This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X685S, 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 SI100X685S
The AirTAC Airtac SI100 Standard Cylinder SI100X685S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 685mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X685S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke685 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X685S
- 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 SI100X685S
The AirTAC SI100X685S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 685mm stroke. Delivering 3927N push and 3681N pull at 0.5MPa via a G1/2 port, it is superseded by the SAI100X685S. This direct replacement shares identical mounting, force, and interface dimensions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The -S suffix means a built-in piston magnet for legacy CS1-B/DS1-B sensors. Note that plain cylinders drift without live air; use the SAIL lock or BSAI clamp-lock variants for load holding.
Airtac SI100 Standard Cylinder SI100X685S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X685S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X685S |
| Bore size | Ø100 mm |
| Stroke | 685 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 SAI100X685S 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 SAI100X685S 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 SI100X685S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×685 | 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 SI100X685S Is Used
Heavy Material Transfer
Drives robust pallet stops and heavy product diverters on high-throughput packaging lines, utilizing the 3927N push force to index loaded conveyors reliably.
Automated Warehousing
Actuates large vertical lift gates and heavy-load positioning carriages in automated storage systems, where the 685mm stroke provides extended reach for tier access.
Industrial Pressing
Executes high-force clamping and pressing operations in automotive component assembly, ensuring rigid holding via the 100mm bore's substantial thrust output.
Replacing the Airtac SI100 Standard Cylinder SI100X685S with the SAI100X685S
To replace the SI100X685S, order the SAI100X685S. Verify the ISO 15552 mounting interface, 100mm bore, 685mm stroke, G1/2 port, and M20x1.5 rod thread. The -S magnet equates to CS1-B/DS1-B legacy sensors; the SAI family uses current AirTAC switches. For sizing, the 100mm bore yields 5497N push at 0.7MPa; dropping to an 80mm bore gives 2513N push at 0.5MPa. A plain cylinder does not hold load on air loss—cushions only decelerate—so specify SAIL or BSAI lock variants if needed. At 685mm, prevent rod bending by using external guides to absorb side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X685S
- ✓ 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 SI100X685S FAQ
Yes, the SI100X685S is discontinued. The direct replacement is the AirTAC SAI100X685S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 685mm stroke, G1/2 port, and mounting interface. The SAI simply upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
This double-acting cylinder operates at 0.15-1.0 MPa with a G1/2 port and M20x1.5 rod thread. Force output is 3927N push and 3681N pull at 0.5 MPa, 5497N push at 0.7 MPa, 7068N at 0.9 MPa, and a theoretical max of 801 kgf at 1.0 MPa. It features a 25mm rod, 36mm adjustable cushions, and operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X685S
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