This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X350, 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 SI100X350
The AirTAC SI100 Standard Cylinder SI100X350 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 SAI100X350, 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 → SAI100X350
- 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 SI100X350
The AirTAC SI100X350 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 350mm stroke, delivering a push force of 3927 N at 0.5 MPa. The direct replacement is the SAI100X350, which maintains the exact same ISO 15552 mounting interface, G1/2 port size, output force, and accessories. This allows the SAI to slide right into existing fixtures without mechanical modifications.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life. For applications needing load holding, the SAI family introduces SAIL, SAIF, and BSAI lock variants that the legacy SI lacked. Note that this specific SKU lacks a magnet (-S) and therefore cannot accept position sensors.
Airtac SI100 Standard Cylinder SI100X350 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X350 |
| 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 SAI100X350 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 SAI100X350 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 SI100X350
| 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 SI100X350 Is Used
Pallet Diversion
Actuates heavy diverters on packaging lines, using the 3927 N push force to reliably shift loaded pallets onto secondary conveyors.
Press Ejection
Ejects formed metal or composite parts from hydraulic presses, relying on the 36mm adjustable air cushions to decelerate the rod smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100X350 with the SAI100X350
To replace the discontinued SI100X350, order the SAI100X350 direct equivalent, verifying your ISO 15552 mounting accessory (LB, FA, TC, etc.), G1/2 port thread (PT, G, or NPT), and the 350mm stroke. Because this SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; if position detection is required, select an SAI100X350S and add current AirTAC switches. Sizing both ways: if you need less force, the 80mm bore offers 2513 N push at 0.5 MPa; if you need more, the 125mm bore provides 6136 N. For this 350mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss—the cushion only decelerates—so for suspended loads use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X350
- ✓ 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 SI100X350 FAQ
Yes, the AirTAC SI100X350 is discontinued. The direct replacement is the SAI100X350. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 350mm stroke, G1/2 port, and mounting footprint to fit existing fixtures perfectly.
This double-acting cylinder features a G1/2 air port and an M20x1.5 rod thread. It delivers a push force of 3927 N and a pull force of 3681 N 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 SAI100X350
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X350 replacement — usually within 7-8 hours.