This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X482STC, 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 SI125X482STC
The AirTAC SI125 Standard Cylinder SI125X482STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 482mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X482STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke482 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X482STC
- 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 SI125X482STC
The AirTAC SI125X482STC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 482 mm stroke. It delivers 6136 N push force at 0.5 MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI125X482STC, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, and force.
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 adds lock and valve variants the SI lacked.
Airtac SI125 Standard Cylinder SI125X482STC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X482STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X482STC |
| Bore size | Ø125 mm |
| Stroke | 482 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 SAI125X482STC 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 SAI125X482STC 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 SI125X482STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×482 | 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 SI125X482STC Is Used
Heavy Press Staging
Ideal for positioning heavy steel blanks at 6136 N push force into large stamping presses using the TC trunnion mount.
Pallet Diversion
The 482 mm stroke provides ample travel to divert heavy industrial pallets across high-throughput conveyor lines.
Replacing the Airtac SI125 Standard Cylinder SI125X482STC with the SAI125X482STC
To replace the SI125X482STC, order the SAI125X482STC. Confirm the TC trunnion mount, G1/2 port, M27x2 rod thread, and the -S magnet for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). If sizing up or down, neighboring bores are 100 mm (3927 N [email protected]) and 160 mm (10053 N [email protected]). This 482 mm stroke requires external guides to prevent rod bending under side loads. The standard cylinder does not hold load without air; use SAIL or BSAI lock variants, or a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X482STC
- ✓ 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 SI125X482STC FAQ
Yes, the SI125X482STC is discontinued. The direct replacement is the SAI125X482STC. It shares the identical ISO 15552 mounting interface, 125 mm bore, 482 mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
It features a G1/2 air port. 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. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X482STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X482STC replacement — usually within 7-8 hours.