This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX350, 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 SI100AX350
The AirTAC Airtac SI100 Standard Cylinder SI100AX350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 350mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX350
- 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 SI100AX350
The AirTAC SI100AX350 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 350mm stroke. Delivering 3927N push force at 0.5MPa, it features a SUS420J2 stainless piston rod (A option) and a G1/2 port. The direct replacement is the SAI100AX350, matching the interface, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For sensing, note this specific SKU lacks a magnet and cannot take a switch.
Airtac SI100 Standard Cylinder SI100AX350 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX350 |
| Bore size | Ø100 mm |
| Stroke | 350 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 SAI100AX350 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 SAI100AX350 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 SI100AX350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×350 | 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 SI100AX350 Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilising the 3927N push force at 0.5 MPa to hold components rigidly against the cutting tool.
Pallet Diversion
Actuates heavy-duty diverter arms on automated packaging lines, where the 350mm stroke provides the reach needed to redirect full pallets.
Replacing the Airtac SI100 Standard Cylinder SI100AX350 with the SAI100AX350
To replace the SI100AX350, order the SAI100AX350. Verify the ISO 15552 mounting interface, 350mm stroke, G1/2 port, and SUS420J2 rod. Because this SKU lacks a magnet (-S), it cannot support CS1-B/DS1-B sensors. Sizing both ways: a neighbouring 80mm bore yields 2513N [email protected], while a 125mm bore yields 6136N. At 350mm stroke, use external guides to prevent rod-bending under side loads. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX350
- ✓ 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 SI100AX350 FAQ
Yes, the SI100AX350 is discontinued. The direct replacement is the SAI100AX350. It is dimensionally interchangeable per ISO 15552, keeping the same 100mm bore, 350mm stroke, force, G1/2 port, and mounting fixtures.
This double-acting cylinder has a G1/2 port. It delivers 3927N push and 3681N pull at 0.5 MPa, 5497N push at 0.7 MPa, 7068N push at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX350 replacement — usually within 7-8 hours.