Series A End Cap Options

Stroke adjustors are screw-type adjustable stops at end of rotation. They should be used when the exact final position of rotation is best determined on the assembled machinery or when final position requirements may vary with different machine set ups.

Cushions are designed to protect the actuator from damaging impact at the end of rotation. When properly sized and adjusted, cushions may also provide smooth deceleration, external energy absorption and noise reduction.

Cushions trap fluid at the end of stroke by blocking or restricting the discharge port. The trapped fluid is diverted through a small needle valve which generates a back pressure on the discharge side of the piston.

This back pressure resists the forces exerted on the rack by the propelling action of the actuator and the slowing of external mass which imparts energy into the actuator through the shaft. A check valve is included to bypass the cushion action at the start of rotation in the reverse direction.

Adjustable cushion and stroke adjustors are combined as a single end of stroke option.

The Ohio Oscillator design moves the cushion engagement position along with the end of stroke adjustment so the full engagement length of the cushion is retained at any stroke adjustment setting.

Caution: Cushion needles should be set between one half and one full turn from seated position. Setting should result in continuous speed reduction throughout the cushion length. Needle adjustment is set too tight when there is an abrupt change in speed as the actuator enters the cushion. Never operate with needle in seated position or unscrewed beyond the point where the seal relief in the thread is visible.