Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-30 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 SAIJ50AX275-30
The AirTAC SAIJ50X275-30 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 275 mm stroke that can be fine-tuned backward by up to 30 mm, creating a usable travel window of 245 to 275 mm. Delivering 982 N of push force at 0.5 MPa, it handles mid-range automation loads with precision.
This variant features a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic sensors without extra brackets. The rear stopper sets the retract end position, but remember it acts as a travel stop, not a lock, so live air is required to hold the load.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-30 |
|---|---|
| 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 SAIJ50AX275-30
| 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 SAIJ50AX275-30 Is Used
Commissioning End-Stop Tuning
Dial in the exact retract position within the 245-275 mm window during machine setup without adding external mechanical stops.
Product Size Changeover
Quickly adjust the stroke length on packaging lines to accommodate varying box sizes on the fly.
Mid-Force Positioning
Leverage the 982 N push force to push or lift fixtures into place where a precise end-position stop is critical.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-30 the Right Cylinder?
Choose this 50 mm bore when an application requires around 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) for heavier payloads, or down from a 63 mm bore (1559 N) to save space. The adjustable 245-275 mm travel window is ideal for machine setups requiring end-position tuning during commissioning or product changeover, avoiding the need to swap out a fixed-stroke SAI cylinder. When matching ISO 15552 replacements, verify the 275 mm stroke, 30 mm adjustment range, PT port threads, and the SAIJ mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Because the stroke is 275 mm, an external guide is recommended to prevent excessive side-load wear on the 20 mm rod. If your process needs to hold position without continuous air pressure, the SAIJ adjuster will not suffice; consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
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 SAIJ50AX275-30 FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 30 mm. This gives the 275 mm nominal stroke a usable travel window of 245 to 275 mm, enabling fine-tuning of the end position without changing the cylinder.
At 0.5 MPa operating pressure, the SAIJ50X275-30 provides 982 N of push force and 825 N of pull force. The maximum force is 200 kgf at 1.0 MPa.
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Covers non-human-caused product damage.
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