This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X200FTC, 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 SI50X200FTC
The AirTAC Airtac SI50 Standard Cylinder SI50X200FTC 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 SAI50X200FTC, 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 → SAI50X200FTC
- 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 SI50X200FTC
The AirTAC SI50X200FTC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions. It delivers 982 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50X200FTC, which matches the exact bore, stroke, force, port, and FTC trunnion mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. Note this SKU lacks a magnet, so it cannot take a CS1-B/DS1-B sensor.
Airtac SI50 Standard Cylinder SI50X200FTC Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X200FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X200FTC |
| 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 SAI50X200FTC 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 SAI50X200FTC 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 SI50X200FTC
| 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 SI50X200FTC Is Used
Package Diversion
Drives sorting arms on packaging lines where 982 N push at 0.5 MPa easily redirects standard cartons via the FTC trunnion mount.
Replacing the Airtac SI50 Standard Cylinder SI50X200FTC with the SAI50X200FTC
To replace the SI50X200FTC, order the SAI50X200FTC. Verify the ISO 15552 FTC trunnion mount, 50 mm bore, 200 mm stroke, and G1/4 port (PT/G/NPT thread options). Because this specific SKU has no -S magnet, it cannot support position sensing; order the SAI50X200FTCS if a switch is required. For sizing both ways, a 40 mm bore yields 628 N push at 0.5 MPa, while a 63 mm bore yields 1559 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant to hold loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X200FTC
- ✓ 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 SI50X200FTC FAQ
Yes, the AirTAC SI50X200FTC is discontinued. The direct replacement is the SAI50X200FTC. It is dimensionally interchangeable per ISO 15552, matching the 50 mm bore, 200 mm stroke, G1/4 port, force, and FTC trunnion mounting interface.
The G1/4 port is fixed by the 50 mm bore. Theoretical forces are 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a maximum force of 200 kgf at 1.0 MPa. The piston rod is 20 mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X200FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X200FTC replacement — usually within 7-8 hours.