This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X370STC, 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 SI200X370STC
The AirTAC SI200 Standard Cylinder SI200X370STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 370mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X370STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke370 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X370STC
- 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 SI200X370STC
The AirTAC SI200X370STC is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 370mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the SAI200X370STC. This direct successor shares the exact ISO 15552 mounting interface, M36x2 thread, and 50mm cushions. The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure, and adds SAIL and BSAI lock variants the SI lacked.
The -S magnet supports CS1-B/DS1-B sensors, while Viton H seals raise operating temps to 150 C. Note that plain cylinders drift without live air; use a pilot check valve for holding.
Airtac SI200 Standard Cylinder SI200X370STC Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X370STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X370STC |
| Bore size | Ø200 mm |
| Stroke | 370 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 SAI200X370STC 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 SAI200X370STC 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 SI200X370STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×370 | 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 SI200X370STC Is Used
Heavy Press Stamping
Drives large forming presses requiring 15708 N of thrust at 0.5 MPa, utilizing the 370mm stroke to accommodate deep-draw tooling.
Large Mold Handling
Shifts substantial injection molds on production lines, relying on the 50mm adjustable air cushions to decelerate the 40mm rod smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200X370STC with the SAI200X370STC
To replace the SI200X370STC, order the SAI200X370STC ensuring the TC trunnion mount, G3/4 port, and -S magnet match your fixture. If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa; if upsizing is impossible, this 200mm bore hits 21991 N at 0.7 MPa. The 370mm stroke requires external guides to prevent rod bending under side loads. For load holding on air loss, add an external rod lock or pilot check valve, as cushions only decelerate. The SAI family also offers the SAIL air-released lock or BSAI clamp-lock variants if integrated holding is required.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X370STC
- ✓ 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 SI200X370STC FAQ
Yes, the SI200X370STC is discontinued. The direct replacement is the SAI200X370STC. It shares the same ISO 15552 mounting interface, 200mm bore, 370mm stroke, G3/4 port, and output force, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/4 port and delivers 15708 N push / 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. The bore is 200mm with a 40mm rod.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X370STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X370STC replacement — usually within 7-8 hours.