Wheels: Grinding Wheels: (Bonded Abrasives) For all applications: carbide, creep-feed, internal, gear, plunge, surface, disc grinding, etc...
Various grains and bonds depending on your surface needs.
Belts + Rolls + Discs
Abrasive media comes in all shapes, sizes and bonds: vitrified and resin is the pre-form category. It can be rapid cut or non-cut polishing in bond. Finish requirements set the standard for proper choice.
Ceramic or vitrified is the largest volume in use today. It abrades well in all equipment, is relatively clean in cutting and surface preparation and settles out in simple water treatment systems. This material is always run wet, therefore an antioxidant and/or cleaner will perform very well in finishing.
Plastic (resin) media is somewhat different. It is lighter in volume (pounds/cubic foot). Ceramic normal weights 85-90 lbs/cu. ft. Resin weights 55-60 lbs. /cu. ft. Plastic has same cut or non-cut features. Plastic media is normally used prior to plating where low micro-inch finish (Ra value) is required. Since plastic media weights less it is more forgiving on finish. It will have reduced impingement. It will not yield high color, however.
Random shape is the third category. These materials are random in size and are classified by mesh sizes; 3/8x1/4 would be an example. These shapes are ideal for parts not having a lodging affinity. Materials available in this area are aluminum oxide, corundum and quartz.
The last type of media is steel form. This is a pre-form forged from carbon or stainless. It finds its nitch in ball burnishing. There are some applications for steel impingement to close porosity on castings.
Selection of media again depends on the finish requirement of the parts to be refined. ACA has a complete selection for your evaluation.
Blasting grains sizes come in coarse and fine gradations. 24, 36, 46, 50 & 80 are a good range of coarse grits. Fine grits are in 180, 240, 320 and 400. Not all companies use the same numbering system, but cross reference charts assist in choosing the correct size.
These gradations are found in man-made: aluminum oxide, silicon carbide, plastic composite and glass bead; natural minerals are zirconia, quartz, silica and other combinations of these.
There are also natural abrasives used in industry. They are walnut shells, pecan shell and other fruit shells that provide a soft finishing cut rather than a hard abrasive. Unfortunately these materials have a shorter lifecycle than manmade materials.
Steel shot is also another blasting media used by many who repaint furniture, large containers and steel structures.