The 360° lathe adaptor kit allows the QC20 ballbar to perform 360°, 100 mm radius ballbar tests on a lathe. The arm assembly attaches to the lathe turret and the spindle bar attaches to the lathe spindle. Both arm and spindle bar include magnetic cups to locate the ballbar. Note: On lathes with restricted axis travel, it may be possible to perform a 50 mm radius test using the small circle accessory kit. It is crucial, however, to ensure that there is clearance for the ballbar in this configuration before performing the test