Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 450mm 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
- Stroke450 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50
The AirTAC SAIJ125X450-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel into a precise 400-450 mm window. It delivers substantial thrust, generating 8590 N of pull force at 0.7 MPa, making it well-suited for moving heavy loads. The piston rod is constructed from SUS420J2 stainless steel for enhanced durability against moisture, and it features PT tapered port threads for a reliable seal.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when fine-tuning end positions during machine commissioning. The rear adjuster acts strictly as a travel stop to set deceleration and end limits; it does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series, or an external rod lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 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 SAIJ125AX450-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×450 | 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 SAIJ125AX450-50 Is Used
Variable End-Position Stops
Dial in the exact 400-450 mm travel distance during setup to accommodate varying product lengths without physically replacing the actuator.
Machine Changeover
Quickly fine-tune the retract end-stop when switching production runs, saving downtime by adjusting the rear screw rather than re-engineering the fixture.
Heavy Load Handling
Leverage the 8590 N pull force at 0.7 MPa to shift heavy pallets or assemblies, using the rear stop to set precise deceleration limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX450-50 the Right Cylinder?
Choose this 125 mm bore when you need more force than a 100 mm bore provides (5497 N push at 0.7 MPa) but less than the massive 160 mm class (14074 N push). The 50 mm adjustment range is ideal for product-size changeovers on a line, allowing operators to dial in the exact end-stop without changing the cylinder. Because the nominal stroke is 450 mm, an external guide is recommended to prevent excessive side-loading on the rod.
To match this ISO 15552 cylinder as a replacement, verify the 125 mm bore, 450 mm stroke, 50 mm adjustment range, PT port threads, and the required mounting accessory (choose from Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that this unit lacks a magnet; add an -S suffix if you require CMSE reed or DMSE electronic sensor integration.
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 SAIJ125AX450-50 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder provides 8590 N of pull force and 11045 N of push force. It can reach a maximum push force of 1251 kgf at 1.0 MPa.
The rear adjusting screw acts as an external stopper, allowing you to shorten the 450 mm nominal stroke by up to 50 mm. This creates a usable travel window of 400-450 mm for fine-tuning end positions at commissioning.
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 SAIJ125AX450-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.