Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 225mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- 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 SAIJ50 Adjustable Cylinder SAIJ50AX225-20
The AirTAC SAIJ50X225-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 205 to 225 mm usable travel window, allowing you to dial back the nominal 225 mm stroke by up to 20 mm without adding external stops. In this configuration, the piston rod is manufactured from SUS420J2 stainless steel and the PT tapered port threads ensure a tight, reliable pneumatic connection.
Delivering 982 N of push force and 825 N of pull force at 0.5 MPa, this 50 mm bore actuator bridges the gap between lighter 40 mm units and the 1559 N thrust of a 63 mm bore. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster functions strictly as a travel stop for end-position tuning; it does not lock or hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 Is Used
Machine Changeover
Quickly reconfigure end-stops for varying product sizes on a packaging line without disassembling the pneumatic setup or replacing the cylinder.
Commissioning Calibration
Fine-tune the final 205-225 mm travel window during initial machine setup to achieve exact positioning and avoid mechanical interference.
Variable End Stops
Adjust the retract position on the fly for automated assembly equipment that processes multiple part families with differing heights.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 the Right Cylinder?
Select this adjustable model when your application requires fine end-position tuning during commissioning or frequent product-size changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your process demands higher clamping power, stepping up to the 63 mm bore yields 1559 N of push force at 0.5 MPa, while dropping down to a 40 mm bore reduces thrust to 628 N.
For drop-in compatibility, match the 50 mm bore, 225 mm stroke, 20 mm adjustment range, PT port thread, and standard mounting interface. The SAIJ series supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. Because the nominal stroke of 225 mm is below the 300 mm threshold, external side-load guides are less critical here, though the 20 mm rod diameter still handles moderate bending stress well.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX225-20 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the 225 mm nominal stroke down to a minimum of 205 mm. This creates a 20 mm tuning window for precise end-position calibration without swapping the cylinder.
At a standard 0.5 MPa operating pressure, the SAIJ50X225-20 provides 982 N of push force and 825 N of pull force. At its maximum 1.0 MPa pressure, the push force reaches 1767 N.
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Covers non-human-caused product damage.
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