Power Jacks has introduced a range of ram actuators that make suitable
replacements for hydraulic cylinders. The new BFA units comprise electric
motor, gearbox and ball screw, configured with a double clevis end and
parallel motor arrangement that will fit into most hydraulic cylinder
type spaces. Three standard sizes offer forces of 25kN, 75kN and 125kN
and speeds of 1,600mm/min (full rated load) or 5,500mm/min(reduced load).
The dynamic ball screw drive has two screw leads as standard, with
integral safety device in the ball nut. This arrangement provides early
warning of ball screw failure and allows the actuator to sustain a load
in the event of catastrophic ball failure. The gearbox accepts any IEC
motor as standard, including energy efficient and brake motors, or
inverter rated and combined motor/inverter units for speed control.
Back to Mechanical Components Octoer 2000