This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X560S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI125 Standard Cylinder SI125X560S
The AirTAC SI125 Standard Cylinder SI125X560S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 560mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X560S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke560 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X560S
- 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 SI125 Standard Cylinder SI125X560S
The AirTAC SI125X560S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 560 mm stroke. Delivering 6136 N push force at 0.5 MPa, it features a G1/2 port, M27x2 rod thread, and a magnetic piston for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI125X560S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent from the SI line, while rod material options include carbon steel, SUS420J2, or SUS304.
Airtac SI125 Standard Cylinder SI125X560S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X560S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X560S |
| Bore size | Ø125 mm |
| Stroke | 560 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125X560S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI125X560S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X560S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×560 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI125 Standard Cylinder SI125X560S Is Used
Heavy Stamp Pressing
Drives large stamping dies and metal forming tools where 6136 N of thrust at 0.5 MPa is required for deep draw operations.
Bulk Material Diversion
Actuates heavy-duty diverter gates on high-capacity conveyor lines, utilizing the 125 mm bore for high force over long strokes.
Replacing the Airtac SI125 Standard Cylinder SI125X560S with the SAI125X560S
To replace the SI125X560S, order the SAI125X560S ensuring the ISO 15552 mounting interface, 125 mm bore, 560 mm stroke, and G1/2 port match your fixture. Retain your original mounting accessory and confirm the -S magnet for current AirTAC switch compatibility. If sizing up or down, neighboring bores are 100 mm and 160 mm; at 0.5 MPa this 125 mm bore provides 6136 N push and 5734 N pull force. Because the 560 mm stroke is long, use an external guide to prevent rod bending and side-load damage. A standard cylinder drifts without live air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X560S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X560S FAQ
Yes, the SI125X560S is discontinued. The direct replacement is the AirTAC SAI125X560S. It shares the identical ISO 15552 mounting interface, 125 mm bore, 560 mm stroke, G1/2 port, and output force, fitting directly into existing fixtures.
This double-acting cylinder operates at 0.15-1.0 MPa (proof 1.5 MPa) with a speed of 30-500 mm/s. Force output is 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical max of 1251 kgf at 1.0 MPa. It has a 40 mm adjustable cushion at each end and uses a G1/2 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X560S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X560S replacement — usually within 7-8 hours.