Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S
The AirTAC SAIJ125X190-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a carbon steel piston rod and a built-in magnet for position sensing. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
With a 190mm nominal stroke and a 40mm adjustment range, this model provides a usable travel window of 150-190mm. This allows you to fine-tune the retract end position at commissioning without swapping the cylinder or adding external stops. The rear screw acts purely as a travel stop for deceleration alongside the standard air cushions, not as a lock to hold the load without live air.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 190 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 SAIJ125X190-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×190 | 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 SAIJ125X190-40S Is Used
Product Changeover
Dial in the exact 150-190mm end position during format size changes without physically swapping out the entire actuator assembly.
Machine Setup
Fine-tune the retract stop during initial commissioning to perfectly align heavy clamping forces without machining custom external spacers.
Variable End Stops
Adjust the stroke window on the fly for automated assembly lines processing parts of slightly varying heights or depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-40S the Right Cylinder?
Choose this 125mm bore when you need significantly more thrust than the 80mm option (2513N push at 0.5 MPa) but want to avoid the larger footprint of a 160mm cylinder. The adjustable stroke is ideal for product-size changeovers on a line, letting you dial in the exact 150-190mm end-stop on the fly instead of machining custom spacers for a fixed SAI cylinder. To match this ISO 15552 interchangeable cylinder exactly, specify the PT tapered port thread, the -S magnet for CMSE or DMSE electronic sensors, and a mounting bracket from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 190mm stroke is approaching mid-length, ensure your load is guided externally to prevent excessive side-loading on the 32mm carbon steel rod.
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 SAIJ125X190-40S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the effective travel from the 190mm nominal stroke down to 150mm, giving a 150-190mm usable window. It functions as a mechanical stop for end-position tuning and does not lock the load without live air pressure.
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