Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-20 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 SAIJ80X135-20
The AirTAC SAIJ80X135-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 115 to 135 mm, allowing you to dial back the nominal 135 mm stroke by up to 20 mm during commissioning. This bore size delivers a robust 2513 N push force at 0.5 MPa, making it well-suited for medium-duty handling tasks.
The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed and DMSE electronic switches if a magnet is specified later. The 25 mm carbon steel rod and M20x1.5 thread provide strong resistance to side loads, while the rear stopper functions purely as a travel end adjustment and does not hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-20 |
|---|---|
| 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 SAIJ80X135-20
| 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 SAIJ80X135-20 Is Used
Machine Changeover
Dial in the exact 115 to 135 mm end position during product size transitions without replacing the cylinder or adding external shims.
Assembly End-Stop Tuning
Fine-tune the retract stroke on automated assembly lines to accommodate varying part dimensions and ensure precise placement.
Variable Diverter Stroke
Adjust the effective travel of a sorting or diverting mechanism on the fly to handle different package sizes accurately.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X135-20 the Right Cylinder?
Choose this 80 mm bore when an application requires more thrust than the 50 mm size (which offers 982 N push at 0.5 MPa) but does not need the full 3927 N push of the 100 mm variant. The adjustable stroke is ideal for product changeovers or fine-tuning end positions without swapping cylinders or adding external stops. For holding loads safely without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is only a stop.
This model uses a PT tapered G3/8 port and supports the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It omits the FB, CA, CB, and CR mounts. When matching this for an ISO 15552 replacement, verify the 135 mm stroke, 20 mm adjustment, and no magnet requirement.
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 SAIJ80X135-20 FAQ
The rear adjuster screw allows you to shorten the effective travel from 135 mm down to 115 mm, providing a 20 mm tuning window. It acts as a mechanical stop to set the end position and does not lock the load.
At 0.5 MPa operating pressure, it provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
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