Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100
The AirTAC SAIJ125X105-100 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa and features a 105mm nominal stroke that can be dialed back by up to 100mm, yielding a highly versatile 5-105mm usable travel window. This wide adjustment band allows operators to fine-tune end positions directly at the machine without swapping hardware.
Built with a standard carbon steel piston rod and a PT tapered port thread, this extruded aluminum barrel design excludes tie-rods. It supports a speed range of 30-500mm/s and uses adjustable air cushions at both ends to decelerate the load. The rear stopper screw sets the retract limit but does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 105 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 SAIJ125X105-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×105 | 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 SAIJ125X105-100 Is Used
Variable End-Stop Tuning
Dial in the exact retract distance from 5 to 105mm during machine commissioning to perfect material positioning without machining new stop blocks.
Product Size Changeover
Quickly adapt a packaging line to different carton sizes by turning the rear adjuster, shifting the 6136N push stroke as needed.
Heavy Assembly Pressing
Leverage the 125mm bore thrust for light pressing duties while retaining the ability to tweak the bottoming position on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X105-100 the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires the 6136N push force (at 0.5 MPa) of a large-bore actuator alongside extreme setup flexibility. If you need less force, stepping down to an 80mm bore yields 2513N; if you need more, a 160mm bore provides 10053N. The 5-105mm adjustable window is perfect for prototyping or product changeovers, replacing the need for multiple fixed-stroke SAI cylinders. To match this ISO 15552 footprint, specify the 125mm bore, 105mm stroke, 100mm adjustment, PT port, and no magnet. Mounting choices are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke exceeds 300mm? No, but the massive 100mm adjustment on a short barrel means you must ensure the external guide can handle the variable overhang. For load-holding without air, use an external rod lock or choose a SAIL or BSAI cylinder.
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 SAIJ125X105-100 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 adjuster acts as a mechanical stop, allowing you to trim the 105mm nominal stroke back by up to 100mm. This creates a 5-105mm usable travel window for fine-tuning end positions, though it does not lock the load without continuous air pressure.
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