Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-40S 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 SAIJ125AX190-40S
The AirTAC SAIJ125X190-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel window between 150 and 190 mm without swapping out the unit. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning tasks. The rod is constructed from SUS420J2 stainless steel (material code A), offering enhanced resistance to corrosion and surface wear compared to standard carbon steel.
This model includes a magnetic piston for position feedback, compatible with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual-side sensor grooves on the extruded aluminum barrel. It uses PT G1/2 port threads and features variable air cushions at both ends to manage impact deceleration. The rear adjuster acts purely as a mechanical stop to set the end position; it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-40S |
|---|---|
| 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 SAIJ125AX190-40S
| 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 SAIJ125AX190-40S Is Used
Press Fit Depth Tuning
Dial in the exact press depth for bearings or pins during machine setup by trimming the stroke within the 150-190 mm window, accommodating different part tolerances on the fly.
Variable Product Diverting
Adjust the retract position on a heavy-duty conveyor diverter to handle varying package sizes without physically remounting the cylinder or adding external stopper blocks.
Heavy Material Positioning
Leverage the 6136 N push force at 0.5 MPa to shift heavy pallets or workpieces, using the rear stopper to precisely set the end-of-line staging distance.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX190-40S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial thrust—such as 6136 N at 0.5 MPa or 8590 N at 0.7 MPa—alongside variable end-stop positioning for product changeovers. If your process demands less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The adjustable travel is ideal for dialing in exact end-of-stroke limits at commissioning, avoiding the need to machine external spacers.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 190 mm stroke, 40 mm adjustment range, PT G1/2 ports, and SUS420J2 rod material. Mounting options include the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. For load-holding requirements without live air, note that this cylinder's adjuster is only a stop; consider an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead. Additionally, the M27x2 rod thread and 32 mm rod diameter handle high side loads, but an external guide rail is recommended for heavy offset 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 SAIJ125AX190-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the nominal 190 mm down to 150 mm. This provides a 40 mm tuning window for precise end-position setting during commissioning without replacing the cylinder.
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