Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S
The AirTAC SAIJ80X250-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end position. With a nominal 250 mm stroke and a 30 mm adjustment range, it provides a usable travel window of 220 to 250 mm. This enables precise end-stop tuning at commissioning without swapping the cylinder or adding external stops. It delivers a robust 4523 N push force at 0.9 MPa.
Built with an SUS420J2 stainless steel rod, this variant handles side loads better than standard carbon steel while resisting corrosion. The integrated magnet (-S) supports position sensing with AirTAC CMSE reed and DMSE electronic switches fitted into the dual-side sensor grooves. The rear adjuster acts purely as a travel stop for deceleration and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 250 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 SAIJ80AX250-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | 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 SAIJ80AX250-30S Is Used
Machine Changeover
Dial in the 220-250 mm stroke window during product size changes on a packaging line without physically replacing the cylinder or bolting on new external stops.
End-Stop Calibration
Fine-tune the retract position during initial commissioning to perfect a pressing or clamping operation, absorbing mechanical tolerances directly at the rear stopper.
Variable Positioning
Adjust the travel end on a sorting diverter to handle different carton sizes on the fly, using the 30 mm adjustment range to alter the actuation distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30S the Right Cylinder?
Select this 80 mm bore when an application requires 4523 N of push force at 0.9 MPa, but demands on-site travel adjustments within a 220-250 mm window. If you need less force, stepping down to a 63 mm bore yields 2805 N at 0.9 MPa. For heavier loads, a 100 mm bore provides 7068 N. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, whereas a fixed SAI cylinder is preferred for set-repeat operations.
Because the 250 mm stroke is 300 mm or under, side-load risks are moderate, though an external guide is still recommended for heavy lateral loads. Remember that the SAIJ rear adjuster is a stop, not a lock; for load-holding without live pressure, consider an AirTAC SAIL or BSAI cylinder. This unit uses PT tapered ports and supports the SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ80AX250-30S FAQ
This 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force at 0.5 MPa. At 0.9 MPa, the push force increases to 4523 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 250 mm down to 220 mm. It sets the travel end and deceleration point but does not lock the load without continuous air pressure.
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