, which is claimed to
reduce transmission noise by up to 20dBA and cut energy consumption by up
to 6%, is now available from BSL outlets throughout the country. The
Eagle PD synchronous drive system is based on a helical offset tooth
design that forms a chevron pattern, so the teeth engage progressively,
unlike straight-tooth timing belts. The system delivers 98% efficiency,
which is between 5 and 6% higher than that offered by V-belts and
pulleys. BSL has around 1,000 sprocket combinations, providing a wide
range of gear ratios.