Type of Rubber Cover Grades
COVER GRADE CHARACTERISTICS AND APPLICATION PHYSICAL PROPERTIES
General Purpose Belting Standard Before Ageing After Ageing Maximum Abrasion Loss mm3
Tensile Strength MPa Elongation % Temperature of Ageing °C Duration of Ageing hrs. Change In Tensile Strength % Change in Elongation %
GRADE M-24
This Grade is recommended for conveying heavy, sharp, highly abrasive materials like metallic ores, granite, lime stone, coal, Blast furnace slag & clinker etc. IS 1891 PART-I BS 490 PART-I ISO 4195/1 DIN 22102 24 450 70 72 +10 -20 +10 -25 150
GRADE N-17
Recommended for conveying less severe and moderately abrasive material like sized coal, ash, chalk, bauxite etc. IS 1891 PART-I BS 490 PART-I ISO 4195/1 DIN 22102 17 400 70 72 +10 -20 +10 -25 200
GRADE N-17 SYNTHETIC
Composed of Synthetic Rubber mainly, this grade is suitable for arduous application as M-24 and has similar wear resistance properties. IS 1891 PART-I 17 400 70 72 +10 -20 +10 -25 150
HEAT RESISTANT BELTING
GRADE HR(T-1)
This grade is recommended for conveying hot material and suitable for fines upto 100°C and coarse material upto 125°C. IS 1891 PART-II 12.5 350 100 72 -25 -40 200
GRADE HR (T-2)
This grade is recommended for conveying hot material and suitable for fines upto 125°C and lumps upto 150°C. IS 1891 PART-II 12.5 350 125 72 -35 -50 250
SUPER HEAT ULTIMA
Specially blended with a compound of EPDM and Chlorobutyl, this grade is recommended for applications where material temperatures beyond 150°C are involved. "ARM" STANDARD 12.5 350 150 72 -35 -50 250
FIRE RESISTANT BELTING
GRADE FR
Having fire resistance and antistatic properties, this grade is recommended for use where a fire hazard exists eg. Thermal Plants. Underground Mines. CSA-M422-M87 IS 1891 PART-V DIN-22103/ISO 340 17 350 70 72 +10 -20 +10 -25 175
OIL RESISTANT BELTING
GRADE OR
Composed of Synthetic Rubber Compounds this grade is resistant to mineral, vegetable, animal oils and fats. IS 1891 PART-III 12 250 70 72 ±35 ±35 NOT SPECIFIED
HYGIENIC BELTING
GRADE HYGIENIC
This cover grade is specially designed with nontoxic Rubber Compounds for use in the food processing, pharmaceutical Industry. IS 1891 PART-IV 10 350 70 72 +10 -25 +10 -45 NOT SPECIFIED
"ARM" PROFILE BELTING
These Beltings are specially designed with a Rough/Pimpled or Ribbed Carrying Surface to prevent slippage and ideally suited to carry packaged material on gradients of more than 20° "ARM" STANDARD
CHEMICAL RESISTANT BELTING
GRADE CMR
This specially designed grade of Conveyor Belting incorporates a Top Cover of Nitrile Rubber and Bottom Cover of cloroprene to withstand the chemical and abrasive action of material like Potash. Urea, etc. It also overcomes the problem of "Reverse Toughing" faced in conveying such material on Belting with normal Cover Grades. "ARM-STANDARD IS 1891 PART-I 12 350 70 72 +10 -20 +10 -25 150

Chart for Belt Selection
Belt Designation Full Belt Tensile Strength Maximum Recommended Working Tension Nominal Carcass Thickness Nominal Carcass Weight Maximum Belt Width (mm) for adequate load support Bulk Density (T/m3) Minimum Belt width (mm) For adequate Troughlng
Type Rating KN/m Vulcanised Splice Mechanical Fasterners (mm) Kg/cm/ mtr Upto 1.0 Upto 1.5 Upto 2.5 20 Deg. Idlers 30 Deg. Idlers 45 Deg. Idlers
(kN/m)
GENERAL DUTY 200/2 200 20 20 2.4 0.02 650 500 - 300 400 500
250/2 250 25 25 2.5 0.02 650 600 - 300 400 500
315/2 315 31 31 2.7 0.02 900 650 500 300 400 500
315/3 315 31 31 3.2 0.03 1000 800 650 400 500 500
400/2 400 40 40 2.8 0.03 1000 800 650 400 500 500
400/3 400 40 40 3.4 0.03 1200 900 650 500 500 500
500/3 500 50 * 3.4 0.03 1200 900 650 500 500 500
630/3 630 63 * 3.5 0.03 1200 1000 800 500 500 500
HEAVY DUTY 200/2 200 20 20 2.8 0.03 800 650 500 400 400 500
250/2 250 25 25 3 0.03 800 650 500 400 400 500
315/2 315 31 31 3.1 0.03 1000 800 650 400 500 500
315/3 315 31 31 3.6 0.03 1200 1000 800 500 500 500
400/2 400 40 40 3.2 0.03 1200 1000 800 500 500 500
400/3 400 40 40 3.6 0.03 1200 1000 800 500 500 650
400/4 400 44 40 4.5 0.04 1200 1000 800 500 500 650
500/3 500 50 * 3.7 0.03 1400 1000 800 500 500 650
500/4 500 55 * 4.5 0.04 1400 1200 900 500 650 650
630/3 630 63 * 3.9 0.04 1600 1400 1200 650 800 800
630/4 630 70 * 5 0.05 1800 1600 1400 650 800 900
800/4 800 90 * 5.4 0.05 1800 1600 1600 650 900 900
1000/4 1000 110 * 5.8 0.05 2000 1800 1600 800 900 1000
1000/5 1000 110 * 6.6 0.07 2000 1800 1600 800 900 1000
1250/4 1250 140 * 6.5 0.06 2000 2000 1600 800 900 1000
1250/5 1250 140 * 7.1 0.08 2000 2000 1600 900 900 1000
EXTRA HEAVY DUTY 400/4 400 44 * 4.8 0.06 1200 1000 800 500 500 500
500/4 500 55 * 4.8 0.06 1600 1200 900 500 500 500
630/4 630 70 * 5.6 0.06 1800 1400 1200 500 650 800
800/4 800 90 * 6 0.07 1800 1600 1400 650 800 900
800/5 800 90 * 6.5 0.07 1800 1600 1400 650 650 800
1000/4 1000 110 * 6.2 0.07 1800 1800 1400 800 800 900
1000/5 1000 110 » 7 0.08 2000 1800 1600 800 900 1000
1250/4 1250 140 * 6.8 0.08 2000 1800 1600 800 800 900
1250/5 1250 140 * 7.5 0.09 2000 1800 1800 800 900 1000
1400/4 1400 145 * 7.2 0.08 2000 1800 1800 800 900 1000
1400/5 1400 155 * 8.2 0.09 2000 1800 1800 800 900 1200
1600/4 1600 180 7.4 0.08 2000 2000 1800 800 900 1200
1600/5 1600 180 8.8 0.1 2000 2000 1800 800 1000 1200
1800/6 1800 190 * 10.6 0.11 2000 2000 2000 900 1000 1200