This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX375S, 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 SI100AX375S
The AirTAC SI100 Standard Cylinder SI100AX375S 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 SAI100AX375S, 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 → SAI100AX375S
- 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 SI100AX375S
The AirTAC SI100AX375S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 375mm stroke. It delivers 3927N push at 0.5MPa through a G1/2 port. AirTAC replaced it with the SAI100AX375S, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, force, and porting.
The SAI upgrade features a new two Y-shaped one-way piston seal for low start-up pressure and long life. The -A suffix denotes a SUS420J2 stainless rod, while the -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100AX375S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX375S |
| 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 SAI100AX375S 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 SAI100AX375S 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 SI100AX375S
| 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 SI100AX375S Is Used
Heavy Press Clamping
Secures large automotive castings during machining, utilizing the 5497N push force at 0.7MPa to hold parts rigidly against cutting loads.
Pallet Diverting
Actuates heavy-duty routing gates on high-throughput packaging lines, where the 375mm stroke provides full lane separation for wide pallets.
Replacing the Airtac SI100 Standard Cylinder SI100AX375S with the SAI100AX375S
To replace the SI100AX375S, order the SAI100AX375S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the -S magnet for CS1-B/DS1-B switches. The SUS420J2 stainless rod (-A) is retained. Sizing both ways: a neighbouring 80mm bore yields 2513N push @0.5MPa, whereas a 125mm bore yields 6136N. At 375mm stroke, use external guides to prevent rod-bending side loads. For load holding on air loss, add an external pilot check valve or use the SAIL/BSAI lock variants, as cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX375S
- ✓ 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 SI100AX375S FAQ
Yes, the SI100AX375S is discontinued. The direct replacement is the SAI100AX375S. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 375mm stroke, G1/2 port, and mounting interface.
It features a G1/2 air port and M20x1.5 rod thread. Force ratings are: 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX375S replacement — usually within 7-8 hours.