Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 600mm 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
- Stroke600 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20
The AirTAC SAIJ125X600-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. It provides a usable travel window of 580 to 600 mm, giving you precise control over the retract distance without adding external stops. Built to deliver 6136 N of push force at 0.5 MPa, it handles heavy loads with ease.
This model features a SUS420J2 stainless steel rod for improved corrosion resistance and uses a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors. Because the 600 mm stroke is quite long, an external guide is recommended to manage side loads and prevent rod deflection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 600 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 SAIJ125AX600-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×600 | 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 SAIJ125AX600-20 Is Used
Machine Changeover
Dial in the exact retract position within the 580-600 mm window during product size changes without swapping out the entire actuator.
Variable End Stops
Fine-tune the end-of-stroke position at commissioning to absorb mechanical tolerances and set precise clamping distances on the fly.
Heavy Load Positioning
Leverage 6136 N of thrust to push heavy fixtures or pallets into place, relying on the built-in stop for consistent final positioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX600-20 the Right Cylinder?
Choose this 125 mm bore when you need more force than a 100 mm bore provides (3927 N push at 0.5 MPa) but want to avoid stepping up to a massive 160 mm unit. The adjustable stroke is ideal for machine changeovers, letting you dial in the exact end position during commissioning rather than machining custom spacers. Unlike a fixed-stroke SAI cylinder, this rear adjuster lets you trim the travel by up to 20 mm on the fly.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 600 mm stroke, 20 mm adjustment, PT G1/2 port, and your required mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster is a travel stop, not a lock; the cylinder will not hold its load without live air pressure. For load-holding without air, use an external rod lock or explore SAIL or BSAI models.
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 SAIJ125AX600-20 FAQ
A rear external screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 20 mm. This creates a usable travel window of 580 to 600 mm, letting you trim the retract end position without changing the cylinder or adding external spacers.
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can deliver up to 11045 N of push force at 0.7 MPa.
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