This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX250S, 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 SI200BX250S
The AirTAC SI200 Standard Cylinder SI200BX250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX250S
- 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 SI200BX250S
The AirTAC SI200BX250S is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 250mm stroke. Built with an extruded aluminum barrel and a SUS304 stainless piston rod (-B), it delivers 15708 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI200BX250S, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock, SAIF valve, and BSAI clamp-lock variants the SI lacked.
Airtac SI200 Standard Cylinder SI200BX250S Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX250S |
| Bore size | Ø200 mm |
| Stroke | 250 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 SAI200BX250S 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 SAI200BX250S 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 SI200BX250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×250 | 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 SI200BX250S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 15708 N of push force at 0.5 MPa with robust 40mm stainless rod endurance.
Automotive Assembly Jig
Actuates massive chassis alignment fixtures where the 200mm bore and ISO 15552 mounting handle substantial inertial loads safely.
Pallet Lowering Unit
Controls the descent of 801 kg vertical loads using adjustable 50mm air cushions to decelerate smoothly at stroke end.
Replacing the Airtac SI200 Standard Cylinder SI200BX250S with the SAI200BX250S
To replace the SI200BX250S, order the SAI200BX250S. Verify your ISO 15552 mounting interface, G3/4 port, M36x2 rod thread, and the -S magnet for CS1-B/DS1-B sensors. If you need higher force, the neighboring bore is not larger, but at 0.7 MPa this 200mm bore outputs 21991 N. For lower force, step down to a 160mm bore. Remember, a plain cylinder drifts without live air; the 50mm cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 250mm stroke, side-load and rod-bending risks are low, but ensure proper guide alignment.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX250S
- ✓ 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 SI200BX250S FAQ
Yes, the SI200BX250S is discontinued. The direct replacement is the SAI200BX250S. It features the same ISO 15552 mounting interface, 200mm bore, 250mm stroke, output force, G3/4 port, and mounting accessories, fitting directly into existing fixtures.
The 200mm bore provides 15708 N push and 15080 N pull at 0.5 MPa. At 0.7 MPa push is 21991 N, and 28274 N at 0.9 MPa. The theoretical max force is 3204 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, and it uses a G3/4 port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX250S replacement — usually within 7-8 hours.