Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100 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
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100
The AirTAC SAIJ50X275-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 175 to 275 mm usable travel window. Delivering 982 N of push thrust at 0.5 MPa, it provides substantial force for mid-range automation tasks.
This unit uses a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches if position feedback is later required.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100 |
|---|---|
| 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 SAIJ50AX275-100
| 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 SAIJ50AX275-100 Is Used
Product Changeovers
Quickly reconfigure the 175-275 mm travel window for varying package sizes on a packaging line without replacing hardware.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to perfect the pressing or clamping force without external shims.
Variable Diverters
Adjust the actuator length on the fly to accommodate different product widths moving along a conveyor system.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX275-100 the Right Cylinder?
Choose this 50 mm bore when a 40 mm bore (628 N at 0.5 MPa) is insufficient but an 80 mm bore is too large. The 100 mm adjustment range is ideal for product changeovers, letting you dial in a new end position without swapping the cylinder or adding external stops. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR.
Because the nominal stroke is 275 mm, an external guide is recommended to prevent excessive side loads on the rod. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ will not hold a load without live air, so use a SAIL or BSAI cylinder for fail-safe holding.
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 SAIJ50AX275-100 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push thrust and 825 N of pull thrust. It can reach up to 1767 N of push thrust at 0.9 MPa.
The rear adjuster acts as a stopper that trims the effective travel back from the 275 mm nominal stroke, giving you a 175 to 275 mm usable window. It sets the end position but does not lock the load without continuous air pressure.
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