This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200AX55, 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 SI200AX55
The AirTAC SI200 Standard Cylinder SI200AX55 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 55mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200AX55, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke55 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200AX55
- 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 SI200AX55
The AirTAC SI200AX55 is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 55 mm stroke. Delivering 15708 N push force at 0.5 MPa via a G3/4 port, it is replaced by the SAI200AX55. This direct successor matches the exact mounting interface, bore, and output force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S) so it cannot take a CS1-B/DS1-B sensor. The SUS420J2 stainless rod resists corrosion. For load holding, use the SAIL lock or BSAI clamp-lock variant.
Airtac SI200 Standard Cylinder SI200AX55 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200AX55 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200AX55 |
| Bore size | Ø200 mm |
| Stroke | 55 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 SAI200AX55 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 SAI200AX55 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 SI200AX55
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×55 | 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 SI200AX55 Is Used
Heavy Press Stamping
Drives large tonnage metal forming and stamping presses where the 21991 N push force at 0.7 MPa is required to shape thick steel plates.
Automated Clamp Fixtures
Secures oversized cast components during machining operations, utilizing the 50 mm adjustable air cushion to decelerate the 40 mm rod smoothly.
Replacing the Airtac SI200 Standard Cylinder SI200AX55 with the SAI200AX55
To replace the SI200AX55, order the SAI200AX55 keeping the identical 200 mm bore, 55 mm stroke, G3/4 port, and ISO 15552 mounting. Confirm your rod material: the -A suffix specifies the SUS420J2 stainless steel rod, contrasting with the default carbon steel. Because this specific SKU lacks the -S magnet suffix, it cannot support legacy CS1-B/DS1-B sensors; order the -S version if position detection is required. If sizing down, a 160 mm bore offers 10053 N at 0.5 MPa. Note that a plain cylinder drifts on air loss; for load holding, select the SAIL or BSAI lock variant, or add an external pilot check valve. Since 55 mm is a short stroke, side-load risks are minimal, but ensure rod alignment to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200AX55
- ✓ 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 SI200AX55 FAQ
Yes, the AirTAC SI200AX55 is discontinued. The direct replacement is the SAI200AX55. It is a true ISO 15552 profile cylinder that matches the original 200 mm bore, 55 mm stroke, G3/4 port, and mounting interface, dropping directly into existing fixtures.
This 200 mm bore cylinder features a G3/4 air port and an M36x2 rod thread. The thrust ratings are: 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; and a theoretical maximum force of 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200AX55
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200AX55 replacement — usually within 7-8 hours.