Airtac MKJ Adjustable Cylinder MKJ20X30-30
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X30-30 is a genuine MK multi-mount cylinder (adjustable stroke), 20 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 157.1 N of push force at 0.5 MPa. A bumper cushions the impact. As an MK unit a fixed rod stops the piston rod rotating.
- TypeMulti-mount, adjustable stroke
- SeriesMK (no-rotating)
- Bore20 mm
- Push thrust @0.5 MPa157.1 N
- Operating pressure0.15 - 1.0 MPa (22 - 145 psi)
- Port sizeM5x0.8
- CushionBumper
- MagnetWithout magnet
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MKJ Adjustable Cylinder MKJ20X30-30
The MKJ20X30-30 is an AirTAC MKJ multi-mount cylinder, a compact square-body pneumatic cylinder that can be fixed from 6 directions - front, back, left, right, top and bottom - and mounted side by side with other units to save space. It is a double acting, adjustable-stroke cylinder: a 20 mm bore pushing at 0.5 MPa delivers a theoretical 157.1 N of force, with a 30 mm base stroke plus a 30 mm adjustable range, so the end of stroke can be set within that extra travel. Cushioning is provided by a bumper. Magnetic-switch slots are arranged around the body for position sensing.
This is a genuine AirTAC part. The MK family is the no-rotating version of the MD standard multi-mount cylinder: a fixed rod and plate stop the piston rod from turning, which matters where the load must stay square to the body. As the SKU has no trailing S, this unit is without the magnet; thread is PT by default. We confirm exact dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X30-30 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X30-30 |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MK (no-rotating) |
| Bore | 20 mm |
| Push thrust @0.5 MPa | 157.1 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | Without magnet |
| Fluid | Air, filtered to 40 um |
|---|---|
| Operating pressure | 0.15 - 1.0 MPa (22 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to 70 C |
| Speed range | 30 - 500 mm/s |
| Cushion | Bumper |
| Mounting | Fix from 6 directions; mountable side by side |
Specifications follow the official AirTAC MD/MK multi-mount data. The front cover and piston are short, so avoid an over-long stroke. An optional high-temperature seal material extends the range to 0 to 150 C. Overall dimensions vary per stroke and allowable side-load is published as curves — ask us and we confirm from the datasheet.
How to choose
Size the bore for thrust: this 20 mm bore gives 157.1 N theoretical push at 0.5 MPa (the pull side is lower). Choose MK over MD when rod rotation must be prevented; MD is the standard multi-mount if rotation is acceptable. The MKJ adjustable-stroke variant is double acting and adds a 10, 20 or 30 mm adjustable range on top of the base stroke - this SKU adds the maximum 30 mm. Keep the base stroke within the bore 20 table (up to 60 mm), remembering the short covers mean over-long strokes should be avoided. This unit ships without the magnet; add S to the code if you need switch detection. Thread is PT by default, or G on request. Side-load capability is bore and mount dependent - confirm from the datasheet or ask us.
Applications
Jig positioning and height setting
The 30 mm adjustable range lets one fixture design cover several part heights. The no-rotating rod keeps jigs and Stops aligned, and the body fixes from 6 directions to suit tight machine layouts.
Indexing pusher on small conveyors
Mounted side by side along a line, these compact cylinders index parts between stops. The bumper cushions each stroke and the fixed rod and plate prevent the pusher face from twisting.
Small-parts clamping
Fix the square body from the top, side or bottom of a fixture. The 157.1 N push at 0.5 MPa clamps small parts in drilling, marking or assembly fixtures without magnet switching hardware.
FAQ
Should I choose MK or MD for this application?
Choose MK (this family) when the piston rod must not rotate - a fixed rod and no-rotating plate hold the rod square to the body, useful for pushers, stops and tooling that must stay aligned. Choose MD if rotation is acceptable. Both are multi-mount cylinders fixable from 6 directions; the MKJ code additionally means double acting with an adjustable stroke range.
Does this cylinder need a position sensor, and how do I confirm dimensions?
The MKJ20X30-30 is supplied without the magnet, so magnetic switch detection is not included; if you need it, order the variant with the trailing S in the code. Magnetic-switch slots are machined around the body for when the magnet is fitted. Overall dimensions and allowable side load depend on stroke and mounting, so confirm them from the datasheet or ask us.