Check the listing for details. Aronson Model DCG180 18000 Lb Drop Center Gravity Welding Positioner. Condition: Used. Listed at 99500.00 USD. Pre-Owned Aronson Model DCG180 Drop Center Gravity Welding Positioner. Tilt Torque 600,000 Lb - In @ 135 Degrees in 47 Sec. Drop Center from Tilt 30”. Rotation Speed 0.40RPM. 115 V Remote Pendant. EQUIPPED WITH.