Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-75
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X325-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 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 SAIJ125X325-75
The AirTAC SAIJ125X325-75 is a double-acting, double-rod ISO 15552 profile cylinder engineered for heavy-duty applications requiring exact end-position tuning. This rear adjuster allows you to trim the retract distance during commissioning without swapping out the entire cylinder.
Built with a carbon steel rod and a G1/2 port, this extruded aluminum profile cylinder integrates variable air cushions at both ends to decelerate massive loads smoothly. The rear stopper mechanism acts purely as a travel end setter, not a load-holding lock, so live air pressure is always required to maintain position. It supports a narrower set of ISO 15552 mounting options—Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting the FB, CA, CB, and CR variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125X325-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125X325-75 Is Used
Variable End-Stop Machining
Dial in the exact 250-325mm retract distance for multi-stage machining operations without physically changing out cylinder hardware.
Product-Size Changeover
Quickly adapt a heavy-duty conveyor diverter or pusher to handle different package lengths by simply turning the rear adjustment screw.
Heavy Assembly Commissioning
Fine-tune the final seating position of large components during machine setup to prevent crushing forces and ensure perfect alignment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-75 the Right Cylinder?
The 75mm adjustment range is ideal for production lines running mixed product sizes, enabling rapid changeover by shifting the retract end-stop rather than mechanically repositioning the entire fixture. For holding loads safely without continuous air pressure, you must integrate an external pilot-operated check valve or choose a dedicated locking cylinder like the AirTAC SAIL or BSAI.
Because the 325mm stroke creates a long lever arm on the 32mm rod, external guide rails are strongly recommended to prevent excessive side-loading and premature seal wear. To match this exact ISO 15552 replacement, specify: 125mm bore, 325mm stroke, 75mm adjustment, PT tapered port thread, carbon steel rod, no magnet, and a supported mounting style from the SAIJ subset.
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 SAIJ125X325-75 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 75mm from the 325mm nominal length, creating a 250-325mm travel window. This stopper only sets the end position and does not lock the load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.