Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10
The AirTAC SAIJ125X165-10 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 125mm bore, a 32mm carbon steel rod, and PT tapered ports. By integrating an external adjusting screw, this actuator allows you to fine-tune the retract end position, creating a precise 155-165mm usable travel window without swapping out the entire cylinder.
The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. It supports a reduced set of ISO 15552 mounting options—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR. The rear stopper relies on the variable air cushion to decelerate the load, meaning it functions strictly as a travel end setter rather than a locking device.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125X165-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125X165-10 Is Used
Product Changeovers
Dial in the 155-165mm travel window during format changes on packaging lines, ensuring precise end-positioning without replacing actuators.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5 MPa to seat heavy components, using the 10mm adjuster to fine-tune the pressing depth at commissioning.
Variable End Stops
Set exact retract positions for automated machining fixtures, relying on the rear screw to trim the 165mm stroke exactly to the process requirement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-10 the Right Cylinder?
Choose this 125mm bore when an 80mm bore (providing 2513N push at 0.5 MPa) lacks sufficient thrust for heavy positioning tasks. An adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, eliminating the need to bolt on external stops. To match this ISO 15552 footprint, specify the 125mm bore, 165mm stroke, 10mm adjustment, PT port thread, and your desired mounting style. Because this model lacks a magnet, adding position sensing requires specifying the -S option for CMSE reed or DMSE electronic sensors. Note that the rear adjuster will not hold a load without live air; 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 SAIJ125X165-10 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. The operating speed range is 30-500 mm/s, supported by 40mm variable air cushions at both ends.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the nominal 165mm stroke by up to 10mm. This creates a 155-165mm usable travel window for fine-tuning end positions during setup.
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