The rapidly growing use of servo and stepping motor drives for a wide range of linear motion
requirements has produced a demand for an ever growing variety of lead and actuator screws.
Kinefac has responded by expanding its capability in diameter, lead, number of starts, and thread
form.  These advances are the result of unique five-axis die grinding capability supported by our
unique lead screw application engineering know how. 

The above illustrates the range of tooth forms, lead angle, number of leads and size currently
being produced with Kine-Form® dies, Kinefac tooling and Kine-Roller® rolling machines. 

For the medical and instrumentation industries our users are currently producing multi-part
actuator screws as small as one millimeter.  At the other end of the scale heavy machinery
manufacturers are using screws up to 50 mm with 4 mm pitch. In the middle range millions of
seat adjuster lead screws are being produced on our MC-10 High Speed Kine-Rollerâ.  

Depending on the application, Kinefac can provide flank angles as low as 12 degrees up to 45
degrees.  Where the loads are uni- directional, nonsymmetrical thread forms can be
provided. Lead accuracy is a function of lead angle, form depth to diameter ratio, blank material
control and blank diameter precision.  For small diameter single start lead screws in the 300
series of stainless steel a lead tolerance of +/- 10 microns per 25 mm of length is readily
attainable.  

Production rates vary widely depending on machine size and lead requirements.  Currently seat
adjuster actuator screws are being produced at 3.5 meters per minute.  

Kinefac can provide its users with lead screw design support, as well as extensive background in
lead screw and actuator's performance parameters.  In addition, it is not uncommon for Kinefac to
use the production dies to roll injection mold pins for the mating nut.  

Finally, the Kinefac TD-21 Kine-Turnâ Center Drive Lathe is used extensively for the production of
lead screw and actuator blanks.