Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50
The AirTAC SAIJ80X135-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 2513N of push force and 2268N of pull force at 0.5 MPa, making it robust enough for substantial actuation tasks. An extruded aluminum barrel incorporates sensor grooves on both sides for straightforward position detection.
This specific SKU provides a usable travel window of 85 to 135 mm, allowing you to dial back the nominal stroke by up to 50 mm. The carbon steel rod uses an M20x1.5 thread, and air enters via PT G3/8 ports. The rear stopper screw lets you fine-tune end positions at commissioning without physically swapping the cylinder or adding external stops.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 135 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 SAIJ80X135-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×135 | 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 SAIJ80X135-50 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point between 85 and 135 mm during machine setup to accommodate different material thicknesses without changing hardware.
Product Changeover
Quickly adjust the effective stroke by up to 50 mm when switching the production line to a new product size, minimizing downtime.
Assembly Pressing
Leverage the 2513N push force at 0.5 MPa for pressing operations, using the rear stopper to precisely set the pressing depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-50 the Right Cylinder?
Choose this 80mm bore over the 63mm size when you need more thrust, as the 63mm yields only 1559N at 0.5 MPa. Conversely, step up to a 100mm bore if your application requires over 3927N. The SAIJ80X135-50 is ideal when a fixed-stroke SAI cylinder will not accommodate product size variations, giving you a 50mm adjustment window for precise end-stop tuning during machine changeovers.
This cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits the FB, CA, CB, and CR styles. Remember that the rear adjuster acts as a travel stop, not a lock; the cylinder will not hold its load without live air. For true load-holding without pressure, consider the SAIL or BSAI series. Since the 135mm stroke is under 300mm, side-load risks are minimal, but an external guide is still recommended for heavy lateral loads.
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 SAIJ80X135-50 FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can reach up to 4523N push force at 0.9 MPa.
A rear-mounted adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from the nominal 135 mm down to 85 mm. This stopper only sets the travel end and does not lock the load without live air pressure.
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