This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX50S, 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 SI200AX50S
The AirTAC Airtac SI200 Standard Cylinder SI200AX50S 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 SAI200AX50S, 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 → SAI200AX50S
- 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 SI200AX50S
The AirTAC SI200AX50S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200 mm bore and 50 mm stroke. Built with an extruded aluminum barrel, it delivers 15708 N push force at 0.5 MPa. The direct replacement is the SAI200AX50S, matching the bore, stroke, 3204 kgf max force, G3/4 port, and ISO 15552 mounting interface.
This SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -A suffix indicates a SUS420J2 stainless piston rod for corrosion resistance, while the -S suffix provides a magnet for legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX50S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX50S |
| 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 SAI200AX50S 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 SAI200AX50S 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 SI200AX50S
| 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 SI200AX50S Is Used
Heavy Pressing
Generates 21991 N at 0.7 MPa for seating large bearings and heavy structural assemblies in fabrication cells.
Stamping Forming
Delivers robust short-stroke impact energy for metal forming and stamping operations requiring high peak force.
Pallet Handling
Actuates heavy-duty lift gates and positioning stops in automated distribution hubs handling massive loads.
Replacing the Airtac SI200 Standard Cylinder SI200AX50S with the SAI200AX50S
To replace the SI200AX50S, order the SAI200AX50S ensuring the ISO 15552 mounting interface, 200 mm bore, 50 mm stroke, G3/4 port, and SUS420J2 rod are retained. When sizing both ways, consider neighboring bores: a 160 mm bore yields 10053 N push at 0.5 MPa, while this 200 mm bore provides 15708 N. For load holding, note that a plain cylinder drifts on air loss as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The 30-500 mm/s speed range and M36x2 rod thread remain unchanged.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX50S
- ✓ 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 SI200AX50S FAQ
Yes, the SI200AX50S is discontinued. The direct replacement is the SAI200AX50S, which is dimensionally interchangeable per ISO 15552 mounting-interface dimensions and retains the same 200 mm bore, 50 mm stroke, output force, G3/4 port, and mounting accessories.
The cylinder features a G3/4 air port and delivers a push force of 15708 N and pull of 15080 N at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max force of 3204 kgf at 1.0 MPa. It uses a M36x2 rod thread with a 50 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX50S replacement — usually within 7-8 hours.