Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-100
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-100 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 SAIJ80AX250-100
The AirTAC SAIJ80X250-100 is a double-acting ISO 15552 profile cylinder featuring a substantial 100mm rear stroke adjuster. This configuration provides a usable travel window of 150 to 250mm, allowing you to dial back the effective stroke precisely during commissioning without swapping out the cylinder or adding external stops. It delivers a robust 2513N push force at 0.5MPa and 4523N at 0.9MPa, making it well-suited for heavy-duty positioning tasks.
This variant is equipped with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE electronic switches. Remember that the rear adjuster acts strictly as a travel stop and works alongside the adjustable air cushions to decelerate the load; it does not lock or hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-100 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-100 |
|---|---|
| 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 SAIJ80AX250-100
| 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 SAIJ80AX250-100 Is Used
Product Changeovers
Dial in the retract position from 250mm down to 150mm instantly when switching between product sizes on the line, eliminating the need to physically swap cylinders or reposition hard stops.
End-Position Tuning
Fine-tune the exact end-of-stroke location during machine commissioning to achieve perfect mechanical alignment, absorbing minor variances in fixture placement up to 100mm.
Heavy-Duty Forming
Leverage the 2513N push force at 0.5MPa for pressing or forming operations, using the rear adjuster to precisely control the maximum travel distance and prevent over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX250-100 the Right Cylinder?
Choose this 80mm bore cylinder when your application requires high thrust forces up to 2513N at 0.5MPa, stepping up from the 50mm bore class which provides 982N. The 100mm adjustment range is ideal for machinery that undergoes frequent product changeovers, as it allows the retract end-position to be fine-tuned on the fly. If your process absolutely requires holding a load in place without continuous live air, this standard SAIJ is not a locking cylinder; you should instead consider the AirTAC SAIL or BSAI clamp-lock series.
To replace an ISO 15552 cylinder, match the 80mm bore, 250mm nominal stroke, 100mm adjustment range, G3/8 PT ports, and the required mounting bracket. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the 250mm stroke is under the 300mm threshold, side-load risks are moderate, but the 25mm rod diameter handles lateral stress better than smaller bores; always ensure external guidance for heavy 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 SAIJ80AX250-100 FAQ
The rear adjuster screw acts as an external mechanical stop that limits the piston's retraction. For this model, it allows you to shorten the effective stroke by up to 100mm, creating a usable travel window between 150mm and 250mm without replacing the cylinder.
At a standard operating pressure of 0.5 MPa, this 80mm bore cylinder provides a push force of 2513N and a pull force of 2268N. If you increase the pressure to 0.9 MPa, the push force reaches 4523N.
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