Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 270mm 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
- Stroke270 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 SAIJ50AX270-20S
The AirTAC SAIJ50X270-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a 982N push force at 0.5 MPa and features a 20mm adjustment range, creating a precise 250-270mm usable travel window for commissioning flexibility.
This variant includes an SUS420J2 stainless steel rod (code A) and a built-in magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches. The extruded aluminum barrel incorporates sensor grooves on both sides, and the rear stopper allows you to fine-tune the retract end position without adding external stops.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 270 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 SAIJ50AX270-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×270 | 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 SAIJ50AX270-20S Is Used
Machine Changeover
Dial in the 250-270mm travel window during product size transitions without physically replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke end during commissioning to absorb mechanical tolerance variations and perfectly time the machine sequence.
Variable Package Handling
Adjust the stroke on the fly to push different box sizes to a designated lane while maintaining the 982N push force at 0.5 MPa.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX270-20S the Right Cylinder?
Choose this 50mm bore when an application requires roughly 982N of push force at 0.5 MPa, stepping up from a 40mm bore that provides 628N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, letting you dial in the exact 250-270mm travel without swapping the cylinder for a fixed-stroke SAI.
For drop-in compatibility, match the 50mm bore, 270mm stroke, 20mm adjustment, PT tapered port threads, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 270mm, the 16mm rod needs external guidance to prevent excessive side-loading. The rear adjuster acts only as a travel stop, so for load-holding without live air pressure, select an SAIL or BSAI 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 SAIJ50AX270-20S FAQ
At 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 acts as a mechanical stop that lets you shorten the effective travel from the 270mm nominal stroke down to 250mm. This creates a 250-270mm usable window for fine-tuning the end position at commissioning, but it does not lock the load without live air pressure.
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