This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX450, 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 SI200BX450
The AirTAC Airtac SI200 Standard Cylinder SI200BX450 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 SAI200BX450, 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 → SAI200BX450
- 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 SI200BX450
The AirTAC SI200BX450 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 450 mm stroke. It delivers 15708 N push and 15080 N pull at 0.5 MPa, utilizing a G3/4 port and M36x2 rod thread. The direct replacement is the SAI200BX450, matching the exact ISO 15552 mounting interface, bore, stroke, force, and port size for seamless fixture integration.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. For load holding, the air cushion only decelerates; use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI200 Standard Cylinder SI200BX450 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX450 |
| 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 SAI200BX450 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 SAI200BX450 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 SI200BX450
| 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 SI200BX450 Is Used
Heavy Press Operations
Drives large forming and stamping presses requiring up to 21991 N of thrust at 0.7 MPa, utilizing the 200 mm bore for high-force metal deformation.
Industrial Clamp Systems
Secures massive components during machining or welding, providing 15080 N pull force at 0.5 MPa to hold large steel assemblies firmly in place.
Replacing the Airtac SI200 Standard Cylinder SI200BX450 with the SAI200BX450
To replace the SI200BX450, order the SAI200BX450 direct. Verify the ISO 15552 mounting interface, 450 mm stroke, G3/4 port (PT/G/NPT thread options), and mounting accessory. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, select an SAI200BX450S model and use current AirTAC switches. Sizing both ways: stepping down to a 160 mm bore yields 10053 N push at 0.5 MPa, while this 200 mm bore provides 21991 N at 0.7 MPa. A plain cylinder drifts on air loss—the cushion only decelerates—so for held loads use an external pilot check valve or the SAIL/BSAI lock variant. With a 450 mm stroke, prevent rod bending by using external guides to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX450
- ✓ 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 SI200BX450 FAQ
Yes, the AirTAC SI200BX450 is discontinued. The direct replacement is the SAI200BX450. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 450 mm stroke, output force, G3/4 port, and mounting interface to fit existing fixtures directly.
This double-acting cylinder features a G3/4 port and M36x2 rod thread. It delivers 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 SAI200BX450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX450 replacement — usually within 7-8 hours.