Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-40 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 SAIJ125AX80-40
The AirTAC SAIJ125X80-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 40 to 80 mm, allowing you to dial back the nominal 80 mm stroke by up to 40 mm. This fine-tuning capability is essential for machine setup and product changeover, eliminating the need to swap the cylinder or bolt on external stops. The bore delivers 6136 N of pull force at 0.5 MPa and reaches 11045 N at 0.9 MPa.
This unit is built with an SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts strictly as a travel stop; it does not hold the load without live air pressure. For load-holding applications, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-40 |
|---|---|
| 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 SAIJ125AX80-40
| 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 SAIJ125AX80-40 Is Used
Variable End-Stops
Quickly dial in the exact retraction point between 40 and 80 mm during machine commissioning to accommodate varying product sizes without changing hardware.
Product Changeover
Adjust the rear stopper on the fly when switching between product runs on a conveyor line, saving downtime and eliminating the need for secondary stop blocks.
Setup Calibration
Fine-tune the end-of-stroke position during initial equipment setup to ensure perfect alignment and positioning before locking down the sequence.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX80-40 the Right Cylinder?
Select this 125 mm bore when your application requires substantial force, offering 6136 N pull at 0.5 MPa, and you need precise end-position tuning without external hardware. If your force requirements are lower, stepping down to a 100 mm bore yields 3681 N pull. The SAIJ125X80-40 uses PT tapered threads and a G1/2 port. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. It is dimensionally interchangeable per ISO 15552. Since this is an 80 mm stroke, side-load is minimal, but always ensure the M27x2 rod thread is properly aligned. For fixed travel without adjustment, use the standard SAI series.
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 SAIJ125AX80-40 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force reaches 11045 N.
The rear adjuster allows you to shorten the effective stroke by up to 40 mm, providing a usable travel window of 40 to 80 mm. It acts as a mechanical stop and does not hold the load without live air pressure.
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