This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX155S, 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 SI200AX155S
The AirTAC Airtac SI200 Standard Cylinder SI200AX155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 155mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke155 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX155S
- 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 SI200AX155S
The AirTAC SI200AX155S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 155mm stroke. It delivers 15708 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200AX155S, which shares identical ISO 15552 mounting dimensions, stroke, output force and porting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This unit includes the -A SUS420J2 stainless steel piston rod for corrosion resistance and an -S magnet for legacy CS1-B/DS1-B sensors.
Note that a standard cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external rod lock, pilot check valve, or the SAI family's SAIL or BSAI lock variants.
Airtac SI200 Standard Cylinder SI200AX155S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX155S |
| Bore size | Ø200 mm |
| Stroke | 155 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 SAI200AX155S 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 SAI200AX155S 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 SI200AX155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×155 | 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 SI200AX155S Is Used
Heavy Stamp Pressing
Drives large metal forming and stamping dies requiring 15708 N of push force at 0.5 MPa with stable 200mm bore rigidity.
Mold Clamping Fixtures
Secures large injection molds or heavy industrial fixtures, relying on the SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI200 Standard Cylinder SI200AX155S with the SAI200AX155S
To replace the discontinued SI200AX155S, order the SAI200AX155S. Verify your ISO 15552 mounting interface, 155mm stroke, G3/4 port, and mounting accessories (LB, FA, TC, etc.). The -A suffix specifies the SUS420J2 stainless rod, and -S confirms the magnet for CS1-B/DS1-B switches. If downsizing, a 160mm bore yields 10053 N push at 0.5 MPa; if upsizing is impossible, this 200mm bore already provides 15708 N at 0.5 MPa and 21991 N at 0.7 MPa. Remember that a plain cylinder drifts without air pressure—the cushion only decelerates. For load holding, consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX155S
- ✓ 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 SI200AX155S FAQ
Yes, the SI200AX155S is discontinued. The direct replacement is the SAI200AX155S. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 155mm stroke, force, G3/4 port, and mounting interface.
It features a G3/4 air port and M36x2 rod thread. Force output is 15708 N push and 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, 28274 N push at 0.9 MPa, with a theoretical max of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX155S replacement — usually within 7-8 hours.