Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50 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 SAIJ125X190-50
The AirTAC SAIJ125X190-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 140 to 190 mm, allowing you to dial back the nominal 190 mm stroke by up to 50 mm during machine commissioning. This bore size delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of position switches. It uses a PT tapered G1/2 port and a 32 mm carbon steel rod with an M27x2 thread. The rear adjuster acts purely as a mechanical stop to set the end position, meaning it does not hold the load without live air pressure; for fail-safe load holding, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50 |
|---|---|
| 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 SAIJ125X190-50
| 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 SAIJ125X190-50 Is Used
Machine Changeover
Dial in the 140-190 mm travel window during product size changes without physically replacing the cylinder or bolting on external stoppers.
Heavy-Duty End Tuning
Leverage the 6136 N push force at 0.5 MPa to move heavy assemblies, using the 50 mm rear adjuster to precisely set the final retracted position.
Assembly Line Positioning
Set variable end-stops for different workpiece lengths on a single conveyor station, relying on the M27x2 threaded rod for secure tool mounting.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-50 the Right Cylinder?
Choose this 125 mm bore when your application requires more force than the 100 mm version (3927 N at 0.5 MPa) but less than the massive 160 mm class (10053 N). The 50 mm adjustment range is ideal for product changeovers on a production line, letting you shift the end-of-stroke position without swapping the cylinder or adding external stops. Since the 190 mm stroke is under the 300 mm side-load threshold, the robust 32 mm rod handles standard loads well, though long unsupported travel still requires external guidance.
As a true ISO 15552 cylinder, it is dimensionally interchangeable with other ISO 15552 profile cylinders. To match this exact configuration, specify the 125 mm bore, 190 mm stroke, 50 mm adjustment, PT G1/2 port, and the standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that SAIJ omits the FB, CA, CB, and CR mounts. This unit has no magnet; if you need position sensing, add the -S option for CMSE reed or DMSE electronic sensors.
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 SAIJ125X190-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. The maximum thrust is 1251 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 190 mm nominal stroke down to as little as 140 mm. It only sets the end position and does not lock the load without continuous air pressure.
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