Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S
The AirTAC SAIJ125X165-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 125 to 165 mm usable travel window. Equipped with a SUS304 stainless steel rod, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa. The integrated magnet supports position sensing, while the PT tapered ports ensure secure pneumatic connections.
Instead of relying on fixed stops, the external adjusting screw allows you to fine-tune the retract end position during commissioning without swapping the cylinder. This extruded aluminum profile cylinder includes sensor grooves on both sides for flexible switch mounting. Remember that the rear adjuster acts strictly as a travel stop, not a lock, so it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125BX165-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125BX165-40S Is Used
Product Changeovers
Quickly adapt the 125-165 mm travel window for different sized parts on the same assembly line without physically replacing the actuator.
Machine Setup
Fine-tune the retract end position during initial commissioning to achieve precise mechanical alignment using the rear stopper screw.
Variable End Stops
Dial in the exact clamping depth for high-force operations, leveraging the 6136 N push force at 0.5 MPa safely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX165-40S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (2513 N push at 0.5 MPa) is insufficient but a 160 mm bore (10053 N) would be excessive. The 40 mm adjustment range is ideal for product changeovers on a line, letting you dial in the exact end-stop without adding external stops. For load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead.
As a dimensionally interchangeable ISO 15552 cylinder, replacement requires matching the 125 mm bore, 165 mm stroke, 40 mm adjustment, PT ports, and the -S magnet. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the stroke is 165 mm, ensure external guides are used if the application involves significant side loading.
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 SAIJ125BX165-40S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm from the 165 mm nominal length, providing a usable travel window of 125 to 165 mm. It functions as a mechanical stop and does not lock the load without air pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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