What considerations are important when selecting garnet abrasive?

Selection of the right garnet abrasive for your waterjet is a critical consideration. The key factors which will determine how consistently and efficiently the waterjet cuts include: 

(a) Consistent particle sizing – rogue grains cause blockages in the focussing tube

(b) Proportion of dust and fines – dust causes problems with flow characteristics of the abrasive, and fines are particles which are too small to serve any useful cutting action.
(c) The hardness of the grain - Soft grains fragment and break down on impact with the workpiece. Efficient waterjet cutting action requires tough, durable grains. Generally, such as SEPPE garnet, have been subjected to which makes this material perfect for production cutting.