This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X75SCA, 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 SI125X75SCA
The AirTAC SI125 Standard Cylinder SI125X75SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 75mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X75SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X75SCA
- 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 SI125X75SCA
The AirTAC SI125X75SCA is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 75 mm stroke. Delivering 6136 N push force at 0.5 MPa, it features a CA clevis mount, G1/2 port, and adjustable 40 mm cushions. The direct replacement is the SAI125X75SCA, matching the bore, stroke, output, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. The -S magnet works with legacy CS1-B/DS1-B sensors, while Viton H seals extend heat to 150 C.
Airtac SI125 Standard Cylinder SI125X75SCA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X75SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X75SCA |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAI125X75SCA 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 SAI125X75SCA 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 SI125X75SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SI125X75SCA Is Used
Heavy Press Forming
Applies the 6136 N push force at 0.5 MPa for heavy-duty stamping, bending, and pressing tasks in metal fabrication lines.
Clamp Actuation
Utilizes the CA clevis mount to securely pivot and drive large machining clamps under high pressure cycles.
Replacing the Airtac SI125 Standard Cylinder SI125X75SCA with the SAI125X75SCA
To replace the SI125X75SCA, order the SAI125X75SCA. Verify the ISO 15552 CA clevis interface, 125 mm bore, 75 mm stroke, G1/2 port, and the -S magnet for CS1-B/DS1-B switches. If you need more force, the 160 mm bore offers 10053 N push at 0.5 MPa; if less is required, the 100 mm bore provides 3927 N. Note that a standard cylinder drifts without live air—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. Operating speed is 30-500 mm/s.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X75SCA
- ✓ 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 SI125X75SCA FAQ
Yes, the SI125X75SCA is discontinued. The direct replacement is the SAI125X75SCA. It shares the same ISO 15552 mounting interface, 125 mm bore, 75 mm stroke, G1/2 port, and CA clevis, fitting existing fixtures perfectly.
This 125 mm bore cylinder has a G1/2 air port. It 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 maximum force of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X75SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X75SCA replacement — usually within 7-8 hours.