Moment of Inertia and Cushion Data

Concentrated Weight at Radius	Thin Ring or Hollow Cylinders
Hollow Sphere and Solid Sphere	Solid Cylinder or Disc
Thin Rectangular Plate about End	Thin Rectangular Plate about Center
Thin Rod about End	Thin Rod about Center

Model Number	Actuator Torque Factor	cushion Decel Arc	Cushion Capacity
A-100 A-500 A-1,000 A-4,000 A-10,000	1.00 5.00 10.00 40.00 100.00	.84 .39 .35 .30 .26	210 430 665 1,920 3,380

Model Number	Actuator Torque Factor	cushion Decel Arc	Cushion Capacity
900 1,800 3,700 7,500 15,000 30,000 75,000 150,000 300,000 600,000	.30 .60 1.23 2.50 5.00 10.00 25.00 50.00 100.00 200.00	.25 .25 .33 .33 .34 .34 .24 .24 .27 .27	335 335* 1,670 1,670* 6,290 6,290* 19,800 19,800* 81,000 81,000*

* per cushion

Cushion Needle Adjustment

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

CAUTION:
Cushion needle adjustment is a crucial factor in achieving optimum cushion performance. If the needle valve setting is too far open, cushion capacity will be reduced or rendered ineffective; if set too tight, cushion action will generate shock and pressure spikes in excess of actuator rating