The Therm-O-Type SL-12 is powered by a DC motor with full speed control, the SL-12 can slit up to 120,000 finished cards per hour with hairline accuracy. Nine pairs of spring loaded scissor cut blades are mounted on large diameter steel shafts. The large diameter of the blade shafts assures minimal flexing, reducing the chance of blade or shaft damage if there is ever a paper jam, and also improving blade life. Like all THERM-O-TYPE production slitters, the SL-12 uses an exterior drive which is easy to service and features a unique double gearbelt drive. While competitive slitters use inexpensively formed sheet metal blades, which are susceptible to chipping, THERM-O-TYPE SL slitters use a thick, machined and ground, blade which can be resharpened. This blade is almost impossible to chip through normal operation and is very durable. Gripper and tail trim is deposited into a removable canvas bag mounted within the steel cabinet. The slow delivery conveyor on the SL-12 is 36" long and features full length partitions between each row of cards.