Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-20 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 SAIJ50AX275-20
The AirTAC SAIJ50X275-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 255-275 mm usable travel window by allowing you to dial back the 275 mm nominal stroke by up to 20 mm without adding external stops. Operating at 0.5 MPa, it generates 982 N of push force and 825 N of pull force.
This variant is configured with a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. The rear adjuster acts purely as a mechanical stop for end-position tuning; it does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-20 |
|---|---|
| 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 SAIJ50AX275-20
| 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 SAIJ50AX275-20 Is Used
Machine Changeover
Fine-tune the 255-275 mm retract position during product size changes without physically replacing the cylinder or bolting on external stoppers.
End-Position Tuning
Dial in the exact end-of-stroke location at commissioning to compensate for mechanical tolerances in your fixture or tooling.
Variable Stops
Adjust the travel window dynamically on packaging or conveying lines where the final reject or divert position needs occasional tweaks.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-20 the Right Cylinder?
Choose this 50 mm bore when you need the 982 N 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 stroke is ideal for machine setup and product changeovers, letting you fine-tune the retract end on the fly instead of swapping a fixed-stroke SAI cylinder. Because the stroke is 275 mm, ensure proper external guiding to prevent excessive side loads on the 20 mm rod. For applications requiring true load-holding without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock. To match this ISO 15552 replacement exactly, specify the 50 mm bore, 275 mm stroke, 20 mm adjustment, PT ports, and no 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 SAIJ50AX275-20 FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjuster screw lets you shorten the 275 mm nominal stroke by up to 20 mm, creating a 255-275 mm usable travel window. It acts as a mechanical stop for fine-tuning and is not a locking mechanism.
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