Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 275mm 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
- Stroke275 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 SAIJ50AX275-40S
The AirTAC SAIJ50X275-40-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 982N of push force and 825N of pull force at 0.5 MPa, equipped with a 20mm rod and M16x1.5 thread. The built-in magnet enables position detection with CMSE reed and DMSE electronic sensors.
This specific SKU provides a 275mm nominal stroke that can be dialed back by up to 40mm, creating a precise 235-275mm usable travel window. The rod is constructed from SUS420J2 stainless steel for enhanced corrosion resistance, and it uses PT tapered port threads. The adjuster acts purely as a mechanical stop to fine-tune the retract end position without requiring external stopper blocks.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 275 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 SAIJ50AX275-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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 SAIJ50AX275-40S Is Used
Machine Changeover
Quickly adapt the retract end-stop for different product lengths on a packaging line without swapping out the entire cylinder assembly.
Commissioning Calibration
Dial in the exact 235-275mm travel distance during initial setup to perfect tooling alignment and prevent over-travel damage.
Variable End Positioning
Fine-tune the stroke end-point on the fly to accommodate varying material thicknesses or feeding requirements in automated machinery.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-40S the Right Cylinder?
Choose this 50mm bore when your application requires around 982N of push force at 0.5 MPa, sitting neatly between the 40mm bore (628N) and the 63mm bore (1559N). An adjustable-stroke cylinder is selected over a fixed-stroke SAI when you need to fine-tune the end position during commissioning or adapt to product size changeovers on the same line. For strokes of 275mm or longer, an external guide is recommended to prevent excessive side-load wear on the 20mm rod.
This cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. Note that the rear adjuster and air cushions only set the travel end; they do not hold the load without live air. For true load-holding, consider the SAIL or BSAI series. Configuration: 50mm bore, 275mm stroke, 40mm adjustment, PT port, -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 SAIJ50AX275-40S FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 40mm. This gives the 275mm nominal stroke a usable travel window of 235-275mm, which can be fine-tuned during commissioning without adding external stops.
At a standard 0.5 MPa operating pressure, the SAIJ50X275-40-S provides 982N of push force and 825N of pull force. It can reach up to 1767N of push force at 0.9 MPa.
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