Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S
The AirTAC SAIJ125X115-50-S is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, allowing you to fine-tune the retract end-position during commissioning. With a 115 mm nominal stroke and a 50 mm adjustment screw, it provides a usable travel window of 65 to 115 mm without needing external stops. It delivers substantial force, offering 6136 N push and 5734 N pull at 0.5 MPa.
This specific SKU features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE solid-state switches. It uses a PT tapered G1/2 port and includes variable air cushions at both ends to manage kinetic energy.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125AX115-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125AX115-50S Is Used
Machine Changeovers
Quickly adapt the retract end-stop to accommodate varying product lengths on a single production line without changing the cylinder.
Commissioning Calibration
Fine-tune the final end position during machine setup to achieve precise mechanical alignment, eliminating the need for external stopper blocks.
Variable End Stops
Provide a flexible 65 to 115 mm travel window for automated equipment that requires periodic adjustment of the retraction depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-50S the Right Cylinder?
Choose this 125 mm bore when your application requires high force (6136 N at 0.5 MPa) but demands a flexible end-stop for product changeovers. If you need less force, stepping down to a 100 mm bore yields 3927 N push at 0.5 MPa. Selecting the SAIJ over a fixed SAI cylinder means you can dial in the exact retract position on the machine without swapping hardware.
When ordering, specify the 125 mm bore, 115 mm stroke, 50 mm adjustment range, PT port thread, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Note that the rear adjuster and air cushion decelerate the load but do not hold it; for true position holding without live air, consider the SAIL or BSAI series.
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 SAIJ125AX115-50S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw lets you shorten the effective stroke by up to 50 mm. This creates a usable travel window between 65 and 115 mm, allowing you to set the exact retract position during commissioning. The adjuster acts as a stop and does not lock the load without live air pressure.
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