This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X420, 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 SI200X420
The AirTAC SI200 Standard Cylinder SI200X420 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 420mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X420, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke420 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X420
- 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 SI200X420
The AirTAC SI200X420 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 420mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI200X420, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, force, port and mounting fixtures.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. For high heat, Viton H seals raise the temperature range to 0-150 C.
Airtac SI200 Standard Cylinder SI200X420 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X420 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X420 |
| Bore size | Ø200 mm |
| Stroke | 420 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 SAI200X420 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 SAI200X420 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 SI200X420
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×420 | 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 SI200X420 Is Used
Heavy Stamp Presses
Drives large metal forming presses requiring 21991 N push at 0.7 MPa to actuate heavy tooling beds.
Large Gate Valves
Actuates massive industrial fluid gates where a 420mm stroke and 50mm cushions absorb heavy end impacts.
Replacing the Airtac SI200 Standard Cylinder SI200X420 with the SAI200X420
To replace the SI200X420, order the SAI200X420. Confirm the ISO 15552 mounting interface, 420mm stroke, M36x2 rod thread, and G3/4 port (PT/G/NPT). Since this SKU has no magnet, it cannot take CS1-B/DS1-B sensors. For sizing, the 160mm neighbor bore yields 10053 N [email protected], while stepping up is unnecessary as this bore hits 3204 kgf max force at 1.0 MPa. At 420mm stroke, use external guides to prevent rod bending under side loads. The cushion only decelerates; it does not hold load. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X420
- ✓ 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 SI200X420 FAQ
Yes, the AirTAC SI200X420 is discontinued. The direct replacement is the SAI200X420. It shares the same ISO 15552 mounting interface, 200mm bore, 420mm stroke, output force, G3/4 port, and mounting accessories, fitting directly into existing fixtures.
The G3/4 port bore delivers 15708 N push and 15080 N pull at 0.5 MPa. At 0.7 MPa push is 21991 N, at 0.9 MPa it is 28274 N, and the theoretical max force is 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X420
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X420 replacement — usually within 7-8 hours.