Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 120mm 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
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S
The AirTAC SAIJ80X120-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 20 mm. This yields a precise 100-120 mm usable window, enabling fine end-position tuning at commissioning without swapping the barrel or adding external stops. It delivers 2513 N of push force at 0.5 MPa and 4523 N at 0.9 MPa.
This unit includes a standard magnet for CMSE reed and DMSE solid-state sensors, which seat neatly into the dual-side extruded aluminum barrel grooves. The M20x1.5 rod thread and 25 mm carbon steel piston rod handle high side loads well, while the PT tapered port threads ensure a positive pneumatic seal on the G3/8 air supply.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 120 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 SAIJ80X120-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×120 | 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 SAIJ80X120-20S Is Used
Machine Changeover
Dial in the 100-120 mm travel window during product size transitions to hit exact retract positions without machining new hard stops.
Assembly Pressing
Leverage the 4523 N force at 0.9 MPa for pressing tasks, using the rear screw to fine-tune the final approach depth accurately.
End-Stop Calibration
Eliminate external stopper bolts on the machine frame by using the built-in 20 mm adjustment range to set the exact retraction point.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X120-20S the Right Cylinder?
Choose this 80 mm bore when an application demands more thrust than a 63 mm cylinder (which provides 1559 N at 0.5 MPa) but does not require the 3927 N push force of a 100 mm bore. The adjustable stroke is ideal for machine setups requiring variable end-stops during product changeovers, replacing the need for fixed-stroke SAI cylinders when exact positioning is not yet finalized.
Remember that the rear adjuster acts purely as a mechanical stop and does not hold the load without live air pressure; for true load-holding, select an SAIL or BSAI series. Mounting options are restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 120 mm stroke is under 300 mm, external guide requirements are minimal.
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 SAIJ80X120-20S FAQ
The rear adjuster screw lets you shorten the 120 mm nominal stroke by up to 20 mm, creating a 100-120 mm usable travel window. It acts as a mechanical stop to fine-tune the retract position and works alongside the standard air cushions, but it does not lock the load without live air.
At 0.5 MPa it provides 2513 N of push force and 2268 N of pull force. At 0.9 MPa, the push force increases to 4523 N.
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