SMC MKB40-20LZ Pneumatic Rotary Clamp Cylinder

The SMC MKB40-20LZ is a rotary clamp cylinder from the MK series, designed for clamp-and-rotate tasks in automation fixtures, offering a 40 mm bore and a 20 mm clamp stroke with left-rotating clamping action. It can be mounted via through-hole or end-tapped configurations (style B) and provides port connections in M thread sizes (M12–M25) or Rc thread sizes (Rc32–Rc63), with the option to run two auto-switches or none. The unit supports auto-switch mounting on four surfaces, and there are variants with built-in magnets for auto-switch functionality (such as the MKB40-20LZ-M9PZ) or without. Mounting dimensions are interchangeable with the MK series, facilitating straightforward replacements and integration with other SMC components. This compact rotary clamp is well-suited for repeatable clamping and indexing in assembly lines, fixtures, or robotic workstations where precise left-handed rotation and reliable pneumatic actuation are required.