This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX450, 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 SI200AX450
The AirTAC Airtac SI200 Standard Cylinder SI200AX450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 450mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke450 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX450
- 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 SI200AX450
The AirTAC SI200AX450 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 450 mm stroke. Built to deliver 15708 N of push force at 0.5 MPa, it features a Ø40 mm carbon steel rod, M36x2 thread, and adjustable 50 mm air cushions. AirTAC replaced this legacy unit with the SAI200AX450, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and G3/4 port. The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and extended life, plus the SUS420J2 stainless rod option carried over from the SI-A series.
Because this is a no-magnet SKU, it cannot accept a position switch. Note that a standard cylinder drifts on air loss; the cushions only decelerate the load near stroke end. For load holding, consider the SAIL lock or BSAI clamp-lock variants, or an external pilot check valve.
Airtac SI200 Standard Cylinder SI200AX450 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX450 |
| Bore size | Ø200 mm |
| Stroke | 450 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 SAI200AX450 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 SAI200AX450 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 SI200AX450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×450 | 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 SI200AX450 Is Used
Heavy Press Systems
Drives large stamping and forming presses requiring up to 28274 N of thrust at 0.9 MPa, utilizing the 50 mm adjustable cushions to absorb heavy kinetic energy.
Large Mold Handling
Actuates heavy injection mold bases or industrial tooling carts, taking advantage of the robust Ø40 mm rod and M36x2 threading for secure mounting.
Replacing the Airtac SI200 Standard Cylinder SI200AX450 with the SAI200AX450
To replace the discontinued SI200AX450, order the SAI200AX450. Verify your existing fixture's ISO 15552 mounting interface, the 450 mm stroke, and the G3/4 port. This unit has no magnet (-S), so it cannot support legacy CS1-B/DS1-B sensors; if position detection is required, select an SAI equivalent with the magnet option. When sizing, the 200 mm bore yields 15708 N push at 0.5 MPa; if you need less force, a 160 mm bore provides 10053 N. For higher force demands up to 1.0 MPa, this cylinder reaches a theoretical max of 3204 kgf. Because the 450 mm stroke is substantial, ensure external guides are used to prevent rod-bending and side-load damage. Finally, remember this plain cylinder will not hold a load without live air—use an external rod lock or explore the SAIL/BSAI lock variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX450
- ✓ 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 SI200AX450 FAQ
Yes, the AirTAC SI200AX450 is discontinued and end-of-life. The direct replacement is the SAI200AX450. It features the same ISO 15552 mounting interface, 200 mm bore, 450 mm stroke, output force, and G3/4 port, fitting directly into your existing fixtures.
This 200 mm bore cylinder has a G3/4 air port. At 0.5 MPa it provides 15708 N of push force and 15080 N of pull force. At 0.7 MPa the push force is 21991 N, and at 0.9 MPa it is 28274 N. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX450
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX450 replacement — usually within 7-8 hours.