This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X350STC, 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 SI200X350STC
The AirTAC SI200 Standard Cylinder SI200X350STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 350mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X350STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke350 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X350STC
- 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 SI200X350STC
The AirTAC SI200X350STC is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 350 mm stroke. It delivers 15708 N push and 15080 N pull at 0.5 MPa, operating via a G3/4 port. As an end-of-line product, it is replaced by the SAI200X350STC—a direct sharing the same ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. Your -S code means a magnet for CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200X350STC Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X350STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X350STC |
| Bore size | Ø200 mm |
| Stroke | 350 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 SAI200X350STC 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 SAI200X350STC 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 SI200X350STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×350 | 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 SI200X350STC Is Used
Heavy Press Systems
Drives large platens requiring 15708 N of push force at 0.5 MPa, utilizing the 350 mm stroke for deep draw operations.
Large Mold Handling
Actuates heavy tooling carts and mold transfer arms where the 50 mm adjustable cushions decelerate massive moving masses smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200X350STC with the SAI200X350STC
To replace this SI200X350STC, order the SAI200X350STC. Verify the TC trunnion mount, G3/4 port, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If sizing up or down, note the 160 mm bore offers 10053 N push @0.5 MPa, while the 200 mm hits 21991 N @0.7 MPa. Because this is a 350 mm stroke, use an external guide to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X350STC
- ✓ 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 SI200X350STC FAQ
Yes, the SI200X350STC is discontinued. The direct replacement is the SAI200X350STC. It shares the identical ISO 15552 mounting interface, 200 mm bore, 350 mm stroke, G3/4 port, and TC mount, so it drops directly into existing fixtures.
This double-acting cylinder features a G3/4 port. It outputs 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 SAI200X350STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X350STC replacement — usually within 7-8 hours.