Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S
The AirTAC SAIJ80X85-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 35-85 mm from its 85 mm nominal stroke. Delivering a push force of 3518 N at 0.7 MPa, it handles robust actuation tasks. The integrated -S magnet allows direct mounting of CMSE reed and DMSE electronic sensors along the dual-side barrel grooves for precise end-position detection.
This variant features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance compared to standard carbon steel. The rear stopper mechanism lets you fine-tune the retract end-position at commissioning without adding external stops. The adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 85 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 SAIJ80AX85-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×85 | 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 SAIJ80AX85-50S Is Used
Machine Changeover
Dial in the 35-85 mm travel window during product size transitions without physically replacing the cylinder or adding mechanical shims.
End-Position Tuning
Fine-tune the retract stroke endpoint at commissioning to perfectly align stops, accommodating slight mechanical variations in the fixture.
Variable Stops
Adjust the effective stroke on packaging or conveying lines to handle different carton sizes using the integrated rear stopper.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50S the Right Cylinder?
Choose this 80 mm bore when you need higher thrust than a 63 mm model (which provides 2182 N push at 0.7 MPa) but want to avoid the larger footprint of a 100 mm cylinder. The 50 mm adjustment range is ideal for product changeovers on a line, allowing you to dial in the exact end-stop variation on the fly instead of swapping to a fixed-stroke SAI cylinder.
When specifying a replacement, match the 80 mm bore, 85 mm stroke, 50 mm adjustment, PT tapered ports, and the -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 25 mm rod and M20x1.5 thread handle high side loads, this cylinder still performs best with an external guide to prevent binding.
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 SAIJ80AX85-50S FAQ
At 0.7 MPa operating pressure, the 80 mm bore provides 3518 N of push force and 2268 N of pull force. It operates at speeds of 30-800 mm/s.
The rear adjuster screw acts as a mechanical stop that trims the effective travel. For this model, you can shorten the 85 mm nominal stroke by up to 50 mm, yielding a usable 35-85 mm window. It functions as a stop, not a lock, and requires live air to hold position.
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