This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX250, 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 SI200AX250
The AirTAC Airtac SI200 Standard Cylinder SI200AX250 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 SAI200AX250, 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 → SAI200AX250
- 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 SI200AX250
The AirTAC SI200AX250 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 250mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI200AX250, a direct upgrade retaining the exact ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This specific SKU uses a SUS420J2 stainless steel rod (option A) but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI200 Standard Cylinder SI200AX250 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX250 |
| 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 SAI200AX250 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 SAI200AX250 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 SI200AX250
| 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 SI200AX250 Is Used
Heavy Stamp Pressing
Drives large forming dies with 21991 N push force at 0.7 MPa, utilizing the SUS420J2 stainless rod for corrosion resistance in harsh shop environments.
Palletizer Actuation
Shifts massive loaded pallets via G3/4 ports, relying on 50 mm adjustable air cushions to decelerate the 40 mm rod smoothly at stroke ends.
Replacing the Airtac SI200 Standard Cylinder SI200AX250 with the SAI200AX250
To replace the discontinued SI200AX250, order the SAI200AX250. Verify your ISO 15552 mounting fixtures, the G3/4 air port, and the M36x2 rod-end thread. Because this SKU lacks a magnet (-S), it cannot support position sensing; if you need switches, select an SAI equivalent with the magnet option and use current AirTAC sensors. If you need to size down, the 160mm bore offers 10053 N push at 0.5 MPa. If sizing up is required, note that 200mm is the largest standard bore. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider the SAIL or BSAI lock variants, or an external pilot check valve. At 250mm stroke, side-load risks are low, but always ensure rigid guidance to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX250
- ✓ 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 SI200AX250 FAQ
Yes, the AirTAC SI200AX250 is discontinued. The direct replacement is the SAI200AX250. It is dimensionally interchangeable per ISO 15552, matching the 200mm bore, 250mm stroke, output force, G3/4 port, and mounting accessories.
The 200mm bore generates 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and a theoretical max of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. It uses a G3/4 port and a 40 mm piston rod.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX250
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX250 replacement — usually within 7-8 hours.