This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX40S, 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 SI200BX40S
The AirTAC SI200 Standard Cylinder SI200BX40S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 40mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX40S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke40 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX40S
- 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 SI200BX40S
The AirTAC SI200BX40S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 40mm stroke. Built for heavy-duty tasks, it delivers 15708 N push force at 0.5 MPa. The direct replacement is the SAI200BX40S, matching the bore, stroke, force, G3/4 port, and mounting fixtures. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. It also adds SAIL and BSAI lock variants absent in the SI line. This specific unit includes a -B SUS304 stainless piston rod for corrosion resistance and an -S magnet for legacy CS1-B/DS1-B sensors.
The SAI replacement is dimensionally interchangeable per ISO 15552, dropping directly into existing setups without mechanical changes. Note that a plain cylinder does not hold load without live air; the 50mm adjustable cushions only decelerate near stroke ends. For secure holding, use an external rod lock or pilot check valve.
Airtac SI200 Standard Cylinder SI200BX40S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX40S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX40S |
| Bore size | Ø200 mm |
| Stroke | 40 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 SAI200BX40S 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 SAI200BX40S 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 SI200BX40S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×40 | 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 SI200BX40S Is Used
Heavy Metal Forming
Drives large presses and stamping fixtures requiring high thrust, utilizing the 15708 N push force at 0.5 MPa to form thick steel plates.
Mold Clamping Stations
Secures heavy injection molds or cast components during processing, relying on the 40mm stroke for rapid, high-force clamping cycles.
Replacing the Airtac SI200 Standard Cylinder SI200BX40S with the SAI200BX40S
To replace the discontinued SI200BX40S, order the SAI200BX40S. Verify your ISO 15552 mounting interface, 200mm bore, 40mm stroke, G3/4 port, and mounting accessory. This unit has a -B SUS304 stainless rod and -S magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches. If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa. If upsizing is impossible, this 200mm bore hits 21991 N at 0.7 MPa. Because the stroke is under 300mm, rod-bending side loads are minimal, but always guide the load. For load holding on air loss, select the SAIL or BSAI lock variant, or use a pilot check valve, as standard cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX40S
- ✓ 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 SI200BX40S FAQ
Yes, the SI200BX40S is discontinued. The direct replacement is the SAI200BX40S. It features the same ISO 15552 mounting interface, 200mm bore, 40mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
The 200mm bore features a G3/4 air port and a 40mm rod. 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 max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX40S replacement — usually within 7-8 hours.