The T. I. R (Total Indicator Run-out), the test-bar diameter, measuring position and measuring frequency must be decided by the requests of the electric tool manufacturers, air tool manufacturers and tool manufacturers.

When chucking the cutting tools on our Drill Chuck, use the exclusive chuck key and tighten at three key holes equally to get the enough gripping torque. And Yukiwa Drill Chucks are manufactured conforming to JIS and the qualities of composing parts are controlled closely. Therefore, our Drill Chucks can hold the cutting tool stably.

There are two kinds of outer sleeve in the material, plastic sleeve and metal sleeve. The plastic sleeve is used to lighten the weight. The metal sleeve appears to be thick, heavy and high-grade. And also there are the single sleeve keyless drill chucks and two-separate-sleeve keyless drill chucks. The single sleeve keyless drill chucks are used on the drills/drivers having spindle locking mechanism.

The proper heat-treatment is done on three jaws of the Multi Keyless Drill Chuck. By the shapes of the jaws, the stable run-out accuracy and the strong gripping torque are achieved. The keyless drill chucks with carbide-tip jaws are also available. They have three times stronger gripping torque than those of our conventional drill chucks. Carbide Jaw Bite reduces bit slippage and enhances wear resistance.

Multi Keyless Drill Chucks with Locking mechanism can easily do chucking operations on the hammer drills or the impact drills/drivers. Our unique locking mechanism has been patented. After the opening-closing endurance test in several thousand times, the initial gripping torque has been maintained.