This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX250S, 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 SI200AX250S
The AirTAC SI200 Standard Cylinder SI200AX250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX250S
- 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 SI200AX250S
The AirTAC SI200AX250S is a discontinued double-acting ISO 15552 profile cylinder featuring a 200 mm bore and 250 mm stroke. Built with an extruded aluminum barrel, it delivers 15708 N of push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200AX250S, matching the bore, stroke, force, port, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This -A variant specifies a SUS420J2 stainless steel rod for corrosion resistance, while the -S magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX250S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX250S |
| Bore size | Ø200 mm |
| Stroke | 250 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 SAI200AX250S 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 SAI200AX250S 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 SI200AX250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×250 | 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 SI200AX250S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa, utilizing the 250 mm stroke to form thick steel plates.
Large Mold Clamping
Secures oversized injection molds in place, relying on the SUS420J2 stainless rod to resist moisture in humid production environments.
Replacing the Airtac SI200 Standard Cylinder SI200AX250S with the SAI200AX250S
To replace the SI200AX250S, order the SAI200AX250S and confirm the ISO 15552 mounting interface, 200 mm bore, 250 mm stroke, G3/4 port, and your specific mounting accessory. The -A rod denotes SUS420J2 stainless steel, and -S indicates a magnet for position sensing. If you need to size up or down, neighboring bores are 160 mm and 125 mm. At 0.5 MPa, this 200 mm bore generates 15708 N push and 15080 N pull force. A plain cylinder does not hold load on air loss; the 50 mm adjustable air cushions only decelerate near stroke ends. For load holding, specify an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Since the 250 mm stroke is under 300 mm, severe side-load rod bending is less critical, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX250S
- ✓ 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 SI200AX250S FAQ
Yes, the SI200AX250S is discontinued. The direct replacement is the SAI200AX250S. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 250 mm stroke, 15708 N force, G3/4 port, and mounting interface.
This 200 mm bore cylinder has a G3/4 port and provides 15708 N push / 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX250S replacement — usually within 7-8 hours.