This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX145S, 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 SI200AX145S
The AirTAC Airtac SI200 Standard Cylinder SI200AX145S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 145mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX145S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke145 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX145S
- 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 SI200AX145S
The AirTAC SI200AX145S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 145mm stroke. It delivers 15708 N push at 0.5 MPa and uses a G3/4 port. The direct replacement is the SAI200AX145S, matching the interface, force, and mounting.
This SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Your -A code specifies a SUS420J2 stainless rod, and -S adds a magnet for CS1-B/DS1-B switches.
Airtac SI200 Standard Cylinder SI200AX145S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX145S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX145S |
| Bore size | Ø200 mm |
| Stroke | 145 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 SAI200AX145S 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 SAI200AX145S 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 SI200AX145S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×145 | 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 SI200AX145S Is Used
Heavy Stamping
Drives large presses and stamping fixtures requiring 15708 N thrust at 0.5 MPa with a 145 mm stroke.
Pallet Handling
Shifts heavy loaded pallets on conveyors where the 200 mm bore provides the necessary push force.
Clamp Systems
Secures large fabricated components during machining using the robust SUS420J2 stainless rod.
Replacing the Airtac SI200 Standard Cylinder SI200AX145S with the SAI200AX145S
To replace the SI200AX145S, order the SAI200AX145S. Confirm the ISO 15552 mounting interface, 145mm stroke, G3/4 port, and mounting accessory. The SAI keeps the SUS420J2 stainless rod (-A) and magnet (-S). If you need more force, the next size up offers higher thrust; if less, check the 160mm bore. Note: a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Viton H seals raise the temp to 150 C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX145S
- ✓ 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 SI200AX145S FAQ
Yes, the SI200AX145S is discontinued. The direct replacement is the SAI200AX145S. It is dimensionally interchangeable per ISO 15552, keeping the same 200mm bore, 145mm stroke, G3/4 port, and mounting interface.
It uses a G3/4 port. The force ratings are: 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 max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX145S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX145S replacement — usually within 7-8 hours.