This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X375S, 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 SI100X375S
The AirTAC Airtac SI100 Standard Cylinder SI100X375S 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 SAI100X375S, 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 → SAI100X375S
- 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 SI100X375S
The AirTAC SI100X375S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore and 375 mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. AirTAC replaced this legacy unit with the SAI100X375S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size to fit existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. The built-in magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X375S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X375S |
| 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 SAI100X375S 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 SAI100X375S 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 SI100X375S
| 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 SI100X375S Is Used
Heavy Press Ejection
Provides the 3927 N push force required to eject dense stamped metal components from press dies safely.
Pallet Diversion
Actuates heavy-duty lane diverters on high-throughput packaging lines, handling loads near the 200 kg vertical lift threshold.
Vertical Lift Gates
Raises and lowers substantial material handling gates, relying on the 375 mm stroke to clear large pallet pathways.
Replacing the Airtac SI100 Standard Cylinder SI100X375S with the SAI100X375S
To replace the SI100X375S, order the SAI100X375S and verify your ISO 15552 mounting interface, G1/2 port threads (PT/G/NPT), and M20x1.5 rod-end connection. The -S suffix indicates a piston magnet for CS1-B/DS1-B switches; the SAI family uses current AirTAC switches. For sizing, a neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore yields 6136 N. Note that a plain cylinder drifts on air loss since the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 375 mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X375S
- ✓ 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 SI100X375S FAQ
Yes, the SI100X375S is discontinued. The direct replacement is the SAI100X375S. It is dimensionally interchangeable per ISO 15552, retaining the same 100 mm bore, 375 mm stroke, G1/2 port, and mounting accessories.
This 100 mm bore cylinder features a G1/2 port and delivers 3927 N push and 3681 N pull at 0.5 MPa. At 0.7 MPa it pushes 5497 N, and 7068 N at 0.9 MPa. The theoretical maximum force is 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X375S replacement — usually within 7-8 hours.