What is the belt model?
2 Answers
National standards specify seven types of V-belts: O, B, C, D, E, and F, with corresponding pulley groove angles of 34, 36, and 38 degrees. Type O: When the pulley diameter ranges from 50mm to 71mm, the angle is 34 degrees; from 71mm to 90mm, it is 36 degrees; and above 90mm, it is 38 degrees. Type A: When the pulley diameter ranges from 71mm to 100mm, the angle is 34 degrees; from 100mm to 125mm, it is 36 degrees; and above 125mm, it is 38 degrees. Type B: When the pulley diameter ranges from 125mm to 160mm, the angle is 34 degrees; from 160mm to 200mm, it is 36 degrees; and above 200mm, it is 38 degrees. Type C: When the pulley diameter ranges from 200mm to 250mm, the angle is 34 degrees; from 250mm to 315mm, it is 36 degrees; and above 315mm, it is 38 degrees. Type D: When the pulley diameter ranges from 355mm to 450mm, the angle is 36 degrees; and above 450mm, it is 38 degrees. Type E: from 500mm to 630mm, it is 36 degrees; and above 630mm, it is 38 degrees.
I've noticed many friends asking about belt model numbers, because each vehicle model uses a different belt. It depends on your car brand and engine number. For example, Toyota Camry and Honda Civic use completely different belts. You need to check your owner's manual or look for the label on the driver's side door pillar. If you've lost the manual, you can visit an auto repair shop to check using the VIN code, and many apps can now help identify the model number. When buying a new belt, make sure it matches the original factory specifications. Don't try to save money by purchasing a similar but incorrect model, as a belt that's too loose or too tight will accelerate wear, leading to noise or breakage. I learned this the hard way when I used the wrong belt model on a long trip and nearly caused engine overheating. It's advisable to regularly inspect your belt's condition and replace it promptly if you notice cracks. Generally, replacing it every 60,000 to 80,000 kilometers is considered safe. Remember, using the wrong model affects power output and may also damage the water pump or alternator. Safety should always come first.
