Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 185mm 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
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10
The AirTAC SAIJ125X185-10 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It provides a nominal 185 mm travel that can be fine-tuned backward by up to 10 mm, creating a precise 175-185 mm usable window for dialing in exact end positions during commissioning. Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, it handles heavy actuation tasks reliably.
This variant utilizes a SUS420J2 stainless steel rod (code A) for superior corrosion resistance and ships with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for mounting AirTAC CMSE reed or DMSE electronic sensors. It is important to note that the rear adjuster acts only as a travel stop for deceleration and positioning; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 185 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 SAIJ125AX185-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×185 | 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 SAIJ125AX185-10 Is Used
Machine Changeovers
Dial in the 175-185 mm travel window during product size changes to set new end positions without physically swapping cylinders or adding spacer blocks.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy jigs, using the rear stopper to fine-tune the final press depth accurately.
Commissioning Calibration
Trim the effective stroke by up to 10 mm during initial machine setup to compensate for mechanical tolerances and achieve exact end-of-stroke positioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX185-10 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the thrust for moving heavy assemblies, but you want to avoid stepping up to a massive 160 mm body. The 10 mm adjustment range is ideal for product changeovers, letting you shift the end-stop by millimeters without swapping the cylinder or adding external stops. For load-holding without continuous air pressure, this standard SAIJ adjuster will not act as a lock—consider an AirTAC SAIL or BSAI cylinder instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 185 mm stroke, 10 mm adjustment, PT G1/2 port, and your required mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, but omits FB, CA, CB, and CR. Because the 185 mm stroke is under the 300 mm side-load threshold, external guiding is less critical than on longer strokes, though the 32 mm rod and M27x2 thread handle substantial loads.
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 SAIJ125AX185-10 FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the 185 mm nominal stroke by up to 10 mm. This provides a 175-185 mm usable travel window for fine-tuning the retract end position without replacing the cylinder.
At 0.5 MPa operating pressure, it generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, the push force reaches 1251 kgf.
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