Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75
The AirTAC SAIJ125X145-75 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical stopper, allowing you to fine-tune the effective travel down from the 145mm nominal stroke to a 70-145mm usable window. It delivers a robust 6136N pull force at 0.5 MPa, making it well-suited for heavy positioning tasks. The carbon steel piston rod features an M27x2 thread, providing a strong mechanical interface for high side-load endurance.
Because the adjustment mechanism acts solely as a travel stop, it cannot hold the load without continuous live air pressure. For fail-safe load holding, you would need to specify a SAIL pneumatic lock or an external pilot-operated check valve. This model uses a PT G1/2 port and operates at a slower 30-500 mm/s speed range, which helps manage the kinetic energy of its large bore during end-of-stroke deceleration.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125X145-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125X145-75 Is Used
Variable End Stops
Dial in the exact 70 to 145mm extension during machine setup to accommodate new product dimensions without changing the cylinder.
Heavy Forming Positioning
Leverage the 6136N pull force to move heavy tooling into place, using the rear stopper to prevent over-travel and ensure precise final placement.
Changeover Optimization
Speed up production line format changes by adjusting the rear stopper on the fly, eliminating the need to physically swap out pneumatic hardware.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75 the Right Cylinder?
Choose this 125mm bore if your application requires significantly more thrust than the 80mm option (which provides 2268N pull at 0.5 MPa), but less than the massive 160mm class. The 75mm adjustable window is particularly valuable on packaging or forming lines where product sizes change frequently, letting operators dial in the exact end position during commissioning without swapping out the physical cylinder.
When replacing an ISO 15552 cylinder, verify the 125mm bore, 145mm stroke, up to 75mm adjustment, PT G1/2 port, and your required mounting bracket from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this series. Since the stroke is under 300mm, side-load stress on the M27x2 rod is moderate, though an external guide is still recommended for heavy off-center loads.
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 SAIJ125X145-75 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from 145mm down to 70mm. It is a travel stop only, not a lock, so the cylinder still requires live air to hold the load.
At 0.5 MPa, it provides 6136N of push force and 5734N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 1251 kgf of thrust.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X145-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.