Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S
The AirTAC SAIJ80X240-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 240 mm travel by up to 50 mm for a precise 190-240 mm usable window. It delivers a robust 2268 N pull force at 0.5 MPa, making it well-suited for heavy positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and because this variant includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for end-of-stroke confirmation.
This model is configured with an SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It uses PT tapered port threads and provides variable air cushioning at both ends to decelerate the load. The rear adjuster acts strictly as a mechanical stop for end-position tuning; it does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 240 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | 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 SAIJ80 Adjustable Cylinder SAIJ80AX240-50S Is Used
Variable End-Stop Tuning
Dial in the exact 190-240 mm travel window during machine setup to accommodate varying product sizes without changing the cylinder.
Heavy Positioning
Leverage the 2268 N pull force to move and position heavy fixtures, using the rear screw to fine-tune the final retract position.
Changeover Automation
Speed up production line changeovers by adjusting the mechanical stopper on the fly, eliminating the downtime required to swap out fixed-stroke cylinders.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX240-50S the Right Cylinder?
Choose this 80 mm bore version when your application requires the 2268 N pull force at 0.5 MPa, stepping up from a 63 mm bore that offers 1402 N, or down from a 100 mm bore providing 3681 N. An adjustable-stroke cylinder is selected over a fixed SAI model when you need on-the-fly end-position tuning during machine commissioning or product changeovers, avoiding the need to physically swap cylinders or bolt on external stops. For any load-holding requirements without continuous air pressure, this cylinder is not a lock—consider the SAIL air-released lock or BSAI clamp-lock series instead. The 240 mm stroke is below the 300 mm side-load threshold, but the 25 mm rod and M20x1.5 thread still provide excellent rigidity for standard loads.
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 SAIJ80 Adjustable Cylinder SAIJ80AX240-50S FAQ
At 0.5 MPa operating pressure, this 80 mm bore double-acting cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm from the nominal 240 mm, creating a 190-240 mm usable travel window. This mechanical stop fine-tunes the retract end position but does not lock the load without live air pressure.
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