Airtac SAIJ125 Adjustable Cylinder SAIJ125BX140-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX140-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 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 SAIJ125BX140-40
The AirTAC SAIJ125X140-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 100 to 140 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads while allowing precise end-position tuning during commissioning without swapping out the cylinder. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant is configured with a SUS304 stainless steel rod for superior corrosion resistance and PT tapered port threads. It supports speeds of 30-500 mm/s and uses an adjustment subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB and CA options. The rear stopper fine-tunes the retract position but does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX140-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX140-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125BX140-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125BX140-40 Is Used
Product Changeover
Dial in the 100-140 mm retract window during packaging line format changes to accommodate different carton depths instantly.
Machine Setup
Fine-tune the end-stop position during initial commissioning to perfect the pressing force without machining external spacers.
Heavy Clamping
Utilize the 6136 N push force to secure heavy workpieces, relying on the rear adjuster to set the exact clamp depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX140-40 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short, providing 3927 N of push force at 0.5 MPa compared to the 6136 N available here. The 40 mm adjustment window is ideal for product-size changeovers on a line, letting you dial in the exact retract distance without adding external stops. For load-holding without continuous air pressure, pair this cylinder with an external rod lock or select an AirTAC SAIL or BSAI model instead of relying on the adjuster.
When replacing an ISO 15552 cylinder, verify the 125 mm bore, 140 mm stroke, up to 40 mm adjustment, PT ports, and the specific mounting subset. Because the stroke is under 300 mm, side-load stress is minimized, but you should still ensure the 32 mm rod and M27x2 thread are properly aligned to maximize bearing life.
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 SAIJ125BX140-40 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 achieves a push force of 11045 N.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 140 mm stroke by up to 40 mm, creating a usable travel window of 100 to 140 mm. It only sets the travel end and does not hold the load without live air pressure.
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Standard models are processed and dispatched in 3-5 business days.
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