Couplings - Ondrives - #19

Operation

Inner Plates

Outer Plates

Adjusting Nut Torque Pins

Inner Plates

Keyed to Flats on Hub

Output Pulley Housing Cartridge

The clutch consists of two assemblies: a cartridge and a housing (see above). The cartridge is set screwed or keyed to the input shaft. The housing is either set screwed or keyed to the output shaft or, (as shown), is attached to the output gear or pulley, with a bronze bearing to allow relative motion between the input shaft and the output gear/pulley. Torque is transmitted from the flats on the hub to the mating flats on the inner plates, through the friction pads to the outer plates, through the torque pins to the housing and the output gear/pulley. The torque level is controlled by compressing the springs with the adjusting nut. For a fixed torque clutch, a collar is attached to the hub in a fixed position, instead of the adjusting nut. In operation, either the input shaft or the housing can be the input member, with the other member being driven.

All slip clutch torques are calibrated to ±20% but can be held to closer tolerances. Backlash of 6° is standard for both slipper and series 16 slipper and 2° for the Slip-Ease line. Slipper models can be held to 2° if required.

IDENTIFICATION S A S 24-6-8

^— 8 is the housing bore

Shaft to Pulley versions - Insert shaft into cartridge and tighten set screws. Insert housing around input shaft, with torque pins engaging holes in outer plates. Input shaft will keep the cartridge and housing aligned.

Shaft to Shaft versions - Insert input shaft into cartridge and tighten set screws. Insert output shaft into housing and tighten set screws. Input and output shafts must be properly journaled with centrelines within ±0.10 T.I.R.

Do not lubricate the clutch. Friction materials are designed to run without additional lubrication. Lubrication will cause a change in torque and erratic behaviour. The inherent axial loaded design will keep dirt and dust out of the friction surfaces.

6 is the cartridge bore

1—24 is the outside diameter in sixteenths of an inch. Standard sizes are 16, 20, 24, 32, 44 and 52.

I—"S" is shaft to shaft. "O" is shaft to pully or gear. "Y" is cartridge alone.

L-"A" is adjustable torque. "F" is factory preset torque.

—Type of Clutch: S = Multi-Plate, P = Single-Plate, E = "Slip=Ease", A = Air Actuated, R = Double Plate.

The clutch capacity as noted in this catalogue is based on continuous operation at 50RPM for over 25 million cycles. Torque, RPM, duty cycle and life are interdependent. A reduction of any of these will allow an increase in any other. (Running at 25 RPM will allow twice the torque, or running for only 10% of the cycle will allow higher RPM, etc.) The limit is based on heat buildup measured in watts per: Watts = Torque (inch pounds) x RPM x .011 Air actuated clutches have the same capacity as mechanical ones. However, when used for rapid engage/disengage, a limit of 50% of normal capacity should be used.

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