This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX25S, 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 SI200BX25S
The AirTAC SI200 Standard Cylinder SI200BX25S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 25mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX25S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke25 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX25S
- 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 SI200BX25S
The AirTAC SI200BX25S is a discontinued double-acting ISO 15552 profile cylinder with a 200 mm bore and 25 mm stroke. It delivers 15708 N push force at 0.5 MPa and uses a G3/4 air port. The direct replacement is the SAI200BX25S, which matches the original ISO 15552 mounting interface, bore, stroke, output force and accessories.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SI200BX25S uses a SUS304 stainless piston rod (B option) and a Viton H seal for 0-150 C heat. For load holding, note the air cushion only decelerates; use an external rod lock or SAIL/BSAI variant.
Airtac SI200 Standard Cylinder SI200BX25S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX25S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX25S |
| Bore size | Ø200 mm |
| Stroke | 25 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 SAI200BX25S 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 SAI200BX25S 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 SI200BX25S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×25 | 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 SI200BX25S Is Used
Heavy Pressing
Applies 15708 N at 0.5 MPa for seating large components and heavy-duty pressing tasks in industrial assembly lines.
Pallet Lift Gates
Provides the brute push force needed to actuate heavy mechanical lift gates and robust material handling mechanisms.
Stamping Blocks
Short 25 mm stroke delivers rapid, high-impact stamping force for forming thick metal blocks in fabrication cells.
Replacing the Airtac SI200 Standard Cylinder SI200BX25S with the SAI200BX25S
To replace the SI200BX25S, order the SAI200BX25S. Confirm the ISO 15552 mounting interface, 200 mm bore, 25 mm stroke, G3/4 port (PT/G/NPT thread options), and the -S magnet for CS1-B/DS1-B switches. The SAI family adds SAIL (air-released lock), SAIF (built-in 4M valve, bores 32-100) and BSAI (clamp-lock) variants the SI lacked. Sizing both ways: if dropping to a 160 mm bore yields 10053 N push @0.5 MPa, while a 200 mm bore gives 15708 N. A plain cylinder drifts without live air; for held loads use an external pilot check valve or SAIL/BSAI lock. This short 25 mm stroke avoids rod-bending side-load issues seen in long strokes.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX25S
- ✓ 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 SI200BX25S FAQ
Yes, the SI200BX25S is discontinued. The direct replacement is the SAI200BX25S. It is dimensionally interchangeable per ISO 15552, retaining the same 200 mm bore, 25 mm stroke, force, G3/4 port and mounting accessories.
This double-acting cylinder has a G3/4 air port. It delivers 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 max of 3204 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX25S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX25S replacement — usually within 7-8 hours.