This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X520S, 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 SI100X520S
The AirTAC SI100 Standard Cylinder SI100X520S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 520mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X520S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke520 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X520S
- 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 SI100X520S
The AirTAC SI100X520S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 520mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. AirTAC replaced this legacy unit with the SAI100X520S, a direct upgrade retaining the exact interface, M20x1.5 thread, and 36mm cushions.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X520S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X520S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X520S |
| Bore size | Ø100 mm |
| Stroke | 520 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 SAI100X520S 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 SAI100X520S 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 SI100X520S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×520 | 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 SI100X520S Is Used
Heavy Material Transfer
Pushes loaded pallets or heavy workpieces along a production line using the 3927N thrust at 0.5MPa operating pressure.
Large Press Ejection
Ejects molded or stamped parts from heavy machinery, relying on the 36mm adjustable air cushions to decelerate the rod smoothly.
Replacing the Airtac SI100 Standard Cylinder SI100X520S with the SAI100X520S
To replace this SI100X520S, order the SAI100X520S. Confirm your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the -S magnet for CS1-B/DS1-B switches. Neighbouring bores are 80mm (2513N push @0.5MPa) and 125mm (6136N push @0.5MPa); size both ways to match your 3927N requirement. Because the 520mm stroke exceeds 300mm, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X520S
- ✓ 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 SI100X520S FAQ
Yes, the SI100X520S is discontinued. The direct replacement is the SAI100X520S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 520mm stroke, G1/2 port, and mounting interface.
The bore delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X520S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X520S replacement — usually within 7-8 hours.