Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 80mm 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
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S
The AirTAC SAIJ80X80-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 80 mm travel by up to 40 mm, creating a highly flexible 40 to 80 mm usable window. This on-the-fly tuning eliminates the need to swap cylinders or bolt on external stops during machine commissioning. Delivering a robust 2513 N push force at 0.5 MPa, it handles heavy actuation with ease.
Built for durability and precise positioning, this variant features a SUS304 stainless steel rod (code B) for superior corrosion resistance and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) supports direct mounting of AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a travel stop and works alongside the standard air cushions to decelerate the load, but it does not hold the position without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 80 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 SAIJ80BX80-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×80 | 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 SAIJ80BX80-40S Is Used
Machine Changeover
Dial in the exact end-stop position between 40 and 80 mm during product size changes without swapping out the physical cylinder.
Heavy Positioning
Leverage the 2513 N push force at 0.5 MPa to move heavy jigs into place while fine-tuning the final resting position at commissioning.
Washdown Assembly
Rely on the SUS304 stainless steel rod and robust profile design for durable performance in manufacturing environments requiring frequent washdowns.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40S the Right Cylinder?
Choose this 80 mm bore when your application requires higher force than a 63 mm cylinder (which provides 1402 N pull at 0.5 MPa) but you want to avoid the bulk of a 100 mm unit. The adjustable 40-80 mm stroke is ideal for product changeovers where the end-stop position varies between setups, saving the downtime of physically replacing a fixed-stroke SAI cylinder. For any load-holding requirements without continuous compressed air, this standard SAIJ adjuster will not act as a lock; you should instead select an AirTAC SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match these exact specifications: 80 mm bore, 80 mm nominal stroke, 40 mm adjustment range, PT port threads, and the -S magnet option. The SAIJ utilizes a reduced mounting accessory set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the 25 mm rod diameter and M20x1.5 rod thread provide excellent structural rigidity, this cylinder handles moderate side loads well, though long unsupported strokes still require external guide rails.
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 SAIJ80BX80-40S FAQ
At 0.5 MPa it provides 2513 N push force and 2268 N pull force. The operating speed range is 30-800 mm/s, supported by adjustable air cushions at both ends.
A rear external screw acts as a stopper, allowing you to shorten the effective travel from the nominal 80 mm down to as little as 40 mm. This stopper only sets the end position and does not lock the load without live air pressure.
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