This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X230TC, 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 SI125X230TC
The AirTAC SI125 Standard Cylinder SI125X230TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 230mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X230TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke230 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X230TC
- 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 SI125X230TC
The AirTAC SI125X230TC is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 230 mm stroke. Delivering 6136 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI125X230TC. This direct successor matches the exact TC trunnion mounting, M27x2 rod thread, and 40 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-magnet SKU cannot hold a position sensor, and plain cylinders drift without air; explore SAIL or BSAI lock variants for rigid holding.
Airtac SI125 Standard Cylinder SI125X230TC Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X230TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X230TC |
| Bore size | Ø125 mm |
| Stroke | 230 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 SAI125X230TC 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 SAI125X230TC 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 SI125X230TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×230 | 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 SI125X230TC Is Used
Heavy Press Forming
Drives large stamping and forming dies requiring high thrust, using the 6136 N push force at 0.5 MPa to shape thick metal components reliably.
Automated Clamp Systems
Secures heavy workpieces on machining lines, utilizing the 230 mm stroke to clear large part profiles before applying clamping force.
Replacing the Airtac SI125 Standard Cylinder SI125X230TC with the SAI125X230TC
To replace the SI125X230TC, order the SAI125X230TC ensuring the ISO 15552 TC trunnion interface, 125 mm bore, 230 mm stroke, and G1/2 port match your fixture. This non-magnet version cannot accept a CS1-B/DS1-B sensor; if sensing is needed, specify an SAI model with the magnet option. For loads requiring holding on air loss, a standard cylinder drifts since cushions only decelerate—select the SAIL or BSAI lock variant, or add an external pilot check valve. Operating speed is 30-500 mm/s. If sizing up or down, neighbouring bores (100/160 mm) alter the 6136 N @0.5 MPa force class significantly.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X230TC
- ✓ 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 SI125X230TC FAQ
Yes, the SI125X230TC is discontinued. The direct replacement is the SAI125X230TC. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 230 mm stroke, G1/2 port, TC trunnion mount, and output force. You simply order the SAI equivalent for your existing fixtures.
This 125 mm bore cylinder features a G1/2 air port. The thrust ratings are 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 maximum force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X230TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X230TC replacement — usually within 7-8 hours.