Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 50mm 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
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20
The AirTAC SAIJ80X50-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 50 mm nominal travel by up to 20 mm. This creates a 30-50 mm usable travel window, enabling precise end-position tuning at commissioning without swapping the cylinder or adding external stops. In this B-rod configuration, the piston rod is made of SUS304 stainless steel for superior corrosion resistance.
Belonging to the 80 mm bore class, it provides 2513 N of push force and 2268 N of pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches. It uses a G3/8 port and offers variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 50 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 SAIJ80BX50-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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 SAIJ80BX50-20 Is Used
Machine Changeover
Fine-tune the 30-50 mm travel window during product size transitions on a packaging line without replacing the cylinder.
Variable End-Stops
Dial in the exact retract position for sensors or tooling interfaces, using the rear stopper instead of external shims.
Stainless Rod Tooling
Leverage the SUS304 rod material for precise clamping or positioning in environments requiring corrosion resistance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX50-20 the Right Cylinder?
Choose this 80 mm bore adjustable-stroke cylinder when your machine setup requires variable end-stops or frequent product-size changeovers, unlike a fixed-stroke SAI model. If your application needs less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa. Remember that the rear adjuster acts as a travel stop and the air cushion only manages deceleration; neither will hold a load without live air pressure. For load-holding without continuous air supply, consider the SAIL or BSAI series.
To replace an ISO 15552 cylinder, match these exact attributes: 80 mm bore, 50 mm stroke, 20 mm adjustment range, G3/8 PT tapered port, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mountings. Since the rod thread is M20x1.5, ensure your mechanical linkage handles the corresponding side-load limits.
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 SAIJ80BX50-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw lets you mechanically shorten the 50 mm nominal stroke by up to 20 mm, providing a 30-50 mm usable travel window. The adjuster acts as a hard stop at the retract end and does not lock the load without live air pressure.
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