Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40S 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 SAIJ80BX650-40S
The AirTAC SAIJ80X650-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 2513N push force at 0.5 MPa. It features a SUS304 stainless steel rod and a PT tapered port. By integrating a magnetic piston, it enables precise position detection using AirTAC CMSE reed or DMSE electronic solid-state sensors housed within the dual-side sensor grooves.
This model provides a 610 to 650 mm usable travel window, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. The rear adjuster functions strictly as a travel stop for end-position tuning, meaning it will not hold a load without continuous air pressure. For applications requiring secure load-holding without live air, consider the SAIL pneumatic lock or BSAI clamp-lock variants.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40S |
|---|---|
| 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 SAIJ80BX650-40S
| 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 SAIJ80BX650-40S Is Used
Machine Changeover
Quickly fine-tune the 610-650mm retract end-stop during product size changes without bolting on external stops or replacing the cylinder.
Extended-Reach Forming
Leverage the 2513N push force and SUS304 rod for long-stroke pressing tasks where exact end-position calibration is critical.
Variable Position Diverting
Adjust the stroke window on the fly to handle varying package sizes on a conveyor line, using DMSE sensors for confirmation.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-40S the Right Cylinder?
Choose this 80mm bore when a 50mm cylinder (offering 982N push at 0.5 MPa) lacks the necessary thrust, but before stepping up to a 100mm bore (3927N push). The adjustable 610-650 mm travel window is perfect for product changeovers, letting you fine-tune the retract position without swapping the cylinder or adding external stops. Because the 650mm stroke is substantial, the 25mm rod should be paired with an external guide to prevent excessive side-loading on the piston.
To match this exact configuration for an ISO 15552 replacement, specify an 80mm bore, 650mm stroke, 40mm adjustment, PT ports, and the -S magnet option. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
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 SAIJ80BX650-40S FAQ
At 0.5 MPa operating pressure, this 80mm bore cylinder provides 2513N of push force and 2268N of pull force. It can reach a maximum push force of 4523N at 0.9 MPa.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective travel from the 650mm nominal stroke down to 610mm. It only sets the end position and does not lock the load without live air pressure.
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