This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X200SCB, 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 SI125X200SCB
The AirTAC SI125 Standard Cylinder SI125X200SCB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 200mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X200SCB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke200 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X200SCB
- 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 SI125X200SCB
The AirTAC SI125X200SCB is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 200 mm stroke, delivering 6136 N push force at 0.5 MPa via its G1/2 port. It is replaced by the SAI125X200SCB. This direct successor shares the exact ISO 15552 mounting interface, M27x2 rod thread, and 40 mm cushions, fitting existing CB clevis fixtures seamlessly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock variants like the SAIL and BSAI that the legacy SI line lacked.
Airtac SI125 Standard Cylinder SI125X200SCB Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X200SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X200SCB |
| Bore size | Ø125 mm |
| Stroke | 200 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 SAI125X200SCB 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 SAI125X200SCB 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 SI125X200SCB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×200 | 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 SI125X200SCB Is Used
Heavy-Duty Pressing
Drives large stamping or forming tools requiring 6136 N of push force at 0.5 MPa, utilizing the 200 mm stroke to cycle robustly.
Bulk Material Diversion
Mounts via the CB clevis to pivot heavy structural diverters on high-throughput packaging and bulk material conveyor lines.
Replacing the Airtac SI125 Standard Cylinder SI125X200SCB with the SAI125X200SCB
To replace the SI125X200SCB, order the SAI125X200SCB. Verify your ISO 15552 interface, 125 mm bore, 200 mm stroke, G1/2 port, and CB clevis mounting accessory. The -S magnet equates to legacy CS1-B/DS1-B sensors, though the SAI replacement uses current AirTAC switches. If sizing up or down, neighboring bores (100 mm or 160 mm) offer different force envelopes; at 0.5 MPa, this 125 mm bore yields 6136 N push and 5734 pull. Note that a standard cylinder drifts without live air—the cushion only decelerates. For load holding on air loss, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X200SCB
- ✓ 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 SI125X200SCB FAQ
Yes, the SI125X200SCB is discontinued. The direct replacement is the SAI125X200SCB. It is dimensionally interchangeable per ISO 15552, retaining the same 125 mm bore, 200 mm stroke, G1/2 port, and CB mounting interface.
It features a G1/2 air port and M27x2 rod thread. Force output is 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, with a theoretical maximum of 1251 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X200SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X200SCB replacement — usually within 7-8 hours.