This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX450S, 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 SI200BX450S
The AirTAC SI200 Standard Cylinder SI200BX450S 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 SAI200BX450S, 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 → SAI200BX450S
- 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 SI200BX450S
The AirTAC SI200BX450S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 450mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI200BX450S, a direct sharing the exact interface, bore, stroke, force, and mounting. The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -B rod option on this unit specifies a SUS304 stainless piston rod for corrosion resistance, while the -S denotes a piston magnet for legacy CS1-B/DS1-B sensors.
The SAI family also introduces lock variants the SI lacked, such as the SAIL and BSAI clamp-lock cylinders. Note that a plain cylinder drifts without live air; the cushion only decelerates near stroke end. For high-temperature environments up to 150 C, a Viton H seal option is available.
Airtac SI200 Standard Cylinder SI200BX450S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX450S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX450S |
| 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 SAI200BX450S 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 SAI200BX450S 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 SI200BX450S
| 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 SI200BX450S Is Used
Heavy Stamping Press
Drives large platens and heavy dies where the 21991 N push force at 0.7 MPa is required for deep draw and forming operations.
Pallet Lowering
Handles vertical descent of 800 kg payloads in automated storage systems, utilizing the adjustable 50mm air cushion for smooth end-of-stroke deceleration.
Large Mold Clamping
Secures substantial injection mold halves or heavy fabrication fixtures, relying on the SUS304 stainless rod for environmental resilience.
Replacing the Airtac SI200 Standard Cylinder SI200BX450S with the SAI200BX450S
To replace the SI200BX450S, order the SAI200BX450S. Verify the ISO 15552 mounting interface, 450mm stroke, G3/4 port (PT/G/NPT thread options), and your mounting accessory (LB, FA, TC, etc.). The -S suffix confirms the magnet is present for CS1-B/DS1-B switches; a no-S SKU cannot take a sensor. Sizing both ways: if downgrading to a 160mm bore yields 10053 N push at 0.5 MPa, upgrading to this 200mm bore provides 15708 N. Because the 450mm stroke exceeds 300mm, use an external guide to prevent rod bending and side-load damage. A plain SAI does not hold load on air loss; for secure holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX450S
- ✓ 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 SI200BX450S FAQ
Yes, the SI200BX450S is discontinued. The direct replacement is the SAI200BX450S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 450mm stroke, 15708 N force, G3/4 port, and mounting fixtures.
The 200mm bore features a G3/4 port and a 40mm rod. Force output is 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 of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX450S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX450S replacement — usually within 7-8 hours.