Key Type JT0,0.4-4mm Drill Chuck with Micro Drill Adaptor - 1/2" Shank

Equip your lathe, milling machine, or pillar drill with the Micro Drill Adaptor and JT0 Chuck Combo Set. Designed specifically for high-precision, small-hole drilling, this set functions as a miniature sensitive quill attachment, giving you delicate fingertip control to prevent tiny drill bits from snapping.

How It Works

The 1/2" straight shank mounts directly into your tool holder, chuck, or collet. Inside the shank, a spring-return sliding spindle drives the included JT0 keyed 0.4–4mm drill chuck. A smooth-running, bearing-mounted knurled ring allows you to manually feed the drill bit with your fingers—giving you complete tactile feedback and precision control even while your machine spindle is rotating at high speed.

Key Features

• Complete Set: Includes both the Micro Drill Adaptor and a high-accuracy JT0 drill chuck (0.4–4mm range).
• Sensitive Fingertip Control: Knurled feed ring lets you feel the cutting pressure, virtually eliminating broken micro-drills.
• Small-Hole Precision on Large Machines: Effortlessly drill precision micro-holes on heavy-duty lathes, mills, or drill presses without risking damage to tiny bits.
• Spring-Return Action: Smooth internal spring automatically retracts the spindle once pressure is released.
• Standard 1/2" Straight Shank: Easily fits standard chucks, collets, and tool holders.