This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X450S, 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 SI200X450S
The AirTAC SI200 Standard Cylinder SI200X450S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 450mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X450S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke450 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X450S
- 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 SI200X450S
The AirTAC SI200X450S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 450 mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the direct replacement SAI200X450S, sharing the exact mounting, bore, and force. The SAI upgrades the piston seal with two Y-shaped elements for low start-up pressure, and adds SAIL and BSAI lock variants the SI lacked.
The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors. Note that air cushions only decelerate; use an external rod lock or pilot check valve for load holding on air loss.
Airtac SI200 Standard Cylinder SI200X450S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X450S |
| Bore size | Ø200 mm |
| Stroke | 450 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 SAI200X450S 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 SAI200X450S 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 SI200X450S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×450 | 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 SI200X450S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N push force at 0.5 MPa with robust ISO 15552 mounting.
Large Mold Clamping
Secures heavy industrial molds in place, requiring an external rod lock or SAI clamp-lock variant to hold position safely.
Replacing the Airtac SI200 Standard Cylinder SI200X450S with the SAI200X450S
To replace the SI200X450S, order the SAI200X450S. It drops into existing fixtures via the exact ISO 15552 mounting interface, matching the 200 mm bore, 450 mm stroke, M36x2 rod thread, and G3/4 port. Confirm your mounting accessory (LB, FA, TC) and the -S magnet for current AirTAC switches. If you need less force, step down to bore 160 (10053 N push @0.5 MPa); if you need more, note 200 mm is the largest standard size. The plain cylinder does not hold load without live air, so for vertical applications consider the SAIL or BSAI lock variants, or an external pilot check valve. At 450 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X450S
- ✓ 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 SI200X450S FAQ
Yes, the SI200X450S is discontinued. The direct replacement is the SAI200X450S. It shares the identical ISO 15552 mounting interface, 200 mm bore, 450 mm stroke, output force, and G3/4 port, so it fits existing fixtures perfectly.
It features a G3/4 port and provides 15708 N push / 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X450S replacement — usually within 7-8 hours.