This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X350N, 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 SI100X350N
The AirTAC SI100 Standard Cylinder SI100X350N 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 SAI100X350N, 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 → SAI100X350N
- 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 SI100X350N
The AirTAC SI100X350N is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 350mm stroke. Delivering 3927 N push force at 0.5 MPa via a G1/2 port, it is replaced by the SAI100X350N. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this SKU lacks a magnet (-S) so it cannot take CS1-B/DS1-B sensors; the NBR (-N) seal handles -20 to +70 C, with Viton H available for higher heat.
Airtac SI100 Standard Cylinder SI100X350N Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X350N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X350N |
| 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 SAI100X350N 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 SAI100X350N 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 SI100X350N
| 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 SI100X350N Is Used
Heavy Material Handling
Ideal for moving heavy pallets or chassis components, utilizing the 3927 N push force to shift substantial loads across automated work cells.
Large Press Clamping
Provides robust holding power for large part machining or press operations, taking advantage of the 100mm bore's high thrust capacity.
Replacing the Airtac SI100 Standard Cylinder SI100X350N with the SAI100X350N
To replace the SI100X350N, order the SAI100X350N. Verify the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 350mm stroke, G1/2 port, and M20x1.5 rod thread. Because this SKU lacks a magnet, it cannot accept position sensors; if sensing is needed, select an SAI model with the -S suffix for current AirTAC switches. For sizing, the 100mm bore provides 3927 N push at 0.5 MPa; if less force is needed, an 80mm bore offers 2513 N, while a 125mm bore provides 6136 N. With a 350mm stroke, use external guides to prevent rod bending and side loads. Finally, a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X350N
- ✓ 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 SI100X350N FAQ
Yes, the SI100X350N is discontinued. The direct replacement is the SAI100X350N. It shares the same ISO 15552 mounting interface, 100mm bore, 350mm stroke, output force, G1/2 port, and accessories, fitting directly into your existing fixtures.
This double-acting cylinder features a G1/2 air port and M20x1.5 rod thread. It delivers 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X350N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X350N replacement — usually within 7-8 hours.