Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 35mm 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
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S
The AirTAC SAIJ80X35-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2513N of push force at 0.5 MPa, making it ideal for heavy-duty positioning tasks. By integrating a -S magnet, this unit supports AirTAC CMSE reed and DMSE electronic sensors for precise end-of-stroke detection.
This specific SKU features a 35mm nominal stroke paired with a 20mm adjustment range, yielding a highly versatile 15-35mm usable travel window. The rear screw stopper allows you to fine-tune the retract end position during commissioning without adding external stops. It uses a PT tapered port thread and a 25mm carbon steel rod to handle substantial side loads.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 35 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 SAIJ80X35-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×35 | 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 SAIJ80X35-20S Is Used
Precision Positioning
Dial in the exact 15-35mm retract position during machine commissioning to achieve perfect alignment without swapping cylinders.
Product Changeover
Quickly adjust the end-stop to accommodate different product sizes on an automated line, minimizing downtime between batches.
Heavy-Duty Clamping
Leverage the 2513N push force at 0.5 MPa to secure heavy components, using the adjustable stop to prevent over-travel.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X35-20S the Right Cylinder?
Choose this 80mm bore cylinder when an application requires significant force, stepping up from the 50mm bore (which provides 982N push at 0.5 MPa) to handle heavier fixtures. The adjustable 15-35mm travel window is perfect for machine setups requiring variable end-stops or frequent product-size changeovers. Because the stroke is short (35mm), external side-load guides are less critical here than on longer strokes, though the 25mm rod naturally resists deflection.
When specifying a replacement, ensure you match the 80mm bore, 35mm stroke, 20mm adjustment, PT port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Remember that the rear adjuster is a travel stop, not a lock; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ80X35-20S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can reach a maximum push force of 4523N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that trims the effective stroke. For this SAIJ80X35-20-S model, you can shorten the 35mm nominal stroke by up to 20mm, creating a usable travel window of 15-35mm to fine-tune the end position.
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