This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X485S, 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 SI100X485S
The AirTAC SI100 Standard Cylinder SI100X485S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 485mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X485S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke485 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X485S
- 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 SI100X485S
The AirTAC SI100X485S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 485mm stroke. Delivering 3927N push force at 0.5MPa, it features a G1/2 port, M20x1.5 rod thread, and a piston magnet for position sensing. AirTAC replaced this legacy unit with the SAI100X485S, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the SI line, and your existing CS1-B/DS1-B sensors mount directly to the current AirTAC switch groove.
Airtac SI100 Standard Cylinder SI100X485S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X485S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X485S |
| Bore size | Ø100 mm |
| Stroke | 485 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 SAI100X485S 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 SAI100X485S 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 SI100X485S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×485 | 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 SI100X485S Is Used
Heavy Press Staging
Indexes large metal panels into a hydraulic press, using the 3927N thrust to push heavy blanks firmly against the hard stop before clamping.
Pallet Diversion
Actuates a heavy-duty routing gate on a 1000mm roller conveyor, providing the force needed to redirect fully loaded pallets onto a secondary line.
Vertical Lift Gate
Raises and lowers a 200kg mezzanine safety gate, relying on the 485mm stroke to clear the overhead clearance zone for forklift access.
Replacing the Airtac SI100 Standard Cylinder SI100X485S with the SAI100X485S
To replace the SI100X485S, order the SAI100X485S and verify your ISO 15552 mounting accessory (LB, FA, CA, TC), G1/2 port, and the -S magnet requirement. If sizing up or down, neighboring bores 80mm and 125mm yield 2513N and 6136N push at 0.5MPa respectively. Because this is a 485mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X485S
- ✓ 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 SI100X485S FAQ
Yes, the SI100X485S is discontinued. The direct replacement is the AirTAC SAI100X485S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 485mm stroke, G1/2 port, and mounting interface, so it fits existing fixtures without modification.
It uses a G1/2 air port. The force ratings are 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical maximum of 801kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X485S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X485S replacement — usually within 7-8 hours.