Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40
The AirTAC SAIJ125X80-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 40-80 mm usable travel window from its 80 mm nominal stroke. Delivering 6136 N of push force at 0.5 MPa, it fits seamlessly into dimensionally interchangeable ISO 15552 mounting interfaces. The extruded aluminum barrel includes sensor grooves on both sides for flexible positioning.
This model uses a PT tapered port and a 32 mm carbon steel rod with an M27x2 thread, providing a robust interface for high-force operations. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning without needing external stops. It is important to note that this adjuster is not a lock; it will not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125 Adjustable Cylinder SAIJ125X80-40 Is Used
Variable End-Stop Machining
Dial the retract stroke back by up to 40 mm to accommodate varying material lengths on a single fixture without physically replacing the cylinder.
Product Changeover Diverter
Quickly reconfigure a diverter arm's reach on a packaging conveyor during a format change, using the rear screw to set the exact 40-80 mm travel needed.
High-Force Clamp Setup
Fine-tune the clamping end-position during machine setup, leveraging the 6136 N push force at 0.5 MPa while avoiding over-travel on delicate components.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40 the Right Cylinder?
Choose this 125 mm bore when a smaller 100 mm bore (providing 3927 N at 0.5 MPa) lacks the necessary thrust, but a larger 160 mm bore is oversized. The 40 mm adjustment range is ideal for product-size changeovers on a line, allowing you to dial in the exact end-stop without swapping the cylinder for a fixed-stroke SAI. If your application requires true load-holding without continuous air pressure, consider the SAIL or BSAI series instead, as the SAIJ adjuster only restricts travel. The correct mounting set for this profile cylinder includes Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125 Adjustable Cylinder SAIJ125X80-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 8590 N of push force at 0.7 MPa.
The rear mechanical stopper lets you shorten the effective travel from the 80 mm nominal stroke down to as little as 40 mm. This allows precise end-position tuning at commissioning without changing the cylinder or adding external stops.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.