Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-75S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X140-75S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- 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 SAIJ125X140-75S
Its integrated -S magnet pairs directly with CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded aluminum barrel grooves for precise end-position detection. This model uses a carbon steel rod and PT tapered port threads.
Featuring a 140mm nominal stroke, the external rear adjusting screw provides a 75mm trim range, creating a flexible 65-140mm usable travel window. This built-in adjuster acts purely as a mechanical stop to set the retract end-position and relies on the variable air cushions for deceleration; it does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-75S |
|---|---|
| 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-75S
| 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 SAIJ125X140-75S Is Used
Product Changeover
Dial in the 65-140mm travel window during format size changes on packaging lines without physically swapping out the actuator.
End-Stop Tuning
Fine-tune the retract position at machine commissioning to perfect a pressing operation, using the rear stop instead of external shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X140-75S the Right Cylinder?
The 75mm adjustment range is ideal for production lines running multiple product sizes, allowing operators to fine-tune the retract end-stop during changeover without swapping the cylinder or adding external stops. If fixed end-positions are sufficient, a standard SAI cylinder offers a simpler setup.
To match this ISO 15552 footprint for a direct replacement, verify the 140mm stroke, 75mm adjustment amount, PT G1/2 port, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 32mm rod and M27x2 rod thread handle substantial loads, long unsupported strokes still require an external guide to prevent side-loading damage.
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 SAIJ125X140-75S FAQ
The 140mm nominal stroke can be mechanically shortened by up to 75mm via a rear adjusting screw, creating a usable travel window of 65-140mm. This stopper sets the retract end-position but does not lock the load without live air pressure.
The maximum thrust is 1251 kgf at 1.0 MPa.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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