Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 240mm 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
- Stroke240 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 SAIJ50AX240-20S
The AirTAC SAIJ50X240-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end-of-travel position during commissioning. With a nominal 240 mm stroke and a 20 mm adjustment range, it provides a usable travel window of 220 to 240 mm without needing external stops. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, fitting medium-force applications perfectly.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes a built-in magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and fluid must be filtered to 40 um. It supports a speed range of 30-800 mm/s and uses PT tapered port threading (G1/4) for reliable pneumatic connections.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 240 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 SAIJ50AX240-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 SAIJ50AX240-20S Is Used
Machine Setup Calibration
Dial in the exact 220-240 mm travel window during initial commissioning to perfect end-positioning without adding external mechanical stops.
Product Size Changeover
Quickly adapt the retract end-stop on packaging lines when processing different product sizes, using the rear screw to trim up to 20 mm of stroke.
Conveyor End-Positioning
Fine-tune the pusher stroke on a conveyor sorting system to accommodate varying package lengths without replacing the entire cylinder.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20S the Right Cylinder?
Choose this 50 mm bore when an application requires roughly 982 N of push force at 0.5 MPa, stepping up from the 40 mm bore (628 N) or down from the 63 mm bore (1559 N). An adjustable stroke is selected over a fixed SAI cylinder when you need variable end-stops for product changeovers or precise machine setup without physically swapping the actuator. At 240 mm nominal stroke, the 16 mm rod diameter handles moderate side loads, but long unsupported strokes still require an external guide to prevent binding.
For exact ISO 15552 dimensional interchangeability, match the 50 mm bore, 240 mm nominal stroke, 20 mm adjustment range, PT G1/4 port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, use an SAIL or BSAI cylinder, or an external rod lock.
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 SAIJ50AX240-20S FAQ
At a 0.5 MPa operating pressure, the 50 mm bore provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 240 mm down to 220 mm. This allows precise end-position tuning during setup, but it is a stop, not a lock, and will not hold the load without live air pressure.
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