This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX375S, 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 SI100 Standard Cylinder SI100BX375S
The AirTAC Airtac SI100 Standard Cylinder SI100BX375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 375mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke375 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX375S
- 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 SI100 Standard Cylinder SI100BX375S
The AirTAC SI100BX375S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 375mm stroke, and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX375S. This direct successor shares the exact G1/2 port, M20x1.5 thread, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. Note the -S magnet works with legacy CS1-B/DS1-B sensors, while SAIL lock and BSAI clamp variants cover load holding.
Airtac SI100 Standard Cylinder SI100BX375S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX375S |
| Bore size | Ø100 mm |
| Stroke | 375 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100BX375S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100BX375S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100BX375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | 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 SI100 Standard Cylinder SI100BX375S Is Used
Heavy Stamping Press
Drives large platens and stamping dies requiring substantial push force and a long 375mm travel distance.
Pallet Diversion
Actuates heavy-duty routing gates on high-capacity material handling lines with reliable 100mm bore power.
Vertical Lift Gate
Raises industrial loading dock gates, utilizing the SUS304 rod for corrosion resistance in harsh environments.
Replacing the Airtac SI100 Standard Cylinder SI100BX375S with the SAI100BX375S
To replace the SI100BX375S, order the SAI100BX375S. Confirm the ISO 15552 mounting interface, 100mm bore, 375mm stroke, G1/2 port, and magnet. The -B rod is SUS304 stainless; the default is carbon steel. If downsizing, an 80mm bore yields 2513 N [email protected]; if upsizing, a 125mm bore gives 6136 N. Because this is a 375mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX375S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100BX375S FAQ
Yes, the SI100BX375S is discontinued. The direct replacement is the SAI100BX375S. It matches the ISO 15552 mounting interface, 100mm bore, 375mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
It features a G1/2 air port. Force ratings are 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX375S replacement — usually within 7-8 hours.