This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X420H, 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 SI200X420H
The AirTAC SI200 Standard Cylinder SI200X420H 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 SAI200X420H, 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 → SAI200X420H
- 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 SI200X420H
The AirTAC SI200X420H is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 420mm stroke. Built with an extruded aluminum barrel and adjustable air cushions, it delivers 15708 N push force at 0.5 MPa. Because this SI unit is end-of-life, you should order the direct replacement: the SAI200X420H. It shares the same ISO 15552 mounting interface, G3/4 port, M36x2 rod thread, and 3204 kgf maximum force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. It uses the Viton H seal, raising operating temperature to 0-150 C.
Airtac SI200 Standard Cylinder SI200X420H Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X420H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X420H |
| 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 SAI200X420H 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 SAI200X420H 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 SI200X420H
| 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 SI200X420H Is Used
Heavy Press Stamping
Drives large metal forming presses requiring high thrust, using the 21991 N push force at 0.7 MPa to deform thick plate steel.
High-Temp Ejection
Ejects molded parts from hot environments using the Viton H seal, which sustains 0 to 150 C without degrading.
Replacing the Airtac SI200 Standard Cylinder SI200X420H with the SAI200X420H
To replace the SI200X420H, order the SAI200X420H. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G3/4 port, and the M36x2 rod thread. Because this is a no-S SKU, it cannot support legacy CS1-B/DS1-B sensors; you must use external sensing. If you need to hold a load without live air, note that the cushion only decelerates; you will need an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. With a 420mm stroke, prevent rod bending by using an external guide to absorb side loads. If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa; if upsizing beyond 200mm, confirm fixture limits.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X420H
- ✓ 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 SI200X420H FAQ
Yes, the AirTAC SI200X420H is discontinued. The direct replacement is the SAI200X420H. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 200mm bore, 420mm stroke, G3/4 port, and output force.
This 200mm bore cylinder features a G3/4 air port. It generates 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical maximum force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X420H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X420H replacement — usually within 7-8 hours.