Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20S 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 SAIJ125AX190-20S
The AirTAC SAIJ125X190-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5 MPa and features a 170-190mm usable travel window, letting you trim the nominal 190mm stroke by up to 20mm during commissioning. The SUS420J2 stainless steel rod (code A) provides enhanced corrosion resistance compared to standard carbon steel.
This model includes a magnetic piston (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, which seat cleanly into the sensor grooves on both sides of the extruded aluminum barrel. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position; it does not lock the load without live air. For position holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20S |
|---|---|
| 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 SAIJ125AX190-20S
| 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 SAIJ125AX190-20S Is Used
Machine Changeover
Dial in the 170-190mm retract end-stop precisely when switching between product sizes, avoiding mechanical rebuilds.
Clamp Positioning
Fine-tune the clamping depth on large fixtures using the 6136N thrust without adding external stopper blocks.
Assembly Line Tuning
Set exact retraction points during commissioning to prevent over-travel and optimize cycle timing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-20S the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder (offering 3927N push at 0.5MPa) lacks thrust, but a 160mm bore (10053N) is physically oversized. The adjustable 170-190mm window is perfect for product changeovers on a packaging line, eliminating the need to swap cylinders or bolt on external stops. The PT tapered port threads match standard pneumatic fittings, and the reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omits FB, CA, CB, and CR.
Because the 190mm stroke is under the 300mm threshold, side-load risks are moderate, but the 32mm rod diameter handles typical off-center loads well. If your application requires the cylinder to hold its position without continuous air pressure, the rear stopper cannot act as a brake—you must integrate an external rod lock or pilot-operated check valve.
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 SAIJ125AX190-20S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 11045N push force at 0.9 MPa.
The rear mechanical screw allows you to shorten the effective stroke by up to 20mm, creating a 170-190mm travel window. It functions as an end-position stop for setup tuning, not a load-holding lock.
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