Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-75
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-75 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 SAIJ80BX650-75
The AirTAC SAIJ80X650-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down by up to 75 mm, creating a usable window between 575 and 650 mm. Delivering 2513 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads.
This model omits the FB, CA, CB, and CR mounting styles, retaining only the Basic, FA, LB, TC, FTC, TCM1, and TCM2 set. The rear adjuster acts strictly as a travel stop for end-position tuning and must not be confused with a locking mechanism, as the cylinder cannot hold loads without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-75 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-75 |
|---|---|
| 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 SAIJ80BX650-75
| 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 SAIJ80BX650-75 Is Used
Product Changeover Tuning
Dial in the 575-650 mm travel window during line changeovers to accommodate varying package sizes without adding external hard stops.
Adjustable Diversion Stroke
Fine-tune the pusher end-position on a sorting conveyor to handle different product widths accurately during commissioning.
Long-Stroke Assembly Press
Leverage the 2513 N thrust and 650 mm travel for long reach assembly tasks, using the rear screw to set precise bottoming depth.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-75 the Right Cylinder?
Choose this adjustable-stroke cylinder when your machine setup requires variable end-stops or product changeover flexibility without physically swapping out the entire cylinder body. If your application requires less force, stepping down to a 63 mm bore yields 1559 N at 0.5 MPa; conversely, a 100 mm bore provides 3927 N for heavier loads. For drop-in interchangeability, match the 80 mm bore, 650 mm stroke, PT ports, and the specified mounting set.
Because the 650 mm stroke is relatively long, the 25 mm rod should be guided externally to prevent excessive side-loading and premature seal wear. If your process demands true load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a brake.
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 SAIJ80BX650-75 FAQ
At a 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. It can reach up to 4523 N of push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the nominal 650 mm stroke by up to 75 mm, giving a usable travel range of 575 to 650 mm. This stopper only sets the end position and does not lock the load without air pressure.
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