This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X95S, 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 SI125X95S
The AirTAC SI125 Standard Cylinder SI125X95S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 95mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X95S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke95 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X95S
- 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 SI125X95S
The AirTAC SI125X95S is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 95 mm stroke, delivering 6136 N push force at 0.5 MPa via a G1/2 port. It is replaced by the SAI125X95S.
The SAI direct keeps the exact ISO 15552 mounting interface, bore, stroke, force and port. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. The -S suffix means a piston magnet for CS1-B/DS1-B sensors.
Airtac SI125 Standard Cylinder SI125X95S Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X95S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X95S |
| Bore size | Ø125 mm |
| Stroke | 95 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 SAI125X95S 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 SAI125X95S 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 SI125X95S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×95 | 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 SI125X95S Is Used
Heavy Stamping Press
Drives heavy tooling in stamping presses where the 6136 N push force at 0.5 MPa easily overcomes die resistance and return springs.
Large Mold Clamping
Secures large injection molds or heavy industrial fixtures using the robust 32 mm piston rod and M27x2 thread.
Replacing the Airtac SI125 Standard Cylinder SI125X95S with the SAI125X95S
To replace the SI125X95S, order the SAI125X95S. Verify the ISO 15552 mounting interface, 95 mm stroke, G1/2 port (PT/G/NPT thread options), and mounting accessory. The -S magnet enables CS1-B/DS1-B switches; the SAI uses current AirTAC switches. For sizing, a 100 mm bore gives 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. This cylinder does not hold load without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Rod material options include carbon steel, SUS420J2 (A), and SUS304 (B); Viton H seals raise the temperature range to 0-150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X95S
- ✓ 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 SI125X95S FAQ
Yes, the SI125X95S is discontinued. The direct replacement is the SAI125X95S. It is dimensionally interchangeable per ISO 15552, maintaining the same bore, stroke, force, G1/2 port, and mounting interface, so it fits existing fixtures.
The 125 mm bore delivers 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X95S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X95S replacement — usually within 7-8 hours.