Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40S 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 SAIJ125X230-40S
The AirTAC SAIJ125X230-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 6136N push force at 0.5 MPa and features a built-in magnet for CMSE and DMSE sensors. The integrated rear stopper allows you to trim the effective travel, creating a precise 190 to 230 mm usable window without swapping hardware.
This bore utilizes a 32 mm carbon steel rod and an M27x2 thread to handle substantial side loads, while the PT tapered port ensures a secure pneumatic seal. You can fine-tune the retract end position directly during commissioning, avoiding the need to bolt on external stops. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40S |
|---|---|
| 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 SAIJ125X230-40S
| 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 SAIJ125X230-40S Is Used
Product Changeovers
Dial in the 190-230 mm travel window during format changes to accommodate different package sizes without replacing the cylinder.
Machine Setup
Fine-tune the retract end position at commissioning using the rear screw, ensuring precise alignment without external stoppers.
Variable End Stops
Adjust the stroke dynamically on automated assembly lines to hit multiple target positions from a single actuator.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X230-40S the Right Cylinder?
Select this 125 mm bore when an 80 mm bore falls short of the required 2268N pull force at 0.5 MPa, but you want to avoid stepping up to a 160 mm bore that delivers 9425N. The 40 mm adjustment range is perfect for production lines handling varying product sizes, letting you set exact end-stops on the fly. For any application near the 230 mm stroke length, ensure external guides support the load to prevent excessive rod wear.
To replace an existing cylinder, verify the 125 mm bore, 230 mm nominal stroke, 40 mm adjustment requirement, PT port threads, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider an AirTAC 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 SAIJ125X230-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At 0.9 MPa, the push force increases to 11045N.
The rear adjuster acts as a mechanical stop that lets you shorten the 230 mm nominal stroke by up to 40 mm, providing an effective travel range of 190 to 230 mm. It functions as a stop, not a lock, so the cylinder requires live air to maintain its position.
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