The Forney 71898 7-inch type 27 Mounted masonry grinding wheel is silicon carbide and dual fiberglass reinforced. Used primarily on ceramic, masonry plastic and other non-ferrous materials. Quality made to provide fast, safe and dependable service. Designed to be used on right angle grinders. 7-Inch (177.8 mm) by 1/4-Inch (6.35 mm) with 5/8-inch – 11 threaded arbor. C24r-bf with max 8, 500 RPM. Typical spec example a24r-bf: a=used for steel, 24=grit (coarse), medium to hard BOND. The first series of letters indicates grain type; aluminum oxide (used in metal applications) Silicon carbide (Used for masonry applications) ZA= alumina zirconium used for (stainless steel and ferrous metal applications) ta=ceramic treated aluminum Oxide (used for metal applications) The second series of letters indicates grain size or grit; 8-24=coarse, 30-60=medium, 70-180=fine and 220-up=hard. The third Series of letters indicates BOND hardness; a-n=soft, o-s=medium and t-z=hard. The fourth Series of letters indicates type of BOND; bf=retinoid fiberglass reinforced (double bonded), e=shellac, rubber and v=vitrified. Wheel types; type 1=flat wheel for cutting, type Depressed center wheel, Type 28=hat shaped for grinding and type 29=flap disc for grinding and finishing. Note: harder wheel have a longer life where a softer wheel will cut faster. Fine grain=long life=slower cutting and grinding. Coarse grain=short life=fast cutting or grinding. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.
- The product is 7″ X 1/4″, masonry, type 27, grinding wheel
- Easy to use
- The product is manufactured in China
- Silicon carbide and dual fiberglass reinforced for strength with masonry applications
- Used primarily on ceramic, masonry, plastic and other non-ferrous materials
- Quality made to provide fast, safe, dependable service
- Designed to be used on right angle grinders