This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX35S, 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 SI100AX35S
The AirTAC Airtac SI100 Standard Cylinder SI100AX35S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 35mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX35S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke35 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX35S
- 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 SI100AX35S
The AirTAC SI100AX35S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 35mm stroke, and a SUS420J2 stainless steel piston rod. It delivers 3927 N push force at 0.5 MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100AX35S, a direct replacement sharing the exact ISO 15552 mounting interface, bore, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This -S model includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI accepts current AirTAC switches.
Airtac SI100 Standard Cylinder SI100AX35S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX35S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX35S |
| Bore size | Ø100 mm |
| Stroke | 35 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 SAI100AX35S 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 SAI100AX35S 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 SI100AX35S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×35 | 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 SI100AX35S Is Used
High-Force Clamping
Secures heavy steel fabrication workpieces with 3927 N of thrust at 0.5 MPa, utilizing the SUS420J2 rod for corrosion resistance in humid machining environments.
Short-Stroke Pressing
Performs compact 35mm pressing and seating operations for heavy bearings, delivering stable power without requiring a long actuator footprint.
Stainless Rod Actuation
Drives short linear motions in washdown or mildly corrosive industrial zones where the standard carbon-steel rod would face premature wear.
Replacing the Airtac SI100 Standard Cylinder SI100AX35S with the SAI100AX35S
To replace the SI100AX35S, order the SAI100AX35S, confirming the ISO 15552 interface, 100mm bore, 35mm stroke, G1/2 port, and mounting accessory. The -A suffix denotes the SUS420J2 stainless rod, and -S indicates the magnet for position sensing. If you need less force, the 80mm bore offers 2513 N push at 0.5 MPa; for more power, the 125mm bore yields 6136 N. Note that a standard cylinder drifts on air loss since cushions only decelerate; use a pilot check valve or the SAIL/BSAI lock variant to hold loads. The short 35mm stroke minimizes rod bending, but always guide external loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX35S
- ✓ 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 SI100AX35S FAQ
Yes, the AirTAC SI100AX35S is discontinued. The direct replacement is the SAI100AX35S. It shares the identical ISO 15552 mounting interface, 100mm bore, 35mm stroke, output force, and G1/2 port, fitting directly into your existing fixtures.
This double-acting cylinder uses a G1/2 air port. It generates 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 SAI100AX35S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX35S replacement — usually within 7-8 hours.