Wacker Neuson’s new line of cut-off saws, BTS 630 and BTS 635, have a three-stage air filter system that includes a cyclonic filter, a foam pre-filter, and a paper filter. Pistons and cylinders are protected by a special coating, and pistons have two piston rings for extended service life. The BTS 630 weighs 24 pounds and has a 12-inch blade diameter with 0.08-inch (20 mm) arbor. The BTS 635 weighs 24.5 pounds and has a 14-inch blade diameter and 1-inch arbor. The BTS 635S weighs 24.9 pounds and offers a soft start option, which includes a spring system that supports the starter mechanism and reduces the effort required to pull the starter rope.