AUTOGARD TORQUE LIMITER SERIES 600

AUTOGARD SERIES 600 Quality and Autogard are synonymous with overload protection. The Company' s reputation for high quality products is derived from over 40 years of design, innovation and production. Autogard products are manufactured to meet ISO 9001 using the latest machine tools and high quality materials. D A E F C B 2 The specifications contained within this brochure are correct at the time of going to print. Autogard is continually reviewing and updating the specifications on all its product ranges and therefore reserves the right to change any details. The drive is transmitted through balls ' A' held in detents ' B' in opposing plates ' C' by adjustable air pressure acting on a large annular piston or a number of small pistons depending on the torque required. The air cylinder / piston assembly ' D' is separated from the rotating drive plate / adapter ' E' and plates by two deep groove ball bearings ' F' . This allows air to be supplied radially for shaft to shaft and line shaft applications and gives a long maintenance free life. As a Disengaging Clutch When required to act as a disengaging clutch, the air is dumped at the press of a button, the balls roll out of the seats without skidding to disengage the drive, and the plates are held apart by spring pressure so that no drive is transmitted by the coupling. Two more ball bearings are provided between the hub and main drive plate / adapter to give a completely free running clutch. As a Torque Limiter The overload protection for the drive is provided by the same mechanism. The supply air pressure may be set in the range 1.35 - 5.4 Bar ( 20-80 psi) to give the precise overload torque requirement using a pressure regulator. This can be done manually during normal running to take account of changing loads, or automatically using a dual regulator system with a timer or other control. This allows high start torque to be accommodated before switching to a lower running torque. When the torque setting is exceeded, the balls begin to roll out of their seating, forcing plates apart against the air pressure. This motion operates a pneumatic limit switch which ' dumps' the air pressure, disengages the clutch and releasing the drive from the overloaded machine. Re-engagement is effected in both cases simply by operating a Push Button Initiating Valve. Rotation of the drive at slow speed will then engage the clutch.