Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 180mm 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
- Stroke180 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S
The AirTAC SAIJ125X180-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 80 to 180 mm. It delivers a robust 6136 Newtons of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and because this SKU includes the -S magnet option, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model features an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance in demanding environments. The rear adjuster functions strictly as a mechanical stop to decelerate the travel end, meaning it will not hold a load without continuous live air pressure. For applications requiring true pneumatic load-holding, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 180 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 SAIJ125AX180-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×180 | 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 SAIJ125AX180-100S Is Used
Machine Changeover
Dial in the exact end-stop during product size changes on a packaging line, utilizing the 80-180 mm travel window to adapt quickly without changing hardware.
Heavy Press Positioning
Leverage the 6136N pull force to seat heavy components accurately, using the rear adjuster to compensate for mechanical tolerances during initial setup.
Sensor-Driven Sorting
Use the -S magnet with DMSE electronic sensors to confirm end positions in automated sorting gates, adjusting the travel limit as needed for different package sizes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX180-100S the Right Cylinder?
Selecting this 125 mm bore cylinder over a smaller 100 mm option steps the pull force up from 3681N to 6136N at 0.5 MPa, providing substantially higher thrust for heavy actuators. An adjustable stroke is highly beneficial when you need to fine-tune the end position during machine commissioning or product changeovers without physically swapping the cylinder or adding external shims. When specifying a replacement, ensure you match the 180 mm stroke, the 100 mm adjustment range, the PT tapered port thread, and the -S magnet requirement.
Because the 180 mm stroke is relatively long, the 32 mm piston rod should be adequately supported to prevent excessive side-loading and premature seal wear. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting the FB, CA, CB, and CR variants found on other 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 SAIJ125AX180-100S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 Newtons of pull force and 8590 Newtons of push force. The maximum thrust is 1251 kgf at 1.0 MPa.
The rear adjuster screw lets you mechanically shorten the 180 mm nominal stroke by up to 100 mm, creating an 80 to 180 mm usable travel window. It acts as a stop to tune the end position and does not lock the load without live air.
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