Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-20S 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 SAIJ125X190-20S
The AirTAC SAIJ125X190-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a robust 6136N push force at 0.5 MPa and features a 170-190mm usable travel window, allowing you to trim the 190mm nominal stroke by up to 20mm during commissioning. This built-in adjustability eliminates the need to swap cylinders or add external stops when fine-tuning end positions.
This model includes a magnetic piston for position sensing and uses standard carbon steel rod material. The extruded aluminum barrel incorporates sensor grooves on both sides, directly supporting AirTAC CMSE reed and DMSE electronic solid-state switches. It operates at 30-500mm/s and features PT tapered port threads (G1/2) for secure pneumatic connections.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-20S |
|---|---|
| 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 SAIJ125X190-20S
| 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 SAIJ125X190-20S Is Used
Product Changeover
Dial in the 170-190mm travel window instantly on the rear adjuster when switching between slightly different product sizes on the same production line.
End-Position Tuning
Fine-tune the retract stop during machine commissioning without machining external stopper blocks or removing the cylinder from its ISO 15552 mount.
Heavy Forming Operations
Leverage the 6136N push force at 0.5MPa for pressing or forming tasks where the exact bottoming position must be micro-adjusted on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-20S the Right Cylinder?
Select this 125mm bore cylinder when a 100mm bore (offering 3927N push at 0.5MPa) lacks the necessary thrust, but a 160mm bore is physically too large for the machine envelope. The adjustable 170-190mm travel window is ideal for production lines handling slight product size variations, allowing operators to dial in the exact retract stop without changing the mounting footprint. The rear adjuster acts purely as a mechanical stop and does not hold the load without live air; for true load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI series cylinder.
Because the 190mm stroke is relatively short for this large bore, side-load risks are minimal, but the 32mm rod diameter and M27x2 rod thread still handle substantial off-center loads better than smaller bores. This SAIJ model is dimensionally interchangeable per ISO 15552 and utilizes a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. Ensure your setup matches the PT port standard and leverages the included -S magnet for precise end-of-stroke confirmation.
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 SAIJ125X190-20S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to shorten the 190mm nominal stroke by up to 20mm, creating a 170-190mm usable travel window. It functions as a mechanical stop to set the retract end position and does not lock the load without continuous air pressure.
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