Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-75 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 SAIJ125X190-75
The AirTAC SAIJ125X190-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a generous 6136N of push force at 0.5MPa, utilizing a 32mm carbon steel rod and a PT tapered G1/2 port. An external rear stopper mechanism allows you to shorten the effective travel, creating a usable window of 115-190mm for precise end-position tuning.
This built-in adjustability lets you dial in the exact stroke during commissioning or product changeovers without swapping out the entire cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic sensors. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-75 |
|---|---|
| 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 SAIJ125X190-75
| 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 SAIJ125X190-75 Is Used
Variable-Length Pressing
Adjust the end-stop up to 75mm to accommodate different material lengths on a single press line without changing tooling.
Product Changeover Stops
Quickly reposition the travel end-point during packaging line format changes to handle varying box dimensions on the fly.
Machine Setup Tuning
Fine-tune the 190mm nominal stroke during initial commissioning to perfectly time the mechanical sequence of heavy machinery.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X190-75 the Right Cylinder?
Select this 125mm bore when an application requires high thrust forces that exceed the 3927N push capacity of a 100mm bore at 0.5MPa. The 75mm adjustment range is ideal for machinery processing varying product lengths, allowing rapid end-stop modifications directly at the cylinder. For operations needing true load-holding without continuous air supply, this cylinder is insufficient as the adjuster is not a brake; consider the AirTAC SAIL or BSAI series instead.
As a dimensionally interchangeable ISO 15552 profile cylinder, it uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The 190mm stroke is below the 1500mm maximum standard, so it is a stock configuration. Operating speed ranges from 30-500mm/s, and the 32mm rod thread (M27x2) handles substantial side loads, though an external guide is recommended for heavy radial loads.
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 SAIJ125X190-75 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. At the maximum 1.0MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back from the 190mm nominal stroke down to as little as 115mm. This creates a 75mm adjustable window for fine-tuning the end position without replacing the cylinder.
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