This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X50SN, 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 SI200X50SN
The AirTAC SI200 Standard Cylinder SI200X50SN 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 SAI200X50SN, 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 → SAI200X50SN
- 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 SI200X50SN
The AirTAC SI200X50SN is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 50mm stroke. Delivering 15708 N push force at 0.5 MPa through a G3/4 port, it is replaced by the direct replacement SAI200X50SN. This successor shares the exact mounting interface, bore, stroke, force, and port size, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the -N NBR seal handles -20 to +70 C (Viton H raises this to 150 C). For load holding, note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant.
Airtac SI200 Standard Cylinder SI200X50SN Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X50SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X50SN |
| 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 SAI200X50SN 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 SAI200X50SN 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 SI200X50SN
| 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 SI200X50SN Is Used
Heavy Press Clamping
Generates 15708 N at 0.5 MPa to secure large steel plates during machining or welding operations.
Pallet Lift Ejection
Provides the robust 801 kg vertical lift capacity needed to eject heavy loaded pallets from conveyors.
Industrial Mold Separation
Applies high breaking force to separate large injection molds, utilizing the 50mm stroke for rapid cycles.
Replacing the Airtac SI200 Standard Cylinder SI200X50SN with the SAI200X50SN
To replace the SI200X50SN, order the SAI200X50SN. Verify the ISO 15552 mounting interface, 200mm bore, 50mm stroke, G3/4 port (PT/G/NPT thread), and mounting accessory. The -S magnet enables CS1-B/DS1-B sensors (SAI uses current AirTAC switches). Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore hits 21991 N at 0.7 MPa. This plain cylinder does not hold load without live air; cushions only decelerate. For secure holding, use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. The 40mm rod and M36x2 thread manage the 3204 kgf max force.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X50SN
- ✓ 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 SI200X50SN FAQ
Yes, the SI200X50SN is discontinued. The direct replacement is the SAI200X50SN. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 50mm stroke, 15708 N force, and G3/4 port for a seamless fixture upgrade.
The 200mm bore delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. It uses a G3/4 port and a 40mm rod with an M36x2 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X50SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X50SN replacement — usually within 7-8 hours.