Flap Disc Tests on Stainless Steel

For stainless steel, PREDATOR™ Flap Discs provide extremely fast weld removal combined with superior life compared to all other Flap Discs in the market. PREDATOR™ is well suited for all mild steel, high alloy, nickel alloy and stainless steel. In regards to Zirconia and Aluminum Oxide, The structure is meta-stable and under heat and/or pressure the structure fractures producing new cutting edges. This gives the grain a longer cutting life and is especially suited to coarser stock removal applications typically 24 to 80 grit. It is a more expensive grain but the improved performance usually outweighs the cost. We go more in depth on the dynamics of our PREDATOR™ and Zirconia test results, which can be read through this case study.

Our testing for Flap Discs are usually done with a right-angle grinder operating between 10,000 to 15,000 RPM using various metals such as stainless steel, aluminum and titanium alloy to ensure an accurate result. To determine more accurate rates, we weigh the product every minute as well as before and after testing to determine product life.

When Should You Use Flap Discs?

flap disc diagram shows use in heavy stock removal usually working on stainless steel

Flap discs are used in heavy stock removal, usually weld removal. The metals used are usually stainless steel and other compounds. They outperform Resin Fiber Discs due to their increased lifetime. Resin Fiber discs are only two dimensional, so once the abrasive surface wears down, the product is finished. To achieve a finish equivalent to a resin fiber disc, always use a flap disc that is a coarser grit. For example, if the operator is running a 60 grit resin fiber disc, try a 40 or 50 grit flap disc. Also know that PREDATOR™ provides various products such as Resin Fiber Discs that get the job done.

If you are new to this or want a fresh start in learning how to use flap discs and when to use the right product and tool, whether it is on stainless steel or another metal alloy, visit this blog on how to achieve optimum performance with your abrasives by Euromarc.