All 101 escalators on the Jubilee Line extension from Green Park to
Stratford are driven by Renold TW series drive units. More recently, the
company has been asked to supply additional TW drives for the New York
Metro Subway Authority's upgrade programme, which has already seen the
installation of 38 such units. These drive packages include single- and
two-speed motors up to 45kW, complete with electronic speed control and
soft start. The TW series 'Titan' specified for these contracts is a
rugged gear unit that can be supplied in sizes between 254 and 711mm and
in power capacities to 500kW. The gear sets are manufactured to close
tolerances (+/-4um), ensuring quiet and vibration-free operation. They
feature worm wheels based on the innovative Holroyd tooth form, which
transmits true angular velocity at high efficiency.
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