Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S
The AirTAC SAIJ50X280-30-S is a double-acting ISO 15552 profile cylinder with a single rod and a rear stroke adjuster. It provides a 982N push force at 0.5 MPa and features a 250-280mm adjustable travel window, allowing you to trim the nominal 280mm stroke by up to 30mm. The extruded aluminum barrel includes sensor grooves on both sides for straightforward detection integration.
This specific SKU is configured with an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and PT tapered port threads. The integrated magnet (-S) works directly with AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts as a travel stop to fine-tune end positions at commissioning, but it does not lock or hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 280 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 SAIJ50AX280-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×280 | 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 SAIJ50AX280-30S Is Used
Product Changeovers
Dial in the 250-280mm travel window during format changes on a packaging line without swapping out the entire actuator.
Machine Setup
Fine-tune the retract end position at commissioning using the rear screw stopper rather than adding external shims.
Variable End Stops
Adjust the effective stroke on the fly for assembly tools that need precise end-of-travel tuning for different part heights.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX280-30S the Right Cylinder?
Choose this 50mm bore when you need 982N of push force at 0.5 MPa, stepping up from a 40mm bore that provides 628N, or down from a 63mm bore yielding 1559N. An adjustable stroke is ideal for machine changeovers where the exact end-of-travel position varies slightly between product sizes, eliminating the need to physically swap cylinders or bolt on external stops. For load-holding without continuous air pressure, this cylinder is not a lock; you should look at the SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 50mm bore, 280mm stroke, 30mm adjustment range, G1/4 port, and the -S magnet requirement. Because the stroke is 280mm, the 16mm rod diameter and M12x1.25 thread carry moderate side loads; however, for any stroke of 300mm or more, an external guide is recommended to prevent rod wear. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ50AX280-30S FAQ
At a 0.5 MPa operating pressure, this 50mm bore cylinder provides a push force of 982N and a pull force of 825N. At 0.7 MPa, the push force increases to 1374N.
The rear adjuster screw lets you shorten the effective travel from the nominal 280mm down to 250mm, creating a 250-280mm usable window. This stopper only sets the travel end and does not hold the load without live air.
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