1262PH/497H Branded Multi-Ribbed Poly V-Belt 1262mm/49.7 Inch Length

H Section Poly V-Belts: Poly V belts (also sometimes known as serpentine belts) are a single continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air con etc. To allow the belt to pass over more than three pulleys with a large enough wrap angle to avoid slipping, idler pulleys which press against the back of the belt are included, forcing the belt into a serpentine shape. To accommodate this bidirectional flexing while remaining strong enough to transfer the total force required by multiple loads, a serpentine belt is almost always of multi-groove (multi-vee, poly-v, or multi-rib) construction. It is more efficient than the older multiple belt system and may consume less space in the engine compartment. By using a single, wider belt instead of multiple, thinner belts, the belt may be put under increased tension without stretching. Higher tension reduces slip, which increases belt life and mechanical efficiency. Benefits include high resistance to oil, dust and cracking, antistatic, wide temperature range -18 deg C to +100 deg C.