Airtac MKJ Adjustable Cylinder MKJ20X25-30
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X25-30 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 MKJ20X25-30
The AirTAC MKJ20X25-30 is a no-rotating multi-mount cylinder: a compact square-body double-acting air cylinder that fixes from 6 directions (front, back, left, right, top and bottom) and mounts side by side with matching units to save space. With a 20 mm bore and 25 mm stroke plus a 30 mm adjustable stroke range, it gives a theoretical push thrust of 157.1 N at 0.5 MPa for clamping, positioning and stopping work in compact assemblies. Cushioning is a bumper. It runs on air filtered to 40 um, handles proof pressure of 1.5 MPa (215 psi), operates at 0.15-1.0 MPa (22-145 psi) and from -20 to 70 C (0 to 150 C only with the optional high-temperature seal material), at 30-500 mm/s with no added lubricant, and magnetic-switch slots surround the body.
This is a genuine AirTAC MKJ adjustable-stroke part. In the MK family a no-rotating plate, brass bushing and fixed rod stop the rod turning, unlike the standard MD family. This SKU carries no magnet code, so it is supplied without a magnet. Dimensions and sizing details are confirmed from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X25-30 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X25-30 |
|---|---|
| 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
For thrust, the 20 mm bore provides 157.1 N push at 0.5 MPa in double-acting operation. Pick MKJ over MD when the rod must stay rotation-locked; MD is the standard family where rotation is allowed. MKJ is double acting, so the full stroke is powered both ways. The 25 mm base stroke pairs with a 30 mm adjustable range (10/20/30 mm options) set on top. Keep strokes short - the compact cover limits travel - and route any side-load question to us and the datasheet. This SKU has no magnet; order the S suffix if you need switch detection. Thread is PT standard, G optional.
Applications
Pick-and-place part seating
Mount the body from the top plate of a small pick-and-place head and press parts into nests: the no-rotating rod keeps the pressing face square to the part.
Gate and stopper actuation
Fix the body from the bottom of a conveyor line and extend a no-rotating stopper blade to hold or release cartons, with matching cylinders parked side by side in narrow framing.
Fixture indexing pin
Drive an indexing or locking pin from the side of a workholding fixture; the 30 mm adjustable range lets you tune the engagement depth without swapping cylinders.
FAQ
How do I choose between MKJ and the standard MD cylinder?
MKJ is the no-rotating adjustable-stroke family: a plate, bushing and fixed rod prevent the piston rod from turning, which you need when the rod drives a plate, gripper or pin that must hold orientation. MD is the standard family where rod rotation is allowed. Both are compact multi-mount bodies that fix from 6 directions; thrust depends on bore, so at 20 mm the double-acting push is 157.1 N at 0.5 MPa.
Is there a limit on how long a stroke I can run?
Yes. The multi-mount body is compact, so its cover limits travel - keep the stroke short rather than stretching to a long stroke. The 25 mm stroke here stays within the bore 20 table (up to 60 mm for double acting), with the 30 mm adjustable range set on top. Stroke-specific dimensions and any allowable side load should be confirmed from the datasheet, which we supply on request.