This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX155S, 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 SI100AX155S
The AirTAC SI100 Standard Cylinder SI100AX155S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 155mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX155S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX155S
- 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 SI100AX155S
The AirTAC SI100AX155S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 155mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100AX155S, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It retains the SUS420J2 stainless rod and CS1-B/DS1-B magnet compatibility.
Airtac SI100 Standard Cylinder SI100AX155S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX155S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX155S |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAI100AX155S 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 SAI100AX155S 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 SI100AX155S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SI100AX155S Is Used
Heavy Pressing
Drives 3927 N at 0.5 MPa for seating bearings and heavy press fits in automated machining lines.
Stainless Rod Actuation
The SUS420J2 rod option resists corrosion in washdown environments for food and beverage conveying.
Replacing the Airtac SI100 Standard Cylinder SI100AX155S with the SAI100AX155S
To replace the SI100AX155S, order the SAI100AX155S. Verify the ISO 15552 mounting interface, 155mm stroke, G1/2 port, and the built-in magnet for sensors. The 155mm stroke is non-standard; ensure your fixture accommodates it. For sizing, a 100mm bore yields 3927 N push at 0.5 MPa; neighbouring 80mm and 125mm bores offer 2513 N and 6136 N respectively. A plain cylinder drifts on air loss, so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX155S
- ✓ 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 SI100AX155S FAQ
Yes, the SI100AX155S is discontinued. The direct replacement is the SAI100AX155S. It shares the same ISO 15552 mounting interface, 100mm bore, 155mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port feeds a 100mm bore yielding 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a max of 801 kgf at 1.0 MPa. The cushion decelerates the load but does not hold it without air.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX155S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX155S replacement — usually within 7-8 hours.