This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI200BX375, 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 SI200BX375
The AirTAC Airtac SI200 Standard Cylinder SI200BX375 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø200mm bore and 375mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI200BX375, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ200 mm
- Stroke375 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI200BX375
- 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 SI200BX375
The AirTAC SI200BX375 is a discontinued double-acting ISO 15552 profile cylinder with a 200mm bore and 375mm stroke. It delivers 15708 N push force at 0.5 MPa via a G3/4 port. The direct replacement is the SAI200BX375, matching the interface, bore, stroke, force, port and mounting. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks a magnet (-S) and cannot take a sensor.
The SAI family adds variants the SI lacked, like the SAIL air-released lock, SAIF built-in valve and BSAI clamp-lock. Rod material options include carbon steel or SUS304 stainless (B). The Viton H seal raises the operating temperature from -20 to +70 C up to 150 C. This plain cylinder does not hold load on air loss; the cushion only decelerates. For held loads use an external rod lock or pilot check valve.
Airtac SI200 Standard Cylinder SI200BX375 Technical Specifications
| Model | Airtac SI200 Standard Cylinder SI200BX375 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI200BX375 |
| Bore size | Ø200 mm |
| Stroke | 375 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 SAI200BX375 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 SAI200BX375 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 SI200BX375
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 200 | Bore size in mm. |
| ×375 | 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 SI200BX375 Is Used
Heavy Stamping
Drives large presses and stamping dies requiring 15708 N push force at 0.5 MPa with stable 375mm travel.
Pallet Handling
Shifts heavy loaded pallets on conveyors, utilizing the 3204 kgf maximum theoretical output for high inertia loads.
Automated Assembly
Actuates large industrial fixtures and heavy tooling plates where a true ISO 15552 mounting interface is required.
Replacing the Airtac SI200 Standard Cylinder SI200BX375 with the SAI200BX375
To replace the discontinued SI200BX375, order the SAI200BX375. Confirm the ISO 15552 mounting interface, 200mm bore, 375mm stroke, G3/4 port (PT/G/NPT thread) and mounting accessory. This SKU has no magnet, so it cannot accept a CS1-B/DS1-B sensor; order an -S SAI if sensing is needed. Sizing both ways: a 160mm bore yields 10053 N push at 0.5 MPa, while a 200mm bore yields 21991 N at 0.7 MPa. For the 375mm stroke, use external guides to prevent rod-bending and side-load damage. A plain cylinder drifts on air loss; for load holding, use the SAIL/BSAI lock variant or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI200BX375
- ✓ 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 SI200BX375 FAQ
Yes, the SI200BX375 is discontinued. The direct replacement is the SAI200BX375. It is dimensionally interchangeable per ISO 15552, retaining the same 200mm bore, 375mm stroke, output force, G3/4 port and mounting fixtures.
It has a G3/4 port. Force 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; with a theoretical max of 3204 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI200BX375
Send us the quantity and destination. We confirm price, stock and lead time on the SAI200BX375 replacement — usually within 7-8 hours.