This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X480S, 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 SI125X480S
The AirTAC SI125 Standard Cylinder SI125X480S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 480mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X480S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke480 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X480S
- 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 SI125X480S
The AirTAC SI125X480S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 480 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI125X480S, matching the bore, stroke, force, port, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line.
Airtac SI125 Standard Cylinder SI125X480S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X480S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X480S |
| Bore size | Ø125 mm |
| Stroke | 480 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 SAI125X480S 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 SAI125X480S 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 SI125X480S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×480 | 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 SI125X480S Is Used
Heavy Pressing
Applies 6136 N of thrust at 0.5 MPa for securing heavy structural components or actuating large industrial presses.
Pallet Diversion
Uses the 480 mm stroke to push heavy pallets sideways onto secondary packaging lines without external extensions.
Replacing the Airtac SI125 Standard Cylinder SI125X480S with the SAI125X480S
To replace the SI125X480S, order the SAI125X480S. Verify the ISO 15552 mounting interface, G1/2 port, M27x2 rod thread, and the -S magnet for CS1-B/DS1-B sensors. If you need less force, the 100 mm bore yields 3927 N push at 0.5 MPa; if you need more, the 160 mm bore yields 10053 N. Because the 480 mm stroke is long, use an external guide to prevent rod bending and side loads. A plain cylinder does not hold load on air loss; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X480S
- ✓ 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 SI125X480S FAQ
Yes, the SI125X480S is discontinued. The direct replacement is the SAI125X480S. It features the same ISO 15552 mounting interface, 125 mm bore, 480 mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
The G1/2 port bore delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical maximum force is 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X480S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X480S replacement — usually within 7-8 hours.