Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S
The AirTAC SAIJ125X160-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5 MPa. By turning the rear stopper screw, technicians can fine-tune the end-of-travel position without swapping out the cylinder, creating a precise 110-160 mm usable travel window from the 160 mm nominal stroke. This built-in adjustability is ideal for product changeovers on high-force production lines.
This model features a SUS420J2 stainless steel rod (option A) for enhanced durability against side loads, paired with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated magnet (-S) is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts solely as a travel stop to set deceleration, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAIJ125AX160-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SAIJ125AX160-50S Is Used
Machine Setup & Changeover
Dial in the exact end position during commissioning or product size transitions without fabricating new external mechanical stops.
Variable End-Stop Positioning
Utilize the 110-160 mm travel window to fine-tune the retract stroke for multi-format packaging or machining operations.
High-Force Position Tuning
Leverage the 6136N thrust capacity at 0.5 MPa while retaining the flexibility to adjust the stroke length on the factory floor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX160-50S the Right Cylinder?
Selecting this 125 mm bore makes sense when your application requires the 6136N thrust at 0.5 MPa, offering a step up from the 50 mm bore (982N) for heavier tooling. The adjustable stroke is chosen over a fixed SAI cylinder when you need variable end-stops for machine setup or accommodating different product sizes on the same line. To replicate this ISO 15552 replacement exactly, match the 125 mm bore, 160 mm stroke, 50 mm adjustment, PT ports, SUS420J2 rod, and -S magnet.
Because the nominal stroke is 160 mm, an external guide is recommended to support the load and prevent excessive side-loading on the rod. Remember that the rear adjuster and air cushions only manage travel ends; for true load-holding without live air pressure, specify an AirTAC SAIL lock or BSAI clamp-lock cylinder instead.
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 SAIJ125AX160-50S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach up to 8590N push force at 0.7 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm, providing a usable travel window of 110 to 160 mm. This stopper sets the travel end and deceleration point but does not lock or hold the load without continuous air pressure.
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