Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20
The AirTAC SAIJ50X240-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. By dialing the external stopper at the rear, you can trim the effective travel back by up to 20 mm, creating a usable stroke window of 220-240 mm for precise end-position tuning during commissioning.
This 50 mm bore generates 982 N of push thrust and 825 N of pull thrust at 0.5 MPa. It features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of CMSE reed or DMSE electronic solid-state switches if a magnet is specified later.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 240 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 SAIJ50AX240-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×240 | 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 SAIJ50AX240-20 Is Used
Product Changeover
Dial in the 220-240 mm travel window during format changes without physically swapping out the entire cylinder.
Commissioning Calibration
Fine-tune the retract end-position to absorb mechanical tolerances and achieve precise machine setup.
End-Stop Trimming
Use the rear adjusting screw to set exact retraction limits for delicate positioning tasks.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX240-20 the Right Cylinder?
Choose this adjustable-stroke model when a fixed 240 mm SAI cylinder cannot accommodate minor mechanical variances or product changeovers without adding external stops. If you need less force, stepping down to a 40 mm bore yields 628 N push at 0.5 MPa, while an 80 mm bore provides 2513 N for heavier loads. Because the stroke is 240 mm, ensure adequate guidance to prevent excessive side-loading on the 16 mm rod.
The rear adjuster acts strictly as a travel stop to set deceleration and end-position; it does not hold the load without live air pressure. For true fail-safe load holding, select an AirTAC SAIL (pneumatic lock) or BSAI (clamp-lock) cylinder. This SAIJ model shares the exact ISO 15552 mounting interface dimensions, utilizing a reduced accessory set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ50AX240-20 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 1374 N push at 0.7 MPa.
The rear adjuster screw allows you to shorten the nominal 240 mm stroke by up to 20 mm, giving an effective travel window of 220 to 240 mm. It functions as a mechanical stop for end-position tuning, not as a load-holding lock.
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