Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S
The AirTAC SAIJ125X350-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 340-350mm usable travel window, allowing you to trim the nominal 350mm stroke by up to 10mm during machine setup. This fine-tuning capability eliminates the need to swap cylinders or bolt on external stops when dialing in final end positions.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, which seat neatly into the sensor grooves on both sides of the extruded aluminum barrel. The carbon steel rod and M27x2 rod thread provide robust load handling, while the PT tapered port threads ensure a secure pneumatic connection. The rear adjuster acts strictly as a travel stop for position tuning, not as a lock, meaning live air is required to maintain load holding.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125X350-10S Is Used
Precision Changeover
Dial in the 340-350mm travel window during product size changes without swapping out the entire actuator.
Material Handling
Provides 6136N of push force to move heavy pallets, with a 10mm rear stopper to fine-tune the transfer end point.
Machine Setup
Simplify final commissioning of heavy machinery by trimming the stroke precisely at the rear adjuster instead of adding shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10S the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) lacks the necessary thrust, but a 160mm bore would be excessive. The adjustable 340-350mm travel window is ideal for applications requiring exact end-position tuning during commissioning or product changeovers, offering flexibility a fixed-stroke SAI cylinder cannot match. Because the total stroke is 350mm, the M27x2 rod is subject to side loads; an external guide is recommended to prevent rod bending and premature seal wear.
To match this ISO 15552 dimensionally interchangeable cylinder for a replacement, verify the 125mm bore, 350mm stroke, 10mm adjustment range, PT port threads, and the -S magnet option. For applications requiring true load holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder, as the SAIJ adjuster is not a locking mechanism. 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 SAIJ125X350-10S FAQ
At 0.5 MPa, 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 allows you to shorten the effective travel by up to 10mm, creating a 340-350mm usable window. It acts as a mechanical stop and does not lock the load without live air pressure.
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