Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S
The AirTAC SAIJ125X325-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, providing robust actuation for heavy-duty machinery. The integrated magnet (-S) enables direct position sensing using AirTAC CMSE reed or DMSE electronic solid-state switches mounted into the dual-side sensor grooves.
This specific SKU features a 325 mm nominal stroke that can be fine-tuned down by up to 10 mm, creating a precise 315-325 mm usable travel window. The extruded aluminum barrel design omits tie-rods, and the rear stopper screw allows you to dial in the retract end position during commissioning without adding external physical stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125X325-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125X325-10S Is Used
Product Size Changeovers
Dial in the 315-325 mm travel window during format changes on a packaging line, using the 10 mm rear adjuster to hit the exact retract position without swapping hardware.
Heavy-Duty Pressing
Leverage the 6136 N push force at 0.5 MPa for pressing operations, fine-tuning the end-stop to accommodate material thickness variations on the fly.
Automated Assembly Stops
Set precise retract limits on large automated assembly stations, relying on the PT G1/2 port and robust 125 mm profile to handle high flow and heavy masses.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-10S the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore (10053 N push) would be physically oversized. The adjustable stroke is ideal for product changeovers on a line, letting you shift the end-stop by up to 10 mm rather than swapping the entire cylinder for a fixed-stroke SAI variant. Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (excluding FB, CA, CB, and CR).
Because this model features a 325 mm stroke, the 32 mm diameter carbon steel rod and M27x2 rod thread will experience amplified side-loading moments if the load is unsupported; an external guide rail is recommended. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air pressure. For true load-holding, consider an external rod lock or the AirTAC SAIL/BSAI locking cylinder 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 SAIJ125X325-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers a maximum push force equivalent to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 325 mm nominal stroke by up to 10 mm, providing a usable travel window of 315-325 mm. It only sets the end position and does not lock the load without continuous air pressure.
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