This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100AX500S, 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 SI100AX500S
The AirTAC Airtac SI100 Standard Cylinder SI100AX500S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 500mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100AX500S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke500 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100AX500S
- 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 SI100AX500S
The AirTAC SI100AX500S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 500 mm stroke. It features a SUS420J2 stainless steel rod and generates 3927 N push force at 0.5 MPa. The direct replacement is the SAI100AX500S, which retains the same G1/2 port, M20x1.5 thread, and mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI variants the SI lacked. The built-in magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100AX500S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100AX500S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100AX500S |
| Bore size | Ø100 mm |
| Stroke | 500 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 SAI100AX500S 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 SAI100AX500S 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 SI100AX500S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×500 | 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 SI100AX500S Is Used
Heavy Press Forming
Applies 3927 N of thrust at 0.5 MPa for stamping and light forming tasks on automated production lines.
Pallet Dispensing
The 500 mm stroke and 100 mm bore provide the long reach and push force needed to index heavy pallets.
Replacing the Airtac SI100 Standard Cylinder SI100AX500S with the SAI100AX500S
To replace the SI100AX500S, order the SAI100AX500S. Verify the ISO 15552 mounting interface, 500 mm stroke, G1/2 port, and SUS420J2 rod. The -S magnet works with CS1-B/DS1-B switches. For sizing, the 100 mm bore yields 3927 N push at 0.5 MPa; dropping to an 80 mm bore gives 2513 N, while a 125 mm bore provides 6136 N. This cylinder does not hold load without air; use the SAIL or BSAI lock variant for holding. At 500 mm stroke, use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100AX500S
- ✓ 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 SI100AX500S FAQ
Yes, the SI100AX500S is discontinued. The direct replacement is the SAI100AX500S. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 500 mm stroke, force, G1/2 port, and mounting fixtures.
The G1/2 port bore delivers 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 theoretical max of 801 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100AX500S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100AX500S replacement — usually within 7-8 hours.