Drilling, Screwing and Tapping Perspex
Conventional twist drills for use with wood are suitable for use with Perspex® and hole-saws may be used for larger holes greater than 12mm diameter. However, it is advisable to re-grind twist drills to give a zero rake.
A small pilot hole should be drilled first to locate the drill and where possible, the work should be supported by a back stop made from either scrap Perspex® or wood to prevent splintering the exit hole.
The use of coolants is recommended for any deep drilling and swarf should be removed at regular intervals.
Screwing and tapping Perspex
Standard taps and dies may be used for cutting screw threads in Perspex® with the use of lubricants essential.
Wherever possible, coarse threads are preferred as they are less liable to damage.
If frequently dismantling, threaded metal inserts would be recommended.