This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX375, 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 SI100BX375
The AirTAC Airtac SI100 Standard Cylinder SI100BX375 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 SAI100BX375, 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 → SAI100BX375
- 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 SI100BX375
The AirTAC SI100BX375 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 375mm stroke. It delivers 3927 N push force at 0.5 MPa. The direct replacement is the SAI100BX375, which matches the exact bore, stroke, G1/2 port, and ISO 15552 mounting interface for a seamless fixture swap.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor.
Airtac SI100 Standard Cylinder SI100BX375 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX375 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX375 |
| 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 SAI100BX375 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 SAI100BX375 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 SI100BX375
| 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 SI100BX375 Is Used
Heavy-Duty Pressing
Drives large stamping or forming fixtures requiring substantial thrust, utilizing the 3927 N push force at 0.5 MPa to seat heavy components.
Large Package Diversion
Actuates heavy-duty diverter arms along high-throughput packaging lines, moving substantial masses with a 375mm reach.
Replacing the Airtac SI100 Standard Cylinder SI100BX375 with the SAI100BX375
To replace the SI100BX375, order the SAI100BX375. Verify the ISO 15552 mounting interface, 100mm bore, 375mm stroke, G1/2 port, and your specific mounting accessory. Because this is a no-S SKU, it cannot support magnetic sensing; if position feedback is needed, select an SAI model with the -S magnet option. For sizing, neighbouring bores (80mm or 125mm) offer different force classes, with the 100mm providing 3927 N push at 0.5 MPa. Note that a plain cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Finally, at 375mm stroke, prevent rod bending by using external guides to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX375
- ✓ 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 SI100BX375 FAQ
Yes, the SI100BX375 is discontinued. The direct replacement is the SAI100BX375. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 375mm stroke, output force, G1/2 port, and mounting interface.
This double-acting cylinder features a G1/2 air port. It generates a push force of 3927 N and a pull force of 3681 N at 0.5 MPa. At 0.7 MPa the push force is 5497 N, reaching 7068 N at 0.9 MPa, with a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX375
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX375 replacement — usually within 7-8 hours.