This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X800SCA, 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 SI125X800SCA
The AirTAC SI125 Standard Cylinder SI125X800SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 800mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X800SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X800SCA
- 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 SI125X800SCA
The AirTAC SI125X800SCA is a discontinued double-acting ISO 15552 profile cylinder with an 800 mm stroke and CA clevis mount. Delivering 6136 N push force at 0.5 MPa, it features a 32 mm rod, M27x2 thread, G1/2 port, and 40 mm cushions. The direct replacement is the SAI125X800SCA.
The SAI successor shares the same interface and force, adding an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. Note that plain cylinders drift without air; use the SAIL lock variant or external check valves to hold loads.
Airtac SI125 Standard Cylinder SI125X800SCA Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X800SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X800SCA |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAI125X800SCA 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 SAI125X800SCA 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 SI125X800SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SI125X800SCA Is Used
Heavy Material Lifts
Drives large pallet elevators and heavy material lifts where 6136 N of push force at 0.5 MPa easily manages vertical travel over the 800 mm range.
Automated Pressing
Provides steady actuation for automated pressing and stamping stations, utilizing the 125 mm bore to deliver consistent clamping force.
Bulk Package Diverting
Powers heavy-duty bulk package diverters and sorting gates on conveyor lines, relying on the CA clevis mount to handle pivoting loads.
Replacing the Airtac SI125 Standard Cylinder SI125X800SCA with the SAI125X800SCA
To replace the SI125X800SCA, order the SAI125X800SCA. Verify the ISO 15552 CA clevis mount, 125 mm bore, 800 mm stroke, G1/2 port, and the -S magnet for CS1-B/DS1-B sensors. Operating speed is 30-500 mm/s. For sizing alternatives, the neighboring 100 mm bore yields 3927 N push at 0.5 MPa, while the 160 mm bore provides 10053 N. Because this is an 800 mm stroke, use an external guide to prevent rod bending and side-load damage. The air cushion only decelerates; it does not hold position. For load holding on air loss, select the SAIL or BSAI lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X800SCA
- ✓ 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 SI125X800SCA FAQ
Yes, the SI125X800SCA is discontinued. The direct replacement is the SAI125X800SCA. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 800 mm stroke, CA mounting, G1/2 port, and 6136 N force.
This 125 mm bore cylinder features a G1/2 port, a 32 mm rod, and a 40 mm cushion. 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 SAI125X800SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X800SCA replacement — usually within 7-8 hours.