Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 650mm 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
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40
The AirTAC SAIJ80X650-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 650mm stroke with an adjustable travel window of 610 to 650mm, allowing you to dial back the retract end-position by up to 40mm during commissioning without adding external stops. In this configuration, the cylinder uses a SUS304 stainless steel piston rod and tapered PT ports.
Delivering a robust 2513N pull force at 0.5 MPa, this 80mm bore profile cylinder integrates variable air cushions at both ends to manage kinetic energy. The rear adjuster acts purely as a travel stop for fine-tuning end positions, meaning it will not hold a load safely without live air pressure; for true load-holding, consider the SAIL or BSAI series.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 650 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 SAIJ80BX650-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×650 | 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 SAIJ80BX650-40 Is Used
Machine Changeover
Dial in the exact retract distance within the 610-650mm window when switching production lines to accommodate different product lengths.
Variable End-Stop
Use the rear adjuster screw to fine-tune where a pusher plate stops along a conveyor without physically swapping out the entire cylinder body.
Assembly Calibration
Precisely set the final end-position during machine commissioning to ensure components are pressed or placed accurately over a long travel distance.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40 the Right Cylinder?
Choose this adjustable SAIJ model over a fixed-stroke SAI when a machine requires product-size changeovers or precise end-position tuning at setup. If your application needs less force, stepping down to a 63mm bore yields 1402N of pull force at 0.5 MPa. This specific unit is built with a SUS304 stainless steel rod, PT tapered ports, and no sensor magnet. When replacing an ISO 15552 cylinder, match the 80mm bore, 650mm stroke, 40mm adjustment, PT port thread, and compatible mounting accessories.
Because the 650mm stroke is relatively long, the 25mm rod diameter should not be relied upon to absorb heavy side loads; always guide the load externally to prevent premature seal wear. Mounting options for the SAIJ series include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants found in some other lines.
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 SAIJ80BX650-40 FAQ
At an operating pressure of 0.5 MPa, this 80mm bore cylinder provides 2513N of pull force and 3518N of push force. It can reach a maximum push force of 4523N at 0.7 MPa.
The rear adjuster allows you to shorten the effective stroke by up to 40mm, creating a usable travel window between 610mm and 650mm. The adjuster functions as a mechanical stop and does not lock the load without continuous air pressure.
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