Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40S 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 SAIJ80X240-40S
The AirTAC SAIJ80X240-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 240 mm stroke that can be dialed back by up to 40 mm, creating a precise 200-240 mm usable travel window for product size changeovers. Operating at 0.5 MPa, it generates 2513 N of push force and 2268 N of pull force, making it suited for heavy positioning tasks.
This unit includes a magnet for position sensing via CMSE reed or DMSE solid-state switches. It features a 25 mm carbon steel rod with an M20x1.5 thread, providing robust resistance to side loads, though long unsupported strokes still benefit from an external guide. The extruded aluminum barrel integrates sensor grooves on both sides, and the rear stopper functions purely as an end-position deceleration device, not a lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40S |
|---|---|
| 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 SAIJ80X240-40S
| 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 SAIJ80X240-40S Is Used
Machine Changeover
Dial in the 200-240 mm travel window during product size transitions to set new end stops rapidly without changing cylinder hardware.
Press Positioning
Leverage the 2513 N push force at 0.5 MPa to seat heavy components, using the rear screw to fine-tune the final contact depth.
Assembly Line Stops
Adjust the stroke by up to 40 mm on the fly to accommodate varying pallet widths while maintaining standard ISO 15552 mounting dimensions.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X240-40S the Right Cylinder?
Selecting this 80 mm bore over a 63 mm version steps the thrust up from 1559 N to 2513 N at 0.5 MPa, providing extra force for higher resistance loads. The 40 mm adjustment range is chosen when a machine requires frequent end-position tuning at commissioning without swapping out the entire cylinder or adding bulky external stops. Because the stroke is 240 mm, external guide rails should be used to prevent rod side-loading and premature seal wear.
To replace an ISO 15552 cylinder on existing equipment, match the 80 mm bore, 240 mm stroke, 40 mm adjustment, PT tapered port thread, and the -S magnet option. The compatible mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Remember that the rear adjuster and air cushions only set the travel end; for load-holding without live air pressure, use an external rod lock, pilot-operated check valve, or the AirTAC SAIL or BSAI series.
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 SAIJ80X240-40S FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, the push force reaches 4523 N.
The rear adjuster acts as an external stop that lets you shorten the effective travel from the 240 mm nominal stroke down to 200 mm. It sets the end position and deceleration but does not hold the load without live air pressure.
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