This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX375, 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 SI100AX375
The AirTAC Airtac SI100 Standard Cylinder SI100AX375 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 SAI100AX375, 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 → SAI100AX375
- 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 SI100AX375
The AirTAC SI100AX375 is a discontinued double-acting ISO 15552 profile cylinder featuring a 100 mm bore and 375 mm stroke. It delivers a thrust of 3927 N at 0.5 MPa using a G1/2 air port. AirTAC replaced this legacy unit with the SAI100AX375, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, force, and accessories.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This specific SKU includes a SUS420J2 stainless steel rod (A suffix) for corrosion resistance, but lacks a magnet, so it cannot accept position switches.
Airtac SI100 Standard Cylinder SI100AX375 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX375 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX375 |
| 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 SAI100AX375 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 SAI100AX375 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 SI100AX375
| 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 SI100AX375 Is Used
Heavy Press Clamping
Secures large metal workpieces in machining centers, utilizing the 3927 N push force at 0.5 MPa to hold components firmly during milling or drilling operations.
Pallet Diversion
Actuates heavy-duty routing gates on 375 mm strokes to redirect loaded pallets between parallel conveyor lines without requiring external pneumatic boosters.
Replacing the Airtac SI100 Standard Cylinder SI100AX375 with the SAI100AX375
To replace the SI100AX375, order the SAI100AX375. Verify your ISO 15552 mounting fixtures (LB, FA, TC, etc.), the G1/2 port thread (PT, G, or NPT), and the M20x1.5 rod thread. Because this 375 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage. If sizing down, an 80 mm bore yields 2513 N push at 0.5 MPa; if sizing up, a 125 mm bore provides 6136 N. This non-magnetic SKU cannot support sensors, unlike legacy CS1-B/DS1-B switches. Note that standard cylinders drift on air loss; for load holding, specify the SAIL or BSAI lock variant, or add an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX375
- ✓ 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 SI100AX375 FAQ
Yes, the AirTAC SI100AX375 is discontinued. The direct replacement is the SAI100AX375. It features the same ISO 15552 mounting interface, 100 mm bore, 375 mm stroke, G1/2 port, and output force, but adds an upgraded two Y-shaped element piston seal for longer life.
This double-acting cylinder uses a G1/2 air port and an M20x1.5 rod thread. The thrust 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 maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX375
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX375 replacement — usually within 7-8 hours.