This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX45, 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 SI200BX45
The AirTAC Airtac SI200 Standard Cylinder SI200BX45 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 45mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX45, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke45 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX45
- 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 SI200BX45
The AirTAC SI200BX45 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 45mm stroke. It delivers 15708 N push force at 0.5 MPa via a G3/4 port. The direct replacement is the SAI200BX45, matching the exact bore, stroke, force, port and mounting interface.
This SKU features a SUS304 stainless piston rod (the -B option) rather than standard carbon steel, but lacks a magnet so it cannot accept position switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI200 Standard Cylinder SI200BX45 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX45 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX45 |
| Bore size | Ø200 mm |
| Stroke | 45 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 SAI200BX45 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 SAI200BX45 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 SI200BX45
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×45 | 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 SI200BX45 Is Used
Heavy Stamping
Generates 21991 N at 0.7 MPa for driving large metal forming presses and heavy-duty stamping dies.
Press Fit Assembly
Delivers up to 3204 kgf max theoretical force to seat large industrial bearings and heavy machinery components.
Massive Material Clamping
Provides robust 15080 N pull force at 0.5 MPa for securing heavy steel fabrication blocks during welding.
Replacing the Airtac SI200 Standard Cylinder SI200BX45 with the SAI200BX45
To replace the SI200BX45, order the SAI200BX45. Confirm the ISO 15552 mounting interface, 200mm bore, 45mm stroke, G3/4 port (PT/G/NPT) and your specific mounting accessory. Because this is a non-magnet SKU, it cannot support sensors; if sensing is needed, specify an SAI model with the -S option for current AirTAC switches. If sizing down, consider the 160mm bore (10053 N push @0.5 MPa); if sizing up, note 200mm is the largest standard option. For load holding, a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX45
- ✓ 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 SI200BX45 FAQ
Yes, the SI200BX45 is discontinued. The direct replacement is the SAI200BX45. It is dimensionally interchangeable per the ISO 15552 mounting interface, retaining the same 200mm bore, 45mm stroke, force, G3/4 port and mounting accessories.
The 200mm bore uses a G3/4 port. 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, and a maximum theoretical force of 3204 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX45
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX45 replacement — usually within 7-8 hours.