Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30
The AirTAC SAIJ80 Adjustable Cylinder SAIJ80BX280-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ80 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30
The AirTAC SAIJ80X280-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you fine-tune the travel window from 250 to 280 mm without adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE solid-state switches, though this specific SKU is supplied without a magnet.
This model features a SUS304 stainless steel rod for superior corrosion resistance and uses a PT tapered port thread. The 25 mm rod and M20x1.5 thread provide excellent rigidity, but with a 280 mm stroke, maintaining alignment is critical to prevent excessive side-loading. The rear adjuster acts purely as a mechanical stop to set the end position and relies on the variable air cushions at both ends for deceleration; it does not lock or hold the load without live air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 280 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 | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | — |
| Max (@1.0 MPa) | 463 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×280 | 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 SAIJ80BX280-30 Is Used
Variable End-Stop Tuning
Dial in the exact 250 to 280 mm travel distance during commissioning to accommodate varying material thicknesses without swapping out the entire cylinder.
Product Changeover
Quickly readjust the retract end-position on a packaging line when switching to a different carton size, using the rear screw to fine-tune the stroke on the fly.
Machine Setup Calibration
Eliminate mechanical hard stops and simplify assembly by using the built-in stroke adjustment to perfectly time the cylinder's endpoint with the machine cycle.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX280-30 the Right Cylinder?
The 30 mm adjustment range is ideal for machine setups requiring variable end-stops or product changeovers, offering a clear advantage over a fixed-stroke SAI cylinder. Because the stroke reaches 280 mm, you should use an external guide to support the load and prevent side-loading damage. For any ISO 15552 replacement, match the 80 mm bore, 280 mm stroke, 30 mm adjust, PT G3/8 port, and your required mounting accessory from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). If your application requires position holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
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 SAIJ80BX280-30 FAQ
At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf.
The rear adjuster screw allows you to shorten the nominal 280 mm stroke by up to 30 mm, creating a usable travel window between 250 and 280 mm. The adjuster acts as a mechanical stop and does not function as a lock or brake to hold the load without continuous air pressure.
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