Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 230mm 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
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75
The AirTAC SAIJ125X230-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 230 mm travel by up to 75 mm. This creates a highly flexible 155 to 230 mm usable end-position window, ideal for dialing in exact retract distances during machine commissioning or product changeovers without swapping hardware. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with ease.
This unit features a SUS420J2 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The rear screw acts purely as a mechanical stop to fine-tune deceleration alongside the standard air cushions; it is not a locking device and will not hold a load without continuous air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAIJ125AX230-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SAIJ125AX230-75 Is Used
Product Changeover
Quickly adapt retract distances on packaging lines handling varying container sizes, utilizing the 75 mm adjustment window to avoid physical cylinder swaps.
Machine Setup
Fine-tune the end-stop position during initial commissioning to achieve precise mechanical alignment without adding external stopper blocks.
Heavy Forming
Leverage the 6136 N push force at 0.5 MPa for pressing and forming operations where the exact bottoming position must be dialed in on-site.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application requires substantial thrust—such as 6136 N push or 5734 N pull at 0.5 MPa—but demands variable retract end-stops. If you need less force, stepping down to a 100 mm bore provides 3927 N push force, while moving up to a 160 mm bore yields 10053 N. The generous 75 mm adjustment range is perfect for prototyping or lines running multiple product sizes, replacing the need to inventory several fixed-stroke SAI cylinders.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 230 mm nominal stroke, 75 mm adjuster, PT port thread, and desired mounting accessory. SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this unit lacks a magnet, it cannot host CMSE or DMSE sensors without modification. Furthermore, with a 230 mm stroke, ensure external guides are used to manage side loads and protect the 32 mm rod thread from deflection.
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 SAIJ125AX230-75 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm, providing a usable travel window between 155 mm and 230 mm. It acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
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