Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50S
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50S 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 SAIJ80BX650-50S
The AirTAC SAIJ80X650-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 4523N push force at 0.9 MPa and provides a usable travel window of 600 to 650mm, letting you dial in the exact retract position without swapping out the unit. This model includes a SUS304 stainless steel rod for superior corrosion resistance and is equipped with a magnet for CMSE and DMSE sensors.
Because the nominal stroke is 650mm, an external guide is highly recommended to prevent excessive side-loading on the rod. The rear adjustment screw acts as a hard stop to fine-tune the end position during commissioning, but it does not lock the load without live air pressure. For load-holding requirements without continuous pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50S Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50S |
|---|---|
| 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 SAIJ80BX650-50S
| 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 SAIJ80BX650-50S Is Used
Variable End-Stop Forming
Dial in the 600-650mm retract position during setup to accommodate different material thicknesses without re-engineering the press fixture.
Product Changeover Diverter
Adjust the stroke by up to 50mm on the fly to handle varying package sizes on a packaging line, ensuring precise routing without swapping cylinders.
Long-Travel Machine Setup
Fine-tune the end position on a 650mm stroke automation sequence during commissioning to compensate for mechanical tolerances in the frame.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX650-50S the Right Cylinder?
Choose this 80mm bore cylinder when you need heavy thrust beyond the 2805N push force of a 63mm bore, but want to avoid the larger footprint and 7068N force of a 100mm unit. The 50mm adjustment range is ideal for product changeovers on a line where the exact end position varies by up to 50mm, eliminating the need to fabricate external stops or buy multiple fixed-stroke SAI cylinders.
This configuration uses PT tapered ports and a SUS304 stainless steel rod. It supports the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). To match this ISO 15552 interchangeable cylinder exactly, specify an 80mm bore, 650mm stroke, 50mm adjustment, PT ports, and a -S magnet.
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 SAIJ80BX650-50S FAQ
At a 0.9 MPa operating pressure, this 80mm bore cylinder generates a push force of 4523N and a pull force of 4054N. The maximum allowable operating pressure is 1.0 MPa.
The rear adjuster allows you to shorten the effective travel from the nominal 650mm down to 600mm. It functions as a mechanical stop for end-position tuning at commissioning, but it is not a lock and requires live air to hold the load.
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