This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X95, 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 SI125X95
The AirTAC SI125 Standard Cylinder SI125X95 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 SAI125X95, 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 → SAI125X95
- 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 SI125X95
The AirTAC SI125X95 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. It is superseded by the SAI125X95 direct replacement, sharing the exact G1/2 port, M27x2 rod thread, and ISO 15552 mounting interface.
This 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 take a sensor, and plain cylinders drift without air; use the SAIL or BSAI lock variants for holding.
Airtac SI125 Standard Cylinder SI125X95 Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X95 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X95 |
| 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 SAI125X95 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 SAI125X95 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 SI125X95
| 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 SI125X95 Is Used
Heavy-Duty Stamping
Drives large press dies requiring 6136 N of thrust at 0.5 MPa, utilizing the 95 mm stroke for compact, high-force impact cycles.
Mold Clamping
Secures heavy injection molds via ISO 15552 mounting fixtures, relying on the 125 mm bore's 1251 kgf maximum theoretical force.
Replacing the Airtac SI125 Standard Cylinder SI125X95 with the SAI125X95
To replace the SI125X95, order the SAI125X95, confirming the ISO 15552 mounting interface, 125 mm bore, 95 mm stroke, G1/2 port, and thread type (PT/G/NPT). This SKU lacks a magnet, so it cannot accept a CS1-B/DS1-B sensor; order an -S version if position detection is needed. Sizing both ways: the 125 mm bore yields 6136 N push at 0.5 MPa, while the neighbouring 100 mm bore offers 3927 N. The 95 mm stroke is under the 300 mm threshold, so rod-bending side-load risks are minimal. For load holding on air loss, the cushion only decelerates; add an external pilot check valve or use the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X95
- ✓ 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 SI125X95 FAQ
Yes, the SI125X95 is discontinued. The direct replacement is the SAI125X95. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 95 mm stroke, G1/2 port, and mounting interface.
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa push is 8590 N, and at 0.9 MPa it is 11045 N. The theoretical max is 1251 kgf at 1.0 MPa, with an operating speed of 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X95
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X95 replacement — usually within 7-8 hours.