Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50
The AirTAC SAIJ80X275-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 2513N of push force at 0.5 MPa and uses a 25mm carbon steel rod with an M20x1.5 thread. By turning the rear stopper screw, you can trim the effective travel, creating a precise 225-275mm usable window for commissioning without swapping hardware.
This extruded aluminum barrel design includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear adjuster acts purely as a mechanical travel stop to fine-tune the end position; it is not a lock, so the cylinder cannot hold a load without live air pressure. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 275 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 SAIJ80X275-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×275 | 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 SAIJ80X275-50 Is Used
Product Changeovers
Dial the end position back by up to 50mm to accommodate varying package sizes on a conveyor without changing the cylinder.
Machine Setup
Fine-tune the retract stroke during commissioning to achieve exact clamping or pressing forces without adding external stoppers.
Variable End Stops
Use the 225-275mm travel window to adjust the working stroke on automated machinery for different batch requirements.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80X275-50 the Right Cylinder?
Choose this 80mm bore when an application requires higher thrust than the 50mm option (982N at 0.5 MPa) but less than the 100mm bore (3927N). The 50mm adjustment range is ideal for product-size changeovers on a line, allowing you to dial in the exact end-stop on the fly instead of machining external stops or buying a fixed-stroke SAI cylinder. For load-holding without live pressure, select a SAIL or BSAI series instead of relying on this stopper.
When specifying an ISO 15552 replacement, match the 80mm bore, 275mm nominal stroke, 50mm adjustment, PT tapered G3/8 port, and the reduced mounting footprint. Because the stroke is 275mm, the 25mm rod and M20x1.5 thread provide rigidity, but an external guide is recommended to prevent side-loading wear over long unsupported travel.
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 SAIJ80X275-50 FAQ
At 0.5 MPa it provides 2513N push and 2268N pull force, reaching up to 4523N push at 0.9 MPa. The standard speed range for this 80mm bore is 30-800 mm/s.
A rear stopper screw lets you mechanically shorten the 275mm nominal stroke by up to 50mm, giving a usable travel window of 225-275mm. This stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
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