This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X200FA, 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 SI50 Standard Cylinder SI50X200FA
The AirTAC Airtac SI50 Standard Cylinder SI50X200FA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X200FA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X200FA
- 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 SI50 Standard Cylinder SI50X200FA
The AirTAC SI50X200FA is a discontinued double-acting ISO 15552 profile cylinder featuring a 50mm bore, 200mm stroke, and FA flange mounting. It delivers 982N push force at 0.5MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X200FA, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. This SKU lacks the -S magnet, so it cannot accept a CS1-B/DS1-B sensor. If high temperatures are involved, Viton H seals raise the operating range to 150C.
Airtac SI50 Standard Cylinder SI50X200FA Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X200FA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X200FA |
| Bore size | Ø50 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X200FA carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X200FA produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X200FA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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 SI50 Standard Cylinder SI50X200FA Is Used
Clamp Actuation
Secures medium workpieces on machining fixtures using the 982N push force and 200mm stroke to position parts firmly for milling operations.
Package Diversion
Drives 50kg vertical lift diverters on packaging lines, utilizing the FA flange mount to handle repetitive routing tasks without live load holding.
Pallet Stops
Acts as a pneumatic stop gate for roller conveyors, relying on the 825N pull force to retract the barrier and allow pallet flow.
Replacing the Airtac SI50 Standard Cylinder SI50X200FA with the SAI50X200FA
To replace the SI50X200FA, order the SAI50X200FA. Verify the FA flange interface, 50mm bore, 200mm stroke, G1/4 port, and M16x1.5 rod thread. Because this specific SKU has no -S suffix, it cannot support magnetic sensing; order a magnet-equipped SAI variant if switches are needed. For sizing, the 50mm bore yields 982N push at 0.5MPa; dropping to a 40mm bore gives 628N, while a 63mm bore provides 1559N. Note that a plain cylinder drifts on air loss—the cushion only decelerates the stroke. For load holding, specify an external pilot check valve, or choose the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X200FA
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X200FA FAQ
Yes, the SI50X200FA is discontinued. The direct replacement is the SAI50X200FA. It matches the ISO 15552 mounting interface, 50mm bore, 200mm stroke, output force, G1/4 port, and FA flange, fitting existing fixtures perfectly.
The G1/4 port feeds a 50mm bore generating 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. It operates at 30-800mm/s with a 30mm adjustable air cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X200FA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X200FA replacement — usually within 7-8 hours.