This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX50S, 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 SI200BX50S
The AirTAC Airtac SI200 Standard Cylinder SI200BX50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 50mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke50 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX50S
- 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 SI200BX50S
The AirTAC SI200BX50S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 50 mm stroke. It delivers 15708 N push and 15080 N pull at 0.5 MPa, peaking at 3204 kgf. The direct replacement is the SAI200BX50S, matching the G3/4 port, M36x2 thread, and ISO 15552 mounting interface. This SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure.
This unit includes a -S magnet for CS1-B/DS1-B legacy sensors and a -B SUS304 stainless piston rod for corrosion resistance. Note that standard cylinders drift on air loss; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI200 Standard Cylinder SI200BX50S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX50S |
| Bore size | Ø200 mm |
| Stroke | 50 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 SAI200BX50S 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 SAI200BX50S 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 SI200BX50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×50 | 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 SI200BX50S Is Used
Heavy Press Systems
Drives 200-ton hydraulic press tops or heavy stamping platens, utilizing the 21991 N push force at 0.7 MPa to form thick steel plates.
Massive Payload Lifts
Hoists 800 kg automotive chassis components vertically, safely operating within the 801 kg computed lift margin at 0.5 MPa.
Robotic Welding Jigs
Clamps large structural beams in automated welding lines, relying on the SUS304 stainless rod to resist weld spatter and coolant corrosion.
Replacing the Airtac SI200 Standard Cylinder SI200BX50S with the SAI200BX50S
To replace the discontinued SI200BX50S, order the SAI200BX50S. Confirm the ISO 15552 mounting interface, 50 mm stroke, G3/4 port, and your mounting accessory. The -S magnet enables current AirTAC switches, while the -B SUS304 rod handles harsh environments. If 15708 N at 0.5 MPa is excessive, a 160 mm bore offers 10053 N; if more force is needed, verify pressure limits. Because the cushion only decelerates, use an external rod lock or pilot check valve for load holding, or specify the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX50S
- ✓ 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 SI200BX50S FAQ
Yes, the SI200BX50S is discontinued. The direct replacement is the SAI200BX50S. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 50 mm stroke, G3/4 port, and mounting interface.
The G3/4 port feeds a 40 mm rod. It provides 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N at 0.9 MPa, and a maximum theoretical force of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX50S replacement — usually within 7-8 hours.