FAQ: Resin Fiber Discs
Why are there different back-up pads for a resin fiber disc? What makes them unique?
Each backing type helps different types of applications. Soft back-up pads are primarily used for lighter applications with a recommended grit range of 80-120. Hard back-up pads are for heavy duty applications, with a recommended grit range of 36-40. Zirconia and Ceramic resin fiber discs are also recommended for hard back-up pads.
What are the dimensions listed on a resin fiber disc?
The dimensions are listed as follows: diameter x arbor hole size.
What is the benefit of a resin fiber disc over a flap disc?
A resin fiber disc is more aggressive and designed for faster stock removal, and typically less expensive.
What is the size of the arbor on a 4-1/2″ resin fiber disc?
The arbor size for a 4-1/2″ resin fiber disc is 7/8″, or you can have a 5/8-11″ button if that is more preferable.
What are common applications for a resin fiber disc?
The most common applications are weld removal, spatter cleaning, beveling, and slag removal.
What grains are available in a resin fiber disc?
The available grains for a resin fiber disc are aluminum oxide (AO), zirconia alumina (ZA), silicon carbide (SiC), and ceramic.
What are common sizes or diameters for a resin fiber disc?
The most common resin fiber disc sizes are 4-1/2″, 5″, and 7″.
What should I ask when getting information for a resin fiber disc?
The information you need involves the size diameter, size arbor, grain, and material.
What grain resin fiber disc should be used on stainless steel?
ceramic resin fiber discs are optimal on stainless steel.
When using a resin fiber disc, what grain should be used on aluminum?
Aluminum oxide grains are typically used on aluminum.
What grain resin fiber disc should be used on mild steel?
Zirconia or ceramic grains have been proven to be optimal on mild steel.
What grits are common for a resin fiber disc?
The standard grits for a resin fiber disc run at 24, 36, 50, 60, 80, and 120.
What is considered a general purpose resin fiber disc?
General purpose falls under either the aluminum oxide or zirconia alumina grains.
When is a silicon carbide resin fiber disc used?
Silicon carbide resin fiber discs are used for grinding on composite, rubber, or plastic work pieces.
What is the RPM rating for resin fiber discs?
The RPM ratings for a resin fiber disc is controlled by the rating on the backing pad.
How is a resin fiber disc held on a grinder?
A resin fiber disc is held on a grinder with a back-up pad and center nut.
What tool is user to take the center nut off and on?
A spanner wrench is used for this purpose.
Are there different types of backing pads for resin fiber discs?
Resin fiber discs can typically be used with a flexible, medium, or rigid backing.