Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X185-75S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke185 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S
The AirTAC SAIJ125X185-75-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. The integrated -S magnet enables position detection, functioning seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed within the dual-side sensor grooves.
Featuring a 185mm nominal stroke paired with a 75mm adjustment range, this unit yields a highly flexible 110-185mm usable travel window. This broad adjustment capability allows operators to dial in exact retract end positions during commissioning or product changeovers without swapping hardware. It utilizes a PT tapered port thread, a 32mm carbon steel rod, and variable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S |
|---|---|
| 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S
| 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 SAIJ125X185-75S Is Used
Product Changeover
Quickly reconfigure the 110-185mm travel window on packaging lines to accommodate different carton sizes without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to achieve exact clamping or pressing depths, avoiding costly mechanical shimming.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X185-75S the Right Cylinder?
The adjustable stroke is chosen over a fixed SAI cylinder when a machine handles varying product sizes, allowing the retract end-stop to be fine-tuned on the fly. Because the 185mm stroke is below the 300mm threshold, external side-load guides are less critical, though the robust 32mm rod naturally handles higher eccentric loads.
For a direct ISO 15552 replacement match, ensure the target cylinder shares the 125mm bore, 185mm nominal stroke, 75mm adjustment, PT port, and -S magnet. Note that the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for dead-air load holding, consider an AirTAC SAIL or BSAI cylinder. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X185-75S FAQ
At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as an external stopper, allowing you to shorten the effective stroke by up to 75mm from the 185mm nominal length. This creates a usable travel window of 110-185mm, enabling precise end-position tuning without adding external stops.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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