Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50S 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 SAIJ125AX230-50S
The AirTAC SAIJ125X230-50-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 180 to 230 mm, allowing you to dial in the retract end-position precisely during commissioning without external stops. Built with a SUS420J2 stainless steel rod (code A), it delivers 6136 N of pull force at 0.5 MPa and includes a magnet for CMSE and DMSE sensors.
This 125 mm bore profile cylinder uses PT tapered ports and operates at speeds of 30-500 mm/s. The rear adjuster acts purely as a travel stop for deceleration, meaning it will not hold a load without live air pressure. For true load-holding, an external rod lock or the SAIL series is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50S |
|---|---|
| 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 SAIJ125AX230-50S
| 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 SAIJ125AX230-50S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 180-230 mm window during machine commissioning to accommodate different product sizes without changing hardware.
Press Fit Adjustment
Fine-tune the final pressing position on the assembly line by trimming up to 50 mm off the nominal stroke, ensuring precise contact without adding external stopper blocks.
Changeover Setup
Speed up production line changeovers by adjusting the rear stopper screw to meet new fixture requirements quickly, leveraging the 6136 N pull force for robust actuation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-50S the Right Cylinder?
Select this adjustable-stroke model when an application requires fine-tuning of the end-of-stroke position during machine setup or product changeover, avoiding the need to physically swap cylinders. If your process demands less force, stepping down to a 100 mm bore yields 3681 N of pull at 0.5 MPa.
Because this 230 mm stroke exceeds 300 mm is false here, but for longer unsupported strokes, an external guide is recommended to handle side-load. This SKU is dimensionally interchangeable per ISO 15552 and specifies a PT port thread, SUS420J2 rod material, and a magnet for solid-state DMSE or reed CMSE switches.
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 SAIJ125AX230-50S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that can shorten the 230 mm nominal stroke by up to 50 mm, giving an effective travel range of 180 to 230 mm. It sets the end position but does not lock the load without air pressure.
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