This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X120, 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 SI200X120
The AirTAC SI200 Standard Cylinder SI200X120 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 120mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X120, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke120 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X120
- 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 SI200X120
The AirTAC SI200X120 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 120 mm stroke. Built with an extruded aluminum barrel and a 40 mm carbon steel rod, it delivers 15708 N of push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI200X120, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and cushion dimensions.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for extended lifespan and lower start-up pressure. Note that this specific SI SKU lacks a magnet and cannot accept a position sensor, though the broader SAI family adds SAIL, SAIF, and BSAI lock variants absent from the original SI line.
Airtac SI200 Standard Cylinder SI200X120 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X120 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X120 |
| Bore size | Ø200 mm |
| Stroke | 120 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 SAI200X120 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 SAI200X120 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 SI200X120
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×120 | 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 SI200X120 Is Used
Heavy Stamp Pressing
Generates 21991 N of thrust at 0.7 MPa to drive large progressive die sets and form thick metal plates in automated fabrication lines.
Injection Mold Clamping
Secures heavy industrial mold halves using the 40 mm carbon steel rod, relying on the 50 mm adjustable air cushions to absorb end-of-stroke impact.
Replacing the Airtac SI200 Standard Cylinder SI200X120 with the SAI200X120
To replace the discontinued SI200X120, order the SAI200X120 and verify your existing fixture matches the ISO 15552 mounting interface dimensions. Retain your original mounting accessory (such as LB foot or TC trunnion) and confirm the port thread is G3/4. Because this legacy SKU has no magnet, it cannot support a CS1-B or DS1-B sensor; if position detection is required, migrate to an SAI200X120S equivalent. When sizing, note the 200 mm bore yields 15708 N push at 0.5 MPa, while a smaller 160 mm bore provides 10053 N if you are over-cycling. A standard double-acting cylinder drifts on air loss because the 50 mm adjustable cushion only decelerates the piston near stroke end; for secure load holding, specify the SAIL or BSAI lock variant, or add an external pilot check valve. Since the 120 mm stroke is relatively short for this massive bore, ensure your guide mechanism handles high side-load forces without rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X120
- ✓ 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 SI200X120 FAQ
Yes, the AirTAC SI200X120 is discontinued and end-of-life. The direct replacement is the SAI200X120. It is a current-production ISO 15552 profile cylinder that shares the identical mounting interface, 200 mm bore, 120 mm stroke, output force, and G3/4 port, fitting directly into existing fixtures.
The 200 mm bore cylinder uses a G3/4 air port and a M36x2 rod thread. It delivers 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa, with operating speeds of 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X120
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X120 replacement — usually within 7-8 hours.