Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 250mm 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
- Stroke250 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 SAIJ50AX250-50S
The AirTAC SAIJ50X250-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 200 to 250 mm, allowing you to dial back the 250 mm nominal stroke by up to 50 mm during commissioning. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation tasks with precision.
This variant includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and accepts PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches for exact position feedback.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 250 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 SAIJ50AX250-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SAIJ50AX250-50S Is Used
Product Changeover
Quickly adapt the retract end-stop for varying package sizes on a packaging line without changing out the entire actuator assembly.
Commissioning Calibration
Fine-tune the 200-250 mm travel window during machine setup to perfect the seating force of delicate components.
Variable End Stops
Adjust the stroke dynamically on diverter mechanisms where the physical contact point shifts based on product width.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX250-50S the Right Cylinder?
Select this 50 mm bore when an application requires fine-tuning the retract end-position without swapping cylinders or adding external stops. If your process demands less push force, stepping down to a 40 mm bore yields 628 N at 0.5 MPa. Conversely, a 63 mm bore provides 1559 N for heavier loads. Because the nominal stroke is 250 mm, external guiding is recommended to prevent excessive side-loading on the rod.
The rear adjuster acts strictly as a mechanical travel stop to set deceleration, not as a locking device. The cylinder cannot hold a load without live air pressure. For true fail-safe load-holding, consider the SAIL pneumatic lock series, the BSAI clamp-lock, or an external pilot-operated check valve. For ISO 15552 dimensionally interchangeable replacements, match the 50 mm bore, 250 mm stroke, 50 mm adjustment, PT port, and -S magnet.
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 SAIJ50AX250-50S FAQ
At an operating pressure of 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjuster screw allows you to shorten the effective travel from the 250 mm nominal stroke down to 200 mm. This creates a 50 mm adjustable window for setting exact end-positions without replacing the cylinder.
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