Trapezoidal Screw which is some times more commonly known as lead screw has a 30 degree contact angle. This product is different to Acme screw which has a different contact angle and is not compatible with trapezoidal screw.
This product is known under a few different names. For example: Lead Screw, Acme and Trapezoidal screws. Essentially these are all the same apart from some variation between the gear angle, pitch and lead dimensions. These products are generally a square cut type of thread employing a simple plain nut to provide the linear motion. These are suitable for a variety of applications where they may be ideal as a substitute for drive belts, hydraulic and pneumatic cylinders.
In Australia our stock consists of Trapezoidal screw, not Acme screw. Statewide Linear Bearings has a large range of trapezoidal screws.
Statewide Bearings can supply customisation of nut design and machining of the screw to suit individual requirements. Typically for cost effective solutions quantities in the range of 500-1000 pieces is desirable. That said, for prototyping purposes we can supply in ones and two’s or smaller volumes.
THK manufactures a nut formed by die castings of a special bearing alloy with high abrasion resistance. Other manufacturers typically use bronze or POM plastics for Trapezoidal nuts.