Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-100S 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 SAIJ125X325-100S
The AirTAC SAIJ125X325-100-S 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 piston rod and a PT tapered port thread. Because this SKU carries a 100mm adjustment code, its usable travel window spans 225 to 325mm, allowing precise end-position tuning without swapping hardware.
This extruded aluminum profile cylinder includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The rear screw acts purely as a travel stop to decelerate the load, not as a lock, so live air is required to hold position. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-100S |
|---|---|
| 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 SAIJ125X325-100S
| 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 SAIJ125X325-100S Is Used
Product Size Changeovers
Dial in the 225-325mm travel window during format changeovers to accommodate varying package lengths without changing the cylinder.
Machine Setup Tuning
Fine-tune the retract end-position at commissioning to perfect the mechanical timing of heavy assembly presses.
Variable End Stops
Use the 100mm rear stopper to adjust the end of stroke dynamically for sorting diverter gates handling mixed product sizes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-100S the Right Cylinder?
Choose this 125mm bore when a 100mm bore provides insufficient thrust (offering 3927N push at 0.5 MPa), but a 160mm bore would be excessive (delivering 10053N). The 100mm adjustment range is ideal for machines handling frequent product-size changeovers, replacing the need for fixed-stroke SAI cylinders or external stops. For load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead of relying on the adjuster.
Because the 325mm stroke creates an extended lever arm, an external guide is recommended to prevent side-loading damage to the 32mm rod. To match this ISO 15552 dimensionally interchangeable cylinder, specify the 125mm bore, 325mm stroke, 100mm adjustment, PT port, and the desired mounting and sensor hardware.
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 SAIJ125X325-100S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel from the 325mm nominal stroke down to 225mm. This stopper only sets the end position and does not lock the load without live air.
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