Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S
The AirTAC SAIJ125X115-10-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 SUS420J2 stainless steel rod and a built-in magnet for position sensing. By integrating an external adjusting screw, this actuator allows you to fine-tune the retract end position during commissioning without swapping out the entire cylinder.
With a 115mm nominal stroke and a 10mm adjustment range, this model provides a usable travel window of 105-115mm. This built-in flexibility is perfect for accommodating minor product size variations on a production line. The extruded aluminum barrel includes sensor grooves on both sides, seamlessly accepting CMSE reed and DMSE electronic solid-state switches to track piston position accurately.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125AX115-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125AX115-10S Is Used
Product Size Changeovers
Dial in the 10mm stroke adjustment during line changeovers to accommodate slightly different product lengths without replacing the actuator.
Heavy Clamping Force
Leverage the 6136N push force at 0.5 MPa to securely clamp heavy workpieces, using the rear stop to fine-tune the exact clamping depth.
End-Stop Calibration
Perfect for assembly stations needing precise retract positioning, using the rear screw to set the exact 105-115mm travel window at commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-10S the Right Cylinder?
Selecting this 125mm bore actuator makes sense when your application requires heavy thrust up to 6136N at 0.5 MPa but still demands precise end-position tuning. If you need less force, stepping down to a 100mm bore yields 3927N, whereas moving up to a 160mm bore provides 10053N. Because the nominal stroke is 115mm, you bypass the side-load risks associated with longer strokes, though external guides remain a good practice for heavy radial loads.
This adjustable-stroke model is chosen over a fixed SAI cylinder when machine setups require variable end-stops or frequent product changeovers. To match this ISO 15552 dimensionally interchangeable cylinder for a replacement, verify the 125mm bore, 115mm stroke, PT tapered port threads, and the -S magnet option. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For true load-holding, consider an external rod lock or the AirTAC SAIL 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 SAIJ125AX115-10S FAQ
At 0.5 MPa operating pressure, 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 adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 10mm. This creates a usable travel window of 105-115mm, enabling fine-tuning of the end position without adding external stops.
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