FIRSTCUT holder's feed screw is polished at high precision and thus moves smoothly, allowing for accurate dimensional adjustment with the dial scale (backlash-free). Showa's special design includes a slide lock-bolt, a backlash adjustment bolt, a feed screw that is fixed with high-quality ball bearings, and double screws that create a robust and strong structure with no gaps. Please notice that different machining diameters have different holder geometric dimensions and may have some specific features such as oil holes. 

For geometric dimensions of FIRSTCUT chucks, see main catalog <here>.

DIAL DESIGN WITH AUXILIARY RING: The dial is very easy to read because the gear is incorporated to widen the calibration pitch. In addition, its structure eliminates backlash, thereby improving its operability. An auxiliary ring is placed on the outer circumference of the dial. Rotating this manually makes dimensional adjustment easier and eliminates reading errors.

REINFORCED CUTTING STABILITY: The holder's body is equipped with a polished guide groove to keep the blade fixed, thus absorbing the component force and improving machining stability. 

HIGH PRECISION FEED: the feed screw has been polished with high precision after heat treatment in order to maintain a highly accurate feed, allowing the user to reliably correct dimensions on the machine.

THROUGH COOLANT SUPPORT: Make use of all the advantages of  using Through-Coolant: improved tool lifespan, reach higher feeds and speeds safely, and improved dimensional accuracy and finishing quality on your workpieces.