Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75S 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 SAIJ125AX230-75S
The AirTAC SAIJ125X230-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa, featuring a 32mm SUS420J2 stainless steel rod and a PT G1/2 port. The integrated magnet enables position sensing with CMSE reed or DMSE electronic switches.
With a 230mm nominal stroke and a 75mm adjustment range, you can dial the effective travel back to anywhere between 155mm and 230mm. This built-in mechanical stopper allows precise end-position tuning during commissioning or product changeovers without swapping the cylinder. The adjuster solely sets the travel limit and relies on the air cushion for deceleration; it does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75S |
|---|---|
| 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 SAIJ125AX230-75S
| 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 SAIJ125AX230-75S Is Used
Press Stroke Tuning
Dial in the exact 155-230mm forming depth during tooling changeovers without physically replacing the actuator or adding external stopper blocks.
Variable Product Diverter
Adjust the retract end-position on the fly to handle different package sizes on a packaging line, using the 75mm trim range to accommodate multiple formats.
Heavy Load Positioning
Leverage the 6136N push force at 0.5MPa to move heavy pallets or chassis, relying on the SUS420J2 stainless rod for durability in demanding industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-75S the Right Cylinder?
Select this 125mm bore when an application requires heavy thrust (6136N push at 0.5MPa) that exceeds the 3927N capacity of a 100mm bore, but does not demand the 10053N output of a 160mm unit. The adjustable 155-230mm window is optimal for packaging lines or presses needing variable end-stops across different product sizes. If your machine requires true load-holding without continuous air pressure, pair this cylinder with an external pilot-operated check valve or select an AirTAC SAIL or BSAI locking model instead.
For an exact ISO 15552 replacement, match the 125mm bore, 230mm nominal stroke, 75mm adjustment code, PT G1/2 port, and -S magnet. Because the stroke is 230mm, ensure external guiding is used to prevent excessive side-loading on the 32mm rod. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ125AX230-75S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 230mm nominal stroke by up to 75mm. This creates a usable travel window of 155-230mm for fine-tuning end positions at commissioning without changing the cylinder.
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