Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-10S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X375-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 375mm 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
- Stroke375 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 SAIJ125X375-10S
The AirTAC SAIJ125X375-10-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. Because this specific SKU includes the -S magnet option, it directly supports AirTAC CMSE reed and DMSE electronic solid-state sensors housed within the dual-side sensor grooves on the extruded aluminum barrel.
This model features a 375mm nominal stroke that can be precisely dialed back by up to 10mm via the external rear stopper, creating a 365-375mm usable travel window. This built-in adjustability allows you to fine-tune the retract end position during commissioning or product changeovers without swapping the cylinder or adding external stops. The adjuster acts strictly as a travel stop to set the deceleration point alongside the standard air cushions, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 375 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 SAIJ125X375-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×375 | 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 SAIJ125X375-10S Is Used
Product Size Changeover
Dial in the 365-375mm travel window during packaging line format changes to accommodate different carton depths without physically swapping out actuators.
End-Position Calibration
Fine-tune the retract stroke by up to 10mm during machine commissioning to perfectly seat heavy 6136N loads against a hard stop without mechanical shims.
Variable End-Stop Actuation
Provide adjustable retraction limits on automated assembly presses where the exact bottoming-out position needs occasional tweaking based on tooling wear.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X375-10S the Right Cylinder?
The adjustable 365-375mm travel window is perfect for setups requiring variable end-stops, whereas a fixed-stroke SAI cylinder is better when the exact travel is already locked. For load-holding without continuous air pressure, you must integrate an external pilot-operated check valve or switch to an AirTAC SAIL or BSAI lock cylinder, as the SAIJ adjuster is not a brake.
When replacing an ISO 15552 cylinder, match the 125mm bore, 375mm stroke, 10mm adjustment range, G1/2 PT ports, and the -S magnet. Note that SAIJ uses a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 375mm stroke is relatively long, the 32mm rod diameter will still experience leverage forces; always use an external guide to prevent excessive side-loading on the cylinder body.
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 SAIJ125X375-10S FAQ
If you increase the pressure to 0.7 MPa, the push force rises to 8590N.
The rear adjuster screw allows you to shorten the 375mm nominal stroke by up to 10mm, resulting in a usable travel window of 365-375mm. It functions as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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