Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50 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 SAIJ80AX85-50
The AirTAC SAIJ80X85-50 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 2513N of push force and 2268N of pull force at 0.5 MPa, featuring a 25mm piston rod and G3/8 PT tapered ports. The built-in rear stopper allows you to fine-tune the effective travel down from the 85mm nominal stroke, creating a precise 35-85mm usable window without adding external stops.
This variant features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, and while this specific SKU lacks a magnet, the grooves remain ready for future sensing upgrades. Air cushions at both ends decelerate the piston, but remember the rear adjuster acts only as a travel stop, not a load-holding lock.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50 |
|---|---|
| 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 SAIJ80AX85-50
| 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 SAIJ80AX85-50 Is Used
Changeover Dial-In
Dial in the exact end-stop during product size changeovers by adjusting the rear screw, shifting the travel window anywhere between 35mm and 85mm.
Clamp Positioning
Fine-tune clamping depth on machining lines where the 2513N push force secures heavy parts, using the rear stopper to perfect the final position.
Assembly Station Setup
Set precise retraction points during initial station commissioning without fabricating custom external spacers or swapping out the entire cylinder body.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX85-50 the Right Cylinder?
Choose this 80mm bore SAIJ when an application requires substantial thrust but demands on-the-fly end-position tuning during machine setup or product changeover. If you need less force, stepping down to a 63mm bore drops the 0.5 MPa pull thrust to 1402N. Conversely, moving up to a 100mm bore increases the 0.5 MPa push thrust to 3927N. Because the nominal 85mm stroke is relatively short, side-loading is less of a concern here, but the robust 25mm rod and M20x1.5 thread handle higher bending loads well.
Select an adjustable-stroke SAIJ over a fixed SAI when commissioning requires dialing in the exact end-stop without swapping hardware. To replace this cylinder, match the 80mm bore, 85mm nominal stroke, 50mm adjustment, PT G3/8 port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). If your process needs to hold a load without continuous air pressure, the rear stopper will not suffice; look to the SAIL or BSAI series instead.
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 SAIJ80AX85-50 FAQ
The rear adjusting screw acts as an external stopper that trims the retract end position. For this model, the 85mm nominal stroke can be shortened by up to 50mm, giving an effective adjustable travel window of 35mm to 85mm.
At 0.5 MPa operating pressure, it provides 2513N of push force and 2268N of pull force. At the maximum 1.0 MPa pressure, the push force reaches 4523N.
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