This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200X400N, 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 SI200X400N
The AirTAC SI200 Standard Cylinder SI200X400N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200X400N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200X400N
- 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 SI200X400N
The AirTAC SI200X400N is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 400 mm stroke. As an NBR-sealed unit, it operates from -20 to +70 C and delivers 15708 N push at 0.5 MPa through its G3/4 port. Because this SKU lacks a magnet (-S), it cannot accept position switches.
AirTAC replaced it with the SAI200X400N direct: identical bore, stroke, M36x2 rod thread, force and ISO 15552 mounting interface. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI200 Standard Cylinder SI200X400N Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200X400N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200X400N |
| Bore size | Ø200 mm |
| Stroke | 400 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 SAI200X400N 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 SAI200X400N 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 SI200X400N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×400 | 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 SI200X400N Is Used
Heavy Stamp Press
Drives large tonnage metal forming presses requiring 21991 N push at 0.7 MPa to deform thick plate steel.
Pallet Hoist Gate
Actuates robust 800 kg vertical lift gates in automated warehouses, matching the 801 kg safe lift capacity.
Injection Mold Clamp
Secures heavy industrial molds with a theoretical max output of 3204 kgf at 1.0 MPa operating pressure.
Replacing the Airtac SI200 Standard Cylinder SI200X400N with the SAI200X400N
To replace the SI200X400N, order the SAI200X400N. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 400 mm stroke, and the G3/4 port. If you need position sensing, you must select an SAI variant with a magnet since this no-S SKU cannot take a sensor. Sizing down, a 160 mm bore yields 10053 N push at 0.5 MPa; sizing up is not available above 200 mm. For a 400 mm stroke, use an external guide to prevent rod bending and side-load wear. Note that 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 variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200X400N
- ✓ 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 SI200X400N FAQ
Yes, the SI200X400N is discontinued. The direct replacement is the SAI200X400N. It is dimensionally interchangeable per ISO 15552, keeping the same 200 mm bore, 400 mm stroke, force, G3/4 port and mounting fixtures.
The G3/4 port supplies 15708 N push and 15080 N pull at 0.5 MPa. At 0.7 MPa push is 21991 N, and 28274 N at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200X400N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200X400N replacement — usually within 7-8 hours.