Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-40S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-40S 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 SAIJ80AX650-40S
The AirTAC SAIJ80X650-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 3518N push force at 0.7 MPa, utilizing a 25mm piston rod and G3/8 ports. The integrated -40 adjustment code allows you to trim the 650mm nominal stroke back by up to 40mm, creating a precise 610-650mm usable travel window for fine-tuning end positions during commissioning.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-40S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-40S |
|---|---|
| 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 SAIJ80AX650-40S
| 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 SAIJ80AX650-40S Is Used
Machine Changeover
Dial in the 610-650mm travel window during product size transitions to set new end positions without physically replacing the cylinder.
Variable End Stops
Provide adjustable physical stops for diverter arms or pushing mechanisms where the exact retraction point needs on-site tweaking.
Assembly Line Setup
Fine-tune the retraction depth of tooling plates during initial commissioning to ensure precise alignment without external stopper blocks.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX650-40S the Right Cylinder?
Select this 80mm bore when an application requires higher thrust than a 63mm cylinder (which provides 2182N push at 0.7 MPa), but without the bulk of a 100mm unit (5497N). The adjustable 610-650mm window is ideal for product-size changeovers on a line, allowing you to reposition the end stop without swapping the cylinder or adding external stops. For a fixed end position, the standard SAI series is sufficient, but SAIJ provides vital flexibility during machine setup.
Because this model features a 650mm stroke, the extended 25mm rod and M20x1.5 thread can handle significant side loads, but an external guide is still recommended to prevent binding over such a long travel distance. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air; for dead-load holding, consider the SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 80mm bore, 650mm stroke, PT tapered ports, and desired mounting bracket.
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 SAIJ80AX650-40S FAQ
At 0.7 MPa operating pressure, this 80mm bore cylinder provides a push force of 3518N and a pull force of 2268N. It can reach a maximum push force of 4523N at 0.9 MPa.
The rear adjuster allows you to shorten the 650mm nominal stroke by up to 40mm, providing a usable travel window of 610-650mm. The adjuster acts as a mechanical stop to fine-tune the end position and does not function as a lock to hold the load without air pressure.
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