For "worked penetration" and "prolonged worked penetration" tests to determine consistency of lubricating greases. Consists of single or dual steel ASTM grease workers mounted on a sturdy base and driven by a powerful gear reduction motor. Meets ASTM specifications for stroke length and rate. Equipped with a presetting electronic counter that automatically shuts off the drive motor after any desired number of strokes up to 99,999. Steel grease workers have threaded cup and cover, and steel plunger plate with shaft and handle that connects to eccentric cam on drive unit. Accessory dial thermometer inserts in plated vent cock. Spring loaded tightening clamps hold grease workers securely on base, and steel pins in base facilitate disassembly of grease workers after testing. Drive Motor: fan cooled gear reduction type, 1/3hp (single-unit model) or 1/2 hp (dual-unit model). Conforms to: ASTM D217, D4950; IP 50; ISO 2137; DIN 51804; FTM 791-311. Shipping Weight: Single-Unit: 141 lbs (64.0kg), Double-Unit: 171 lbs (77.6kg). Dimensions: 4.2 Cu. ft.