This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX85, 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 SI200BX85
The AirTAC Airtac SI200 Standard Cylinder SI200BX85 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 85mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX85, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke85 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX85
- 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 SI200BX85
The AirTAC SI200BX85 is a discontinued double-acting ISO 15552 profile cylinder with an 85 mm stroke, delivering 15708 N push force at 0.5 MPa. Its direct replacement is the SAI200BX85, retaining the same 200 mm bore, G3/4 port, and ISO 15552 mounting interface. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure, and this specific SKU lacks a magnet so it cannot accept a sensor.
The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the legacy line, and a Viton H seal option can elevate operating temperatures up to 150 C.
Airtac SI200 Standard Cylinder SI200BX85 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX85 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX85 |
| Bore size | Ø200 mm |
| Stroke | 85 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 SAI200BX85 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 SAI200BX85 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 SI200BX85
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×85 | 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 SI200BX85 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa with stable 200 mm bore guidance.
Automated Assembly Fixture
Clamps massive structural components in automated welding fixtures using the 50 mm adjustable air cushions.
Replacing the Airtac SI200 Standard Cylinder SI200BX85 with the SAI200BX85
To replace the discontinued SI200BX85, order the SAI200BX85, confirming the ISO 15552 mounting interface, 85 mm stroke, and G3/4 port. Because this SKU has no magnet (-S), it cannot support legacy CS1-B/DS1-B sensors. If you need more force than the 15708 N at 0.5 MPa, step up to a larger bore; if less is required, a 160 mm bore provides 10053 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SUS304 stainless rod (-B) option suits corrosive environments.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX85
- ✓ 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 SI200BX85 FAQ
Yes, the SI200BX85 is discontinued. The direct replacement is the SAI200BX85, which shares the same ISO 15552 mounting interface, 200 mm bore, 85 mm stroke, output force, and G3/4 port. It fits existing fixtures perfectly.
The 200 mm bore features a G3/4 port and delivers 15708 N push / 15080 N pull at 0.5 MPa, 21991 N push at 0.7 MPa, and 28274 N push at 0.9 MPa. The theoretical maximum force is 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX85
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX85 replacement — usually within 7-8 hours.