This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X300STC, 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 SI200X300STC
The AirTAC SI200 Standard Cylinder SI200X300STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 300mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X300STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke300 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X300STC
- 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 SI200X300STC
The AirTAC SI200X300STC is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 300 mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200X300STC, retaining the exact ISO 15552 mounting interface, TC trunnion, stroke, and output force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL and BSAI lock variants the SI lacked. Rod options include carbon steel or SUS304, and the -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200X300STC Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X300STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X300STC |
| Bore size | Ø200 mm |
| Stroke | 300 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 SAI200X300STC 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 SAI200X300STC 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 SI200X300STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×300 | 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 SI200X300STC Is Used
Heavy Press Clamping
Generates up to 3204 kgf at 1.0 MPa to secure large steel fabrications during heavy-duty machining or welding operations.
Pallet Diversion
Uses the TC trunnion mount to articulate heavy pallets laterally across high-capacity material handling lines.
Bulk Lift Gates
Raises and lowers substantial loading bay gates, utilizing the 15708 N push force at 0.5 MPa for reliable vertical actuation.
Replacing the Airtac SI200 Standard Cylinder SI200X300STC with the SAI200X300STC
To replace the SI200X300STC, order the SAI200X300STC. Verify the ISO 15552 TC trunnion mount, 300 mm stroke, G3/4 port, and -S magnet for CS1-B/DS1-B sensors. Sizing both ways: a 160 mm bore yields 10053 N [email protected] MPa, while a 200 mm bore gives 21991 N [email protected] MPa. The 300 mm stroke requires external guides to prevent rod bending under side loads. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X300STC
- ✓ 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 SI200X300STC FAQ
Yes, the SI200X300STC is discontinued. The direct replacement is the SAI200X300STC, which matches the ISO 15552 mounting interface, 200 mm bore, 300 mm stroke, force, and G3/4 port.
The G3/4 port feeds a 200 mm bore yielding 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X300STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X300STC replacement — usually within 7-8 hours.