Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30 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 SAIJ80AX250-30
The AirTAC SAIJ80X250-30 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, letting you fine-tune the effective travel window from 220 to 250 mm without adding external stops. It delivers a robust 3518 N push force at 0.7 MPa, making it well-suited for heavy positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This SKU features a SUS420J2 stainless steel rod for enhanced corrosion resistance and uses a PT tapered port thread. The rear adjustment screw acts purely as a mechanical travel stop for end-position tuning, meaning it will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30 |
|---|---|
| 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 SAIJ80AX250-30
| 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 SAIJ80AX250-30 Is Used
Machine Changeover
Dial in the exact 220 to 250 mm end-position during product size changes without swapping out the physical cylinder.
End-Stop Tuning
Use the rear adjuster to precisely set the retract distance for tooling alignment during initial commissioning.
Variable Diverter
Adjust the stroke on a sorting diverter arm to handle varying package sizes on the fly without external hard stops.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-30 the Right Cylinder?
Choose this 80 mm bore when you need higher force than a 63 mm cylinder (which provides 2182 N at 0.7 MPa) but want to avoid the bulk of a 100 mm unit. The adjustable stroke is ideal for product changeovers on a line, letting you dial in the exact end-stop on the fly. When replacing an ISO 15552 cylinder, match the 250 mm stroke, 30 mm adjustment, PT G3/8 port, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounts.
Because the 250 mm stroke is relatively long, the 25 mm rod diameter and M20x1.5 rod thread handle side loads well, but an external guide rail is still recommended for heavy off-center loads to prevent premature wear. The standard speed range is 30-800 mm/s.
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 SAIJ80AX250-30 FAQ
At 0.7 MPa operating pressure, this 80 mm bore cylinder provides 3518 N of push force and 2268 N of pull force. It can reach a maximum push force of 4523 N at 0.9 MPa.
The rear adjuster screw lets you mechanically shorten the 250 mm nominal stroke by up to 30 mm, creating a usable travel window of 220 to 250 mm. It functions as a travel stop for fine-tuning, not as a lock, so it cannot hold a load without continuous air pressure.
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