Gearboxes Series RS & RT - Varvel

Gearboxes Series RS & RT
Product description
Multipurpose mounting
Aluminium die cast
and Cast iron (from size 110 up)
Wormshafts
ZI profile,
Hardened and ground.
Alloy steel.
RS
Input
IEC and NEMA
motor adapters and
Universal Elastic Coupling
Wormwheels
Bronze alloy cast
onto a cast iron hub.
RT
Oil seals
Nitrile Butadiene Rubber - NBR
as standard;
Viton and Silicone on request.
Bearings
Ball or roller types.
Tapered roller bearings
For heavy duty operation.
Output
Hollow bore as standard;
Single or Double solid shaft
on request.
Modular attachments
Helical one stage gearbox,
Output Flange, Torque Arm and Torque Limiter.
Single worm gear boxes RS and RT
The worm gearboxes, RS and RT series, specifically designed for universal mounting, are manufactured with
die cast housings and covers in aluminium up to the size 85 and cast iron from the size 110.
Torques listed in selection tables are output torque values for the specific size, and motor powers are always
referred to 1440 rpm.
Input Viton oil seals, fitted on request, allow trouble-free operation with 2-pole standard ac motors or 3000
rpm dc motors and Silicone oil seals for low temperatures.
Gearboxes are delivered filled with synthetic long-life oil (without plugs), in quantities as recommended on
page 17, and valid for all mounting positions.
Selection table data are intended for service factor SF1.0 i.e. 8-10 running hours per day, uniform load, less
than 6 start/ stops per hour, and room temperature ranging from 15 to 35 °C .
Helical worm gear boxes RA and TA
The gearboxes, RA and TA series, made up of an independent single stage helical gearbox FXA fitted to a
standard FRS or FTR gearbox, allow greater output torques and higher efficiency than the FRS and FRT
gearbox with equivalent ratios.
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