This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX250, 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 SI200BX250
The AirTAC Airtac SI200 Standard Cylinder SI200BX250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX250
- 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 SI200BX250
The AirTAC SI200BX250 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 250 mm stroke. It delivers 15708 N push and 15080 N pull at 0.5 MPa, operating through a G3/4 port. AirTAC replaced this legacy unit with the SAI200BX250. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures seamlessly.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept a CS1-B/DS1-B sensor. The SAI family also introduces SAIL and BSAI lock variants absent in the SI line.
Airtac SI200 Standard Cylinder SI200BX250 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX250 |
| Bore size | Ø200 mm |
| Stroke | 250 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 SAI200BX250 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 SAI200BX250 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 SI200BX250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×250 | 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 SI200BX250 Is Used
Heavy Stamping
Drives large presses and stamping dies requiring up to 28274 N of thrust at 0.9 MPa.
Clamping Fixtures
Secures large fabricated components during machining with a robust 15708 N push force.
Replacing the Airtac SI200 Standard Cylinder SI200BX250 with the SAI200BX250
To replace the SI200BX250, order the SAI200BX250. Verify your ISO 15552 mounting interface (LB, FA, FB, CA, CB, TC), the 250 mm stroke, and the G3/4 port. Because this SKU has no magnet, it cannot support position sensing; if switches are needed, select an SAI200BX250S and use current AirTAC sensors. Sizing checks: a 160 mm bore yields 10053 N push at 0.5 MPa, while a 200 mm bore hits 21991 N at 0.7 MPa. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. For any stroke over 300 mm, guide the load to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX250
- ✓ 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 SI200BX250 FAQ
Yes, the SI200BX250 is discontinued. The direct replacement is the AirTAC SAI200BX250. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 250 mm stroke, force, G3/4 port, and mounting accessories.
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. It operates at 30-500 mm/s with a 50 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX250
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX250 replacement — usually within 7-8 hours.