Lead Accuracy

Nomenclature of
 PMI Ballscrew

PMI Precision
 Ground Ballscrew


Internal Ball Series
End Deflector Series
External Ball Series
High Lead Series
Heavy Load Series
Heavy Load Series of    End Deflector
End Cap Series
Miniature Series
Standard Type Series
PMI Rolled
Ballscrews
PMI Ballscrews of Blank Shaft End
PMI Ballscrew
 With Hollow
 Cooling System
Ballscrew
 FA Series


High reliability
PMI has accumulated many years experience in production managing. It covers the whole production sequence, from receiving the order, designing, material preparation, machining, heat treating, grinding, assembling, inspection, packaging and delivery. The systemized managing ensures high reliability of PMI Ballscrews.  
 
High accuracy
PMI Ballscrews are machined, ground, assembled and Q.C. inspected under the constant temperature control (20℃) to ensure high precision of Ballscrews. accuracy inspection certifi cate.
 
 
Long durability
PMI Ballscrews are made of German Alloy steels, which are well quenching and
tempering treated for good rigidity, along with suitable surface hardening to ensure long durability.
 
 
High working
efficiency
Balls are rotating inside the Ballscrew nut to offer high working efficiency.
Comparing with the traditional ACME screws, which work by friction sliding between the nut and screw, the Ballscrews needs only 1/3 of driving torque.
It is easy to transmit linear motion into rotation motion.
 
 
No backlash and with high rigidity
The Gothic profile is applied by PMI Ballscrews. It offers best contact between
balls and the grooves. If suitable preload is exerted on Ballscrew hence to eliminate clearance between the ball nut and screw and to reduce elastic deformation, the ballscrew shall get much better rigidity and accuracy.