Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40S 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 SAIJ125AX230-40S
The AirTAC SAIJ125X230-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, providing a usable travel window of 190 to 230 mm. Built with a SUS420J2 stainless steel rod and a magnetic piston for position detection, it generates 6136 N of pull force at 0.5 MPa. The external stopper allows you to fine-tune the retract end-position at commissioning without swapping out the entire cylinder.
This adjustable-stroke model uses PT tapered ports and operates at speeds of 30-500 mm/s. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. The integrated sensor grooves on both sides of the extruded aluminum barrel accept CMSE reed and DMSE electronic switches for flexible mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40S |
|---|---|
| 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 SAIJ125AX230-40S
| 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 SAIJ125AX230-40S Is Used
Variable End-Stop Positioning
Dial in the retract distance within the 190-230 mm window for product size changes without replacing hardware.
Heavy Machinery Changeover
Provides 6136 N pull force for large format presses, allowing quick mechanical setup adjustments.
Commissioning Fine-Tuning
Use the 40 mm rear screw to trim the exact end position during machine setup, avoiding external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX230-40S the Right Cylinder?
Select this 125 mm bore when your application requires heavy thrust up to 6136 N pull at 0.5 MPa, stepping up from an 80 mm bore that offers 2268 N pull. The 40 mm adjustment range is ideal for product changeovers or variable end-stops on a line, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. If your machine needs to hold a load without live air pressure, note that the rear adjuster acts only as a travel stop and not a lock; you must use a SAIL or BSAI cylinder instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 230 mm nominal stroke, 40 mm adjustment, PT port threads, and the -S magnet option. Because the stroke is 230 mm, ensure proper external guiding to prevent excessive side-load on the 32 mm rod and M27x2 thread.
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 SAIJ125AX230-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, it reaches up to 11045 N of push force.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 40 mm, creating a 190-230 mm usable travel window. It sets the end position but does not lock or hold the load without live air pressure.
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Standard models usually ship in 3-4 days.
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