Table 1. Guide to the Selection and Application of Abrasive Belts
Belt Speed
Contact Wheel
Type of Operation
Type of Grease Lubricant
Durometer Hardness
Material
Abrasive Belt a
Grit
fpm m/min
Type
Roughing R/R Al 2 O 3
24–60 4000–6500 1219–1981 Light-body or none 80–150 4500–7000 1372–2134 Light-body or none
Cog-tooth, serrated rubber
70–90 20–60 20–40 70–90 30–60 20–40 70–90
Hot-and Cold-Rolled Steel
Plain or serrated rubber, sectional or finger-type cloth wheel, free belt
Polishing R/G or R/R Al 2 O 3
Fine Polishing R/G or electro-coated Al 2 O 3 cloth
180–500 4500–7000 1372–2134 Heavy or with abrasive compound Smooth-faced rubber or cloth
Roughing R/R Al 2 O 3
50–80 3500–5000 1067–1524 Light-body or none 80–120 4000–5500 1219–1676 Light-body or none 150–280 4500–5500 1372–1676 Heavy or oil mist
Cog-tooth, serrated rubber
Stainless Steel
Plain or serrated rubber, sectional or finger-type cloth wheel, free belt Smooth-faced rubber or cloth
Polishing R/G or R/R Al 2 O 3 Fine Polishing Closed-coat SiC Roughing R/R SiC or Al 2 O 3
24–80 5000–6500 1524–1981 Light 100–180 4500–6500 1372–1981 Light
Cog-tooth, serrated rubber
Aluminum, Cast or Fabricated
Plain or serrated rubber, sectional or finger-type cloth wheel, free belt
Polishing R/G SiC or Al 2 O 3 30–50 Fine Polishing Closed-coat SiC or electro-coated Al 2 O 3 220–320 4500–6500 1372–1981 Heavy or with abrasive compound Plain faced rubber, finger-type cloth or free belt 20–50
Roughing R/R SiC or Al 2 O 3
36–80 2200–4500 671–1372 Light-body 100–150 4000–6500 1219–1981 Light-body
Cog-tooth, serrated rubber
70–90 30–50 20–30 50–70
Copper Alloys or Brass
Polishing Closed-coat SiC or electro-coated Al 2 O 3 or R/G SiC or Al 2 O 3
Plain or serrated rubber, sectional or finger-type cloth wheel, free belt
Fine Polishing Closed-coat SiC or electro-coated Al 2 O 3 180–320 4000–6500 1219–1981 Light or with abrasive compound Same as for polishing
Roughing R/R SiC or Al 2 O 3 Polishing R/G SiC or Al 2 O 3
24–80 4500–6500 1372–1981 Light-body 100–180 4500–6500 1372–1981 Light-body
Hard wheel depending on application
Nonferrous Die-Castings
Plain rubber, cloth or free belt 30–50 Fine Polishing Electro-coated Al 2 O 3 or closed-coat SiC 220–320 4500–6500 1372–1981 Heavy or with abrasive compound Plain or finger-type cloth wheel, or free belt 20–30
Roughing R/R Al 2 O 3 Polishing R/R Al 2 O 3 Fine Polishing R/R Al 2 O 3
24–60 2000–4000 610–1219 None 80–150 4000–5500 1219–1676 None
Cog-tooth, serrated rubber
70–90 30–70 30–40 70–80
Cast Iron
Serrated rubber
120–240 4000–5500 1219–1676 Light-body 36–50 700–1500 213–457 Sulfur-chlorinated 60–120 1200–2000 366–610 Light-body
Smooth-faced rubber
Roughing R/R SiC or Al 2 O 3
Small-diameter, cog-tooth serrated rubber
Titanium
Polishing R/R SiC Fine Polishing R/R SiC
Standard serrated rubber Smooth-faced rubber or cloth
50
120–240 1200–2000 366–610 Light-body 20–40 a R/R indicates that both the making and sizing bond coats are resin. R/G indicates that the making coat is glue and the sizing coat is resin. The abbreviations Al 2 O 3 for aluminum oxide and SiC for silicon carbide are used. Almost all R/R and R/G Al 2 O 3 and SiC belts have a heavy-drill weight cloth backing. Most electro-coated Al 2 O 3 and closed-coat SiC belts have a jeans weight cloth backing.
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