This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X85S, 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 SI100X85S
The AirTAC Airtac SI100 Standard Cylinder SI100X85S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 85mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X85S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X85S
- 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 SI100X85S
The AirTAC SI100X85S is a discontinued double-acting ISO 15552 profile cylinder with an 85 mm stroke and a 100 mm bore, delivering 3927 N of push force at 0.5 MPa through its G1/2 port. AirTAC replaced this legacy unit with the SAI100X85S. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, sliding directly into existing fixtures without mechanical changes.
The SAI upgrade introduces a refined piston seal featuring two Y-shaped one-way elements for extended lifespan and lower start-up pressure. The SAI family also expands functionality with SAIL, SAIF, and BSAI lock variants the original SI lacked. Your SI100X85S includes a piston magnet for legacy CS1-B/DS1-B sensors, which the SAI replacement pairs with current AirTAC switches.
Airtac SI100 Standard Cylinder SI100X85S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X85S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X85S |
| Bore size | Ø100 mm |
| Stroke | 85 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 SAI100X85S 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 SAI100X85S 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 SI100X85S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SI100X85S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927 N push force at 0.5 MPa to hold components rigidly against the tooling bed.
Bulk Package Diverters
Drives robust routing arms on high-throughput sorting lines, moving heavy industrial cartons efficiently within the 30-800 mm/s speed range.
Replacing the Airtac SI100 Standard Cylinder SI100X85S with the SAI100X85S
To replace your discontinued SI100X85S, order the SAI100X85S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the 85 mm stroke, the G1/2 port thread (PT, G, or NPT), and the built-in magnet for position sensing. Sizing checks: dropping to an 80 mm bore yields 2513 N push at 0.5 MPa, while a 125 mm bore provides 6136 N. At 0.7 MPa this 100 mm bore outputs 5497 N. Note that a plain cylinder drifts on air loss since the air cushion only decelerates near stroke end; for load holding, specify the SAIL or BSAI lock variant, or use an external rod lock. Rod material options include carbon steel, SUS420J2, and SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X85S
- ✓ 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 SI100X85S FAQ
Yes, the SI100X85S is discontinued. The direct replacement is the SAI100X85S. It is a true ISO 15552 profile cylinder that matches the 100 mm bore, 85 mm stroke, 3927 N force, G1/2 port, and mounting interface, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/2 air port and an 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 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 SAI100X85S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X85S replacement — usually within 7-8 hours.