Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10 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 SAIJ125X185-10
The AirTAC SAIJ125X185-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a carbon steel rod and a PT tapered port thread. By turning the rear screw, you achieve a 175-185mm usable travel window for precise end-position tuning without adding external stops.
This adjustable-stroke design excels during machine commissioning or product changeovers. The rear mechanism acts purely as a travel stop and does not hold the load without live air; for dead-air holding, consider the SAIL or BSAI variants. You can mount CMSE or DMSE sensors in the dual-side barrel grooves if a magnet is specified separately.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10 |
|---|---|
| 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 SAIJ125X185-10
| 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 SAIJ125X185-10 Is Used
Machine Changeover
Dial in the 175-185mm travel window during product size changes to set exact retract endpoints without swapping hardware.
Heavy Clamping Setup
Leverage the 6136N push force for heavy-duty clamping, using the rear stop to fine-tune the grip position at commissioning.
Assembly Line Tuning
Adjust the stroke by up to 10mm on the fly to synchronize large actuators across an automated assembly line.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-10 the Right Cylinder?
Select this 125mm bore when a 63mm cylinder (providing 1559N push at 0.5 MPa) lacks the thrust for heavy positioning tasks, but an 80mm bore (2513N) is still too small. The 10mm adjustment window is ideal for dialing in exact endpoints during setup. For load-holding without air pressure, use an external rod lock or pilot-operated check valve, as the adjuster is not a brake.
To match this exact ISO 15552 replacement, specify: 125mm bore, 185mm stroke, 10mm adjustment, PT port thread, carbon steel rod, and no magnet. The mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 185mm stroke is relatively short for this large bore, side-load risks are minimal, but external guiding remains recommended for optimal cylinder longevity.
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 SAIJ125X185-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 185mm nominal stroke by up to 10mm, creating a 175-185mm usable travel window. It functions as a mechanical stop for end-position tuning and is not a locking device.
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