This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX50, 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 SI100AX50
The AirTAC Airtac SI100 Standard Cylinder SI100AX50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 50mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX50
- 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 SI100AX50
The AirTAC SI100AX50 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 50mm stroke, delivering 3927N push force at 0.5MPa. It has been superseded by the SAI100AX50 direct replacement, which matches the exact bore, stroke, output force, G1/2 port and ISO 15552 mounting interface for seamless fixture integration. This specific SKU features a SUS420J2 stainless steel piston rod for corrosion resistance. Because it lacks a -S magnet, it cannot accept position sensors.
The SAI100AX50 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF and BSAI lock variants absent from the legacy SI line.
Airtac SI100 Standard Cylinder SI100AX50 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX50 |
| Bore size | Ø100 mm |
| Stroke | 50 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 SAI100AX50 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 SAI100AX50 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 SI100AX50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×50 | 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 SI100AX50 Is Used
Heavy Pressing
Drives robust clamping and pressing actions in automotive assembly lines, utilizing the 3927N push force at 0.5MPa to seat bearings firmly.
Pallet Handling
Actuates heavy-duty diverters and stops in distribution centers, where the 200kg vertical lift capacity manages substantial package loads.
Platen Lifting
Raises and lowers industrial platens in packaging machinery, relying on the SUS420J2 stainless rod to resist humid washdown environments.
Replacing the Airtac SI100 Standard Cylinder SI100AX50 with the SAI100AX50
To replace the SI100AX50, order the SAI100AX50 and verify the ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread. This unit has no -S magnet, so it cannot support legacy CS1-B/DS1-B switches; if sensing is needed, select an SAI model with the S suffix. For sizing down, an 80mm bore yields 2513N push at 0.5MPa; sizing up to 125mm provides 6136N. Remember that a standard cylinder drifts without live air, as the 36mm adjustable cushion only decelerates the load. For load-holding on air loss, use an external pilot check valve or explore the SAIL/BSAI lock variants. The -A rod provides SUS420J2 stainless steel corrosion resistance over the standard carbon steel rod.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX50
- ✓ 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 SI100AX50 FAQ
Yes, the SI100AX50 is discontinued. The direct replacement is the AirTAC SAI100AX50. It shares the identical ISO 15552 mounting interface, 100mm bore, 50mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
This double-acting cylinder features a G1/2 air port and generates a push force of 3927N and a pull force of 3681N at 0.5MPa. At 0.7MPa the push force is 5497N, and at 0.9MPa it is 7068N. The theoretical maximum force is 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX50
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX50 replacement — usually within 7-8 hours.