This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX55S, 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 SI200AX55S
The AirTAC Airtac SI200 Standard Cylinder SI200AX55S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX55S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX55S
- 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 SI200AX55S
The AirTAC SI200AX55S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 55mm stroke. Delivering 15708 N push force at 0.5 MPa, it features a G3/4 air port, M36x2 rod thread, and a 50mm adjustable air cushion. The direct replacement is the SAI200AX55S, matching the exact ISO 15552 mounting interface, bore, force, and port. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life.
This specific unit includes the -S magnet for legacy CS1-B/DS1-B sensors and the -A SUS420J2 stainless steel rod for corrosion resistance. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI200 Standard Cylinder SI200AX55S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX55S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX55S |
| Bore size | Ø200 mm |
| Stroke | 55 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 SAI200AX55S 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 SAI200AX55S 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 SI200AX55S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×55 | 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 SI200AX55S Is Used
Heavy Press Clamping
Generates 15708 N at 0.5 MPa to secure large steel fabrications during heavy industrial pressing and machining operations.
Stamping Press Feed
Drives heavy-duty feeding mechanisms in stamping lines, utilizing the 50mm adjustable cushion to decelerate massive payloads smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200AX55S with the SAI200AX55S
To replace the SI200AX55S, order the SAI200AX55S. Confirm the ISO 15552 mounting interface, 200mm bore, 55mm stroke, G3/4 port (PT/G/NPT thread), and mounting accessory. The -S magnet enables current AirTAC switches, replacing legacy CS1-B/DS1-B sensors, while the -A rod specifies SUS420J2 stainless steel. If sizing up or down, evaluate neighbouring bores and the 21991 N push force at 0.7 MPa. Because a plain cylinder drifts on air loss and the cushion only decelerates, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX55S
- ✓ 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 SI200AX55S FAQ
Yes, the AirTAC SI200AX55S is discontinued. The direct replacement is the SAI200AX55S. It shares the identical ISO 15552 mounting interface, 200mm bore, 55mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly.
The SI200AX55S features a G3/4 air port. It delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, and a theoretical maximum force of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX55S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX55S replacement — usually within 7-8 hours.