Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 270mm 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
- Stroke270 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 SAIJ50AX270-40S
The AirTAC SAIJ50X270-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 270 mm stroke that can be fine-tuned down by up to 40 mm, giving you a precise 230-270 mm usable travel window during commissioning. Delivering 982 N of push force at 0.5 MPa, it bridges the gap between smaller 40 mm bores and heavier 63 mm units.
This variant features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and carries an internal magnet (-S) for position detection. The extruded aluminum barrel includes sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses PT tapered ports and offers adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 270 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 SAIJ50AX270-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×270 | 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 SAIJ50AX270-40S Is Used
Product Changeovers
Dial in the 230-270 mm travel window during format size changes on packaging lines without physically replacing the actuator.
Adjustable Diverters
Fine-tune the retract position of sorting gates on a conveyor to accommodate varying package lengths at commissioning.
Machine Setup
Set precise end-stops for secondary machining operations, relying on the 982 N thrust to feed materials accurately.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-40S the Right Cylinder?
Select this 50 mm bore when an application requires moderate thrust, such as the 982 N push or 825 N pull force at 0.5 MPa, but does not need the full 1559 N capacity of a 63 mm cylinder. The adjustable 230-270 mm window is ideal for product changeovers on a line, allowing you to dial in the exact retract end-position without swapping the cylinder or adding external stops. Because the stroke is 270 mm, ensure adequate external guiding to prevent excessive side-loading on the rod.
For a direct ISO 15552 replacement, match the 50 mm bore, 270 mm stroke, 40 mm adjustment, PT port thread, and -S magnet. Remember that the rear adjuster acts only as a travel stop and the air cushions handle deceleration; neither will hold a load without live air pressure. For true load-holding, consider the SAIL or BSAI series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ50AX270-40S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it achieves up to 200 kgf.
The rear adjuster screw allows you to shorten the 270 mm nominal stroke by up to 40 mm, creating a 230-270 mm usable travel window. The adjuster is a mechanical stop, not a lock, so the cylinder still requires live air to maintain position.
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