This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX185S, 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 SI200AX185S
The AirTAC SI200 Standard Cylinder SI200AX185S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 185mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX185S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke185 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX185S
- 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 SI200AX185S
The AirTAC SI200AX185S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200mm bore, 185mm stroke, and a SUS420J2 stainless steel rod. It delivers 15708 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI200AX185S, a direct replacement sharing the exact ISO 15552 mounting interface, G3/4 port, and M36x2 rod thread.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI family expands options with SAIL, SAIF, and BSAI lock variants.
Airtac SI200 Standard Cylinder SI200AX185S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX185S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX185S |
| Bore size | Ø200 mm |
| Stroke | 185 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 SAI200AX185S 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 SAI200AX185S 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 SI200AX185S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×185 | 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 SI200AX185S Is Used
Heavy Stamping
Drives large press beds and heavy-duty stamping dies requiring up to 21991 N of thrust at 0.7 MPa.
Pallet Handling
Indexes loaded pallets on high-capacity conveyor lines, safely moving masses near the 801 kg vertical limit.
Automated Assembly
Actuates massive industrial fixtures and clamps substantial structural components during heavy assembly.
Replacing the Airtac SI200 Standard Cylinder SI200AX185S with the SAI200AX185S
To replace the SI200AX185S, order the SAI200AX185S and verify your ISO 15552 mounting interface, G3/4 port, and M36x2 thread. The -S magnet and -A SUS420J2 rod carry over directly. If you need less force, the 160mm bore provides 10053 N push at 0.5 MPa; if more is required, you are at the maximum standard bore. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. With a 185mm stroke, side-load is minimal, but ensure guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX185S
- ✓ 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 SI200AX185S FAQ
Yes, the SI200AX185S is discontinued. The direct replacement is the SAI200AX185S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 185mm stroke, output force, G3/4 port, and mounting accessories.
This 200mm bore cylinder uses a G3/4 air port. It generates 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 SAI200AX185S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX185S replacement — usually within 7-8 hours.