Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50
The AirTAC SAIJ125X150-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5MPa and provides a usable travel window of 100-150mm, letting you trim the nominal 150mm stroke by up to 50mm during commissioning. This prevents the need to swap the cylinder or bolt on external stops when aligning heavy loads.
Built with a SUS420J2 stainless steel rod and PT tapered ports, this extruded aluminum body omits tie-rods and includes sensor grooves on both sides. The rear adjuster acts purely as a travel stop for end-position tuning, meaning it will not hold the load without live air pressure. For position holding without pressure, an external rod lock or SAIL cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125AX150-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125AX150-50 Is Used
Product Size Changeovers
Dial in the 100-150mm travel window on the fly during packaging line format changes, using the rear screw to set new end positions without swapping hardware.
Heavy Load Positioning
Leverage the 6136N push force at 0.5MPa to move heavy assemblies, using the 50mm adjustment to fine-tune the final resting position during machine commissioning.
Assembly Press Fitting
Achieve precise mechanical stops for press operations. The PT tapered ports ensure leak-free high-volume air delivery for consistent 30-500mm/s cycling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-50 the Right Cylinder?
Select this 125mm bore when a 63mm bore (1559N at 0.5MPa) is insufficient but an 80mm bore (2513N at 0.5MPa) still leaves too little force margin. The 50mm adjustment range is ideal for product changeovers on a line, allowing the end-stop to be dialed back precisely without changing the cylinder. It uses PT tapered ports and a SUS420J2 stainless steel rod.
When replacing an ISO 15552 cylinder, match the 125mm bore, 150mm stroke, 50mm adjustment, PT port, and mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, explicitly omitting FB, CA, CB, and CR. Because the 150mm stroke is below 300mm, side-load stress is moderate, but external guides are still recommended for heavy lateral loads. The adjuster is a stop, not a lock; use a BSAI clamp-lock if load holding is needed.
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 SAIJ125AX150-50 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9MPa, the push force increases to 11045N.
The rear adjuster acts as a mechanical stop that shortens the effective travel from the nominal 150mm down to as little as 100mm. It allows end-position tuning without external stops, but it 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 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 SAIJ125AX150-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.