Water jets can be used to cut many things with water only. The system produces a small diameter stream of water with enough force to cut many types of rubber and and foam rubber. The features can be very small. The cost of water only cutting can be lower than when using abrasive as the abrasive is a significant cost in the process.
The material is .125 fluorosilicone rubber. Water jet can be a cost effective way to produce such parts in quantities of 10’s, 100’s, or 1,000’s.
Material is 1/2” silicone rubber.
This is water cutting 3/8” foam rubber that is used as ejection rubber on steel rule dies. The water stream is visible under the head and above the water if you look carefully.