Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S
The AirTAC SAIJ125X225-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you dial back the 225 mm nominal travel by up to 50 mm, creating a precise 175-225 mm usable window. It delivers a robust 6136 N pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides, and this -S variant includes a magnet for position detection.
This model is configured with a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and PT tapered port threads. The 32 mm rod and M27x2 thread provide high rigidity, while the 40 mm cushion stroke ensures smooth deceleration. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 225 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 SAIJ125AX225-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×225 | 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 SAIJ125AX225-50S Is Used
Variable End-Stop Machining
Dial in the exact clamping travel between 175 and 225 mm on the fly to accommodate different part sizes without changing out tooling.
Product Changeover Systems
Rapidly adjust the retract position during packaging line format changes, using the 50 mm rear stopper to set new physical limits instantly.
Heavy-Duty Machine Setup
Leverage the 6136 N pull force for robust positioning tasks while fine-tuning the final end-state during initial equipment commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX225-50S the Right Cylinder?
Choose this 125 mm bore when you need substantially more force than the 80 mm class offers, which provides 2268 N of pull at 0.5 MPa. The adjustable stroke is highly beneficial during machine commissioning or product changeovers, allowing you to fine-tune the end position without swapping out the cylinder or adding bulky external stops. For load-holding applications, note that the rear adjuster acts only as a travel stop and does not lock the load without live air; for true locking, consider the SAIL or BSAI series. When replacing an ISO 15552 cylinder, match the 125 mm bore, 225 mm stroke, 50 mm adjustment, PT ports, and -S magnet.
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 SAIJ125AX225-50S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 225 mm nominal stroke by up to 50 mm, providing a usable travel window of 175-225 mm. It sets the end position but does not lock the load without continuous air pressure.
At 0.5 MPa, it provides 6136 N of pull force and 5734 N of push force. At the maximum 1.0 MPa operating pressure, it can deliver up to 1251 kgf of push force.
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 SAIJ125AX225-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.