Airtac SAIJ125 Adjustable Cylinder SAIJ125BX80-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX80-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 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 SAIJ125BX80-40S
The AirTAC SAIJ125X80-40-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 40 to 80 mm, allowing you to dial back the nominal 80 mm stroke by up to 40 mm during machine setup. This bore size delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and a -S magnet for position sensing. It is compatible with AirTAC CMSE reed switches and DMSE solid-state sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the rear adjuster functions purely as a mechanical stop for end-position tuning, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX80-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX80-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125BX80-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125BX80-40S Is Used
Variable End Stops
Fine-tune the retraction point within the 40-80 mm window during commissioning to accommodate different material thicknesses without changing the cylinder.
Machine Changeover
Rapidly adjust the stroke length on product size changeovers, saving setup time and avoiding the need to bolt on external mechanical stops.
Corrosive Positioning
Leverage the SUS304 stainless steel rod for heavy-duty clamping or positioning tasks in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX80-40S the Right Cylinder?
Select this 125 mm bore cylinder when your application requires 6136 N of push force at 0.5 MPa (or 8590 N at 0.7 MPa). If your load demands less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa. The adjustable stroke is ideal for product changeovers where the exact end-of-stroke position varies, eliminating the need to physically swap cylinders or add external stops. Because the 80 mm stroke is relatively short, side-loading is minimal, but always ensure the load is guided. For applications requiring the cylinder to hold its position without live air pressure, consider the SAIL or BSAI locking cylinders instead. This model uses PT tapered port threads and supports the SAIJ mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125BX80-40S FAQ
At an operating pressure of 0.5 MPa, 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 acts as a mechanical stop that allows you to shorten the effective stroke from its nominal 80 mm down to a minimum of 40 mm, providing a 40-80 mm usable travel window. It only sets the end position and does not hold the load without live air pressure.
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