Airtac MKJ Adjustable Cylinder MKJ20X70-50S
The AirTAC MKJ Adjustable Cylinder MKJ20X70-50S is a genuine MK multi-mount cylinder (double rod, 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, double rod, 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
- MagnetWith magnet (sensor-ready)
- 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 MKJ20X70-50S
The MKJ20X70-50S is an AirTAC MKJ adjustable-stroke, no-rotating multi-mount cylinder with a 20 mm bore and a 70 mm base stroke tuned across its wide adjustable range. The square body fixes from 6 directions - front, back, left, right, top and bottom - and cylinders mount side by side to save space, with magnetic-switch slots machined around the body. As a double-acting unit it produces roughly 157.1 N of theoretical push force at 0.5 MPa, cushions with a bumper, and its fixed rod and no-rotating plate keep the rod from turning under load.
This is a genuine AirTAC part from the no-rotating MK family; the MD family is the standard type where rod rotation is allowed. The trailing S means the magnet is fitted for magnetic switch detection, and the thread is PT as standard (G on the -G suffix). Overall dimensions depend on stroke and adjustment, so route sizing and mounting questions to the datasheet, which we supply on request.
Airtac MKJ Adjustable Cylinder MKJ20X70-50S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X70-50S |
|---|---|
| Type | Multi-mount cylinder, double rod, adjustable stroke |
| Series | MK (no-rotating) |
| Bore | 20 mm |
| Push thrust @0.5 MPa | 157.1 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | With magnet (S) |
| 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 to the force: the 20 mm bore gives about 157.1 N of theoretical push at 0.5 MPa. Choose MK when the rod must not rotate - the fixed rod and no-rotating plate prevent turning - and MD when rotation is tolerable. This double-acting adjustable-stroke unit carries the widest adjustable range in the 70 mm-stroke group, so the effective stroke can be dialled in on the machine rather than fixed at order time. The 70 mm base stroke is long for such a compact body, so check the short covers and stroke combination on the datasheet before committing. The S suffix confirms the magnet is fitted; thread is PT. For allowable side load and stroke-specific dimensions, confirm with us.
Applications
Depth-setting press station
In a light press or depth-setting station, the adjustable stroke lets technicians dial the stroke in on the bench, and the no-rotating rod keeps the pressing face square to the small part every cycle.
Machine-tool positioning jig
Bolted from any of the 6 body faces onto a jig plate, the cylinder positions workpieces in tight machine-tool fixtures, with the non-turning rod holding the contact pad orientation.
Box divert and stopper duty
On small-parcel conveyor lines, top or bottom fixing suits cramped frames, and the trimmed stroke sets exactly how far a divert or stopper plate rises, while the no-rotating design keeps the plate flush to the flow.
FAQ
How much force does the MKJ20X70-50S produce, and at what pressure?
The 20 mm bore, double acting, gives about 157.1 N of theoretical push force at 0.5 MPa (the pull side is lower). Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure is 1.5 MPa (215 psi), and cushioning is by bumper. If your application needs more force, ask us about the next bore size in the same MKJ adjustable-stroke format.
Is this cylinder a good fit for long strokes in a compact machine?
It can be, but check first: the body is compact and its covers are short relative to the 70 mm base stroke, so the datasheet should be reviewed for stroke-specific dimensions, buckling and mounting detail before installation. Mounting itself is flexible - the body fixes from 6 directions and cylinders mount side by side - and the no-rotating plate plus magnet option (fitted on this SKU) suit position-control tasks. Confirm allowable side load with us for your mounting arrangement.