Through the effort of brainpower of research center of component of function of scroll of limited company of Hanjiang machine tool, be labelled this enterprise 2006 year one of 17 keys tasks burden ball guide screw deputy development is successful recently, first trial-produce product is checked and accept smoothly already through the user and case shipment. The 4200 × of × of GR100 × 60/2 that develop a success this guide screw of 4650 burden ball deputy, be in at present guide screw of ball of domestic double head deputy in, it has 4 the biggest: Namely diameter the biggest, lead the biggest, pitch ball bearing diameter is the the biggest, biggest (15. 081mm) . Of this task finished the development that accelerates industry of scroll function component for Chinese aircraft company to accumulate experience. CNC Milling