Rodless cylinders are pneumatic tools that use the force of compressed air to move a piston. Unlike many air cylinder varieties, many of which feature pistons attached to rods of varying dimensions, rodless cylinders feature pistons that are not connected to rods. The reasons for employing rodless cylinders vary depending on context. Rodless cylinders are prized because they use less space than do cylinders that use rods.
Related Categories

Rodless Cylinders
Rodless cylinders are comparatively compact and easy to install; they can also directly carry a load without the need for additional bearings and structures. Rodless cylinders are useful in a variety of applications. For long-stroke applications, rodless cylinders are ideal because they are protected from bending, piston binding, and uneven seal wear. Rodless cylinders can also be used for material handling, lifting and loading, conveying, feeding, cutting and for many other applications. Rodless cylinders allow for rotational movement and other non-lateral forms of movement; rotary cylinders, which move loads rotationally, are a variety of rodless cylinder. Cable cylinders are another common type of rodless cylinder; instead of featuring a rod attached to once side of a piston, a tense cable is attached to both sides of the piston and set on rollers outside of the bore.
All air cylinders use the force of compressed air to move a piston. That piston is connected in some way to a load. In the case of rod-equipped air cylinders, the load is attached to a rod, which is itself attached to the piston. Unequal weight distribution in a rod-equipped air cylinder can cause the cylinder to fail; the rod can become deformed or broken, or the seals or piston can become damaged as a result of excessive strain. Rodless cylinders are capable of bearing loads that are incompatible with rod-equipped cylinders. Rodless cylinders use a radial yoke instead of a longitudinal rod to connect the piston to its load. These cylinders have a barrel that is formed with a longitudinal slot, permitting the connection of the piston to a load mounting carriage. A hardened band pneumatically seals the cylinder, while another band on the exterior closes the slot and prevents contamination of the cylinder's interior; a system of slide rails divides the two bands in the pressure-free zone between the two piston seals, which allows movement of the mounting carriage.