This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X125, 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 SI200 Standard Cylinder SI200X125
The AirTAC SI200 Standard Cylinder SI200X125 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X125, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X125
- 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 SI200 Standard Cylinder SI200X125
The AirTAC SI200X125 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 125mm stroke, delivering 15708 N push force at 0.5 MPa via a G3/4 port. As an end-of-line product, it is replaced by the SAI200X125 direct equivalent, which matches the exact mounting interface, bore, output, and cushioning.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity, plus SAIL and BSAI lock variants absent from the SI line. Note this non-magnet SKU cannot accept a sensor.
Airtac SI200 Standard Cylinder SI200X125 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X125 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X125 |
| Bore size | Ø200 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI200X125 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø200mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 15708 N | 15080 N |
| 0.7 MPa | 21991 N | — |
| Max (@1.0 MPa) | 3204 kgf | |
The SAI200X125 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI200 Standard Cylinder SI200X125
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×125 | 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 SI200 Standard Cylinder SI200X125 Is Used
Heavy Stamping
Drives large presses and stamping dies requiring massive thrust, using the 21991 N output at 0.7 MPa to form thick plate metal.
Industrial Automation
Actuates heavy-duty automated machinery and material handling systems, benefiting from the robust 40mm rod and 30-500 mm/s speed range.
Replacing the Airtac SI200 Standard Cylinder SI200X125 with the SAI200X125
To replace the SI200X125, order the SAI200X125 direct cylinder, verifying the ISO 15552 mounting fixture, M36x2 rod thread, G3/4 port, and 50mm adjustable cushions. This non-magnet version cannot hold a switch; order a -S SAI if CS1-B/DS1-B sensing is required. Sizing both ways: the 160mm neighbor offers 10053 N [email protected], while this 200mm bore hits 21991 N at 0.7 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or SAIL/BSAI lock for holding. At 125mm stroke, side-load risks are low, but always guide the rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X125
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI200 Standard Cylinder SI200X125 FAQ
Yes, the SI200X125 is discontinued. The direct replacement is the SAI200X125, a current ISO 15552 cylinder that matches the 200mm bore, 125mm stroke, G3/4 port, and mounting interface.
It features a G3/4 air port and delivers 15708 N push / 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N at 0.9 MPa, and a 3204 kgf max at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X125
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X125 replacement — usually within 7-8 hours.