"-0.0098")
UC / UV(Small Diameter Drills) series: ø0.3-0.75mm (0.0118"-0.0295")
UC35/UM35 series: ø0.6-1.6mm (0.0236"-0.0630")
UM30 series: ø1.65-3.175mm (0.0650"-0.1250")
ST series: ø0.3-3.175mm (0.0118"-0.1250")
*The values inside the ( ) are in inch unit.
*Drill series for ø2mm shank drilling machine "K Series" are also in the various lineup.
Size: ø0.075-4.05mm (0.0030"-0.1594")
Slot Hole Drill
Drill of high rigid design, improves the slot hole accuracy.
SX24 Series: ø0.5-1.6mm (0.0197"-0.0630")


Drill for Flexible PWB
A drill designed to prevent the trouble that occurs in the drilling of flexible substrate.
FX Series: ø0.1-0.35mm (0.0039"-0.0138")
Drill for Automotive PWB
A drill designed especially to focus on the prevention of inner hole wall roughness in the drilling of the automotive PWB.
UA Series: ø0.3-1.6mm (0.0118"-0.0630")
Large Diameter Inverse Drill
An inverse diameter drill with larger size than shank diameter. It is designed with chip breaker that helps to prevent bird nesting and web-thinning that helps to reduce the thrust load on the spindle.
ID30C Series: ø3.2-6.5mm (0.1260"-0.2560")
Blind Hole Drill

A blind hole drill with taper tip. Used for part mounting and counter drilling.
BH Series: Various sizes
(Production by order)
