Airtac MKJ Adjustable Cylinder MKJ20X15-20

The MKJ20X15-20 is an AirTAC MKJ adjustable-stroke multi-mount cylinder: a compact square-body, no-rotating, double-acting cylinder with a 20 mm bore, a 15 mm base stroke and an extra 20 mm adjustable range. Because the square body fixes from six directions - front, back, left, right, top and bottom - and can be bolted side by side, it packs dense actuation into tight fixtures. At 0.5 MPa it delivers about 157.1 N of theoretical push thrust, and the built-in bumper cushions the stroke at speeds of 30-500 mm/s.

This is a genuine AirTAC part. The MK family adds a no-rotating plate, brass bushing and fixed rod so the rod cannot turn - useful where a workpiece or plate must stay square. As the SKU shows, this cylinder is ordered without a magnet; the S-suffix version adds one. Operating pressure is 0.15-1.0 MPa (22-145 psi) with -20 to 70 C media (150 C only with the optional high-temperature seal material). We confirm dimensions and sizing from the datasheet on request.

Choose the 20 mm bore when you need roughly 157.1 N of push at 0.5 MPa; larger bores give more thrust, smaller ones fit tighter envelopes. The MKJ adjustable stroke gives a 15 mm base stroke plus a 20 mm adjustment band on top, letting you fine-tune stroke length without swapping cylinders - handy for setup changes on jigs and fixtures. Double acting gives powered strokes in both directions.

This is the MK (no-rotating) family, so rod rotation is prevented; if rotation does not matter, the MD family is the standard alternative. This SKU has no magnet - order an S-suffix model if you need switch sensing. Threads are PT by default; G threads are available on request. Note the short covers: keep strokes within the bore's table (up to 60 mm for a 20 mm double-acting bore) to avoid over-long unsupported strokes, and route side-load questions to us.