Convolute Wheels

Convolute wheels are used in a variety of different processes including edge breaking or radiusing, deburring, light deburring or blending, heavy deburring, finishing, and light corrosion, rust or oxidation removal. Preferred Abrasives’ convolute wheels consist of compressed nonwoven abrasives which are wrapped convolutely around a center core, producing a harder, one-directional wheel. Resin ratios and winding tension determine wheel density.

Convolute wheels feature continual exposure of cutting grains and consistent finishing ability throughout the product life. They minimize undercutting or gouging and provide an extremely consistent finish.
To help define our grading system, following are some of our popular grades: , 7SF, 8SF, 9SF, 9AF, or 9AM grade convolute wheels. The first digit corresponds to the density (hardness), the second digit corresponds to the grain (A stands for aluminium oxide and is used to produce a satin finish and S stands for silicon carbide and is used to produce a brighter, shiny finish), and the final digit is the grade designation (F stands for Fine, M stands for Medium).

We offer 7, 8, and 9 level hardness convolute wheels. Hardness is determined by the amount of abrasive bond and is dependent on the grit type of the wheel, among other factors. If you are unsure which level hardness to start with, we suggest working with a level 8 hardness convolute wheel and then adjusting as needed for your particular project.

Our convolute wheels can be used on most materials, the most common are:

• Stainless Steel
• Carbon steel
• Aluminum
• Brass
• Copper
• Titanium
• Inconel