Kerk Lead Screw Assemblies have a modified acme thread shape that has been optimized for higher efficiency and precision in linear movements. They are available with a diameter of 2mm to 24mm, with many different options in terms of pitch and type of nut. Church spindles do not require lubrication as they use self-lubricating plastics. Further advantages are: quiet operation, low cost price for series, customized final finish according to the customer's drawing.