Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-50
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-50 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 SAIJ50AX275-50
The AirTAC SAIJ50X275-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the travel by up to 50 mm. This yields a usable end-position window of 225 to 275 mm, letting you fine-tune the retract distance at commissioning without swapping hardware. It delivers 982 N of push thrust at 0.5 MPa, making it well-suited for moderate-force positioning tasks.
Built with a SUS420J2 stainless steel rod and PT tapered port threads, this unit resists corrosion and ensures a tight pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some fixed-stroke variants.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-50 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-50 |
|---|---|
| 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 SAIJ50AX275-50
| 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 SAIJ50AX275-50 Is Used
Machine Changeover
Dial in the exact retract distance from 225 to 275 mm during product size transitions without machining new external stop blocks.
End-Position Tuning
Fine-tune the final retract position during commissioning to perfect a 982 N assembly press fit at 0.5 MPa.
Variable End Stops
Use the built-in 50 mm travel window to adapt a single actuator setup to multiple fixture lengths on the fly.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-50 the Right Cylinder?
Choose this 50 mm bore when an application requires 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore (628 N) for more clamping authority, or down from a 63 mm bore (1559 N) to save space. The 50 mm adjustment range is ideal for product-size changeovers on a line, acting as an external stop built into the cylinder. Because the stroke is 275 mm, an external guide is recommended to prevent side-loading damage to the rod over long unsupported travels.
For load-holding requirements, remember that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its position without live air pressure. For true fail-safe holding, consider an AirTAC SAIL or BSAI cylinder instead. To replace an ISO 15552 unit, match the 50 mm bore, 275 mm stroke, 50 mm adjustment, PT G1/4 ports, and the desired mounting bracket.
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 SAIJ50AX275-50 FAQ
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective travel by up to 50 mm. This creates a usable stroke window of 225 to 275 mm. The adjuster only sets the travel end; it does not lock the load without live air pressure.
At an operating pressure of 0.5 MPa, the SAIJ50X275-50 provides 982 N of push thrust and 825 N of pull thrust. It can reach up to 1767 N of push force at 0.9 MPa.
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Covers non-human-caused product damage.
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