Brief introduction of Precision Miniature Ball Screw
Precision Miniature ball screw assemblies are conventionally understood to
be systems with a nominal diameter of 16mm or less. Their miniaturized nut
geometries are achieved through the use of optimized recirculation systems
with very small balls.These ball screws are usually not preloaded or only
slightly preloaded to ensure the smoothest possible travel. Miniature Ball
Screw is normally used in high precision equipments and apparatus.
We developed a special metal deflector to replace the plastic deflector.The
metal deﬂector can improve the serving life, stability and smoothness. If the
metal deﬂector is assembled together with the stainless steel screw shaft, nut
and ball, the miniature ball screw can be used in the environment of high-
temperature and corrosion.
Application of Miniature Ball Screw
◊ CNC machines: CNC machine centre, CNC turning machine, milling machine, EDM machines, grinding machine, wire
cut EDM machine, CNC boring machine.
◊ Industrial equipment: printing equipment, automation machinery, textile machine, drawing machine, injection
molding machine, paper processing equipment.
◊ Electronic machines: measuring robot, XY working table, medical equipment, SMT Equipment, semiconductor
equipment, other automation equipments.
◊ Transport machinery: material handling equipment, elevated actuator.
◊ Others: antenna leg actuator, valve operator etc.
Features of Miniature Ball Screws
● High mechanical eﬃciency
Miniature ball Screws are ﬁtted with steel Balls, providing rolling contact between the Nut and Screw Shaft,allowing for mechanical
eﬃciency of over 90% and reducing the required Torque to less than one-third that of conventional Lead Screws. The design of the
Ball Screws also allows linear motion to be converted into rotary motion easily (Fig. 1).
● Axial play
With conventional Triangular and Trapezoidal Screw threads, reducing the Axial play increases the rotational Torque due to the
sliding friction. Ball Screws, on the other hand, are very easily rotated, even without axial play.
● High precision
WY Ball Screws are machined, assembled, and inspected using the technology of ultra-precision shaft Screw and Screw
Gauge machining, under the temperature controlled room. High precision and accurate positioning ensure high reliability in use.
● Long service life
The Ball Screw movement results in virtually no wear, as the rolling-contact design, combined with the use of carefully selected
heat-treated materials, results in an extremely low friction. This is the reason that high precision can be kept over long period.