This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X510S, 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 SI100X510S
The AirTAC Airtac SI100 Standard Cylinder SI100X510S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 510mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X510S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke510 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X510S
- 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 SI100X510S
The AirTAC SI100X510S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 510mm stroke. It delivers 3927N push force at 0.5MPa via a G1/2 port. The direct replacement is the SAI100X510S, retaining identical mounting, bore, stroke, force, and port dimensions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI100 Standard Cylinder SI100X510S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X510S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X510S |
| Bore size | Ø100 mm |
| Stroke | 510 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 SAI100X510S 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 SAI100X510S 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 SI100X510S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×510 | 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 SI100X510S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations, utilizing the 3927N push force at 0.5MPa to hold components rigidly against cutting loads.
Pallet Transfer Gate
Actuates heavy-duty diverter gates on conveyor lines, where the 510mm stroke provides the full travel needed to redirect standard pallets smoothly.
Material Lowering Arm
Controls the descent of loaded lifting arms, relying on adjustable air cushions to decelerate the 200kg safe vertical lift capacity at stroke end.
Replacing the Airtac SI100 Standard Cylinder SI100X510S with the SAI100X510S
To replace the SI100X510S, order the SAI100X510S. Confirm the ISO 15552 mounting interface, 510mm stroke, G1/2 port (PT/G/NPT), and the -S magnet for CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). For sizing, the neighboring 80mm bore yields 2513N push at 0.5MPa, while the 125mm bore yields 6136N; this 100mm bore provides 5497N at 0.7MPa. Because the 510mm stroke is long, use external guides to prevent rod-bending side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X510S
- ✓ 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 SI100X510S FAQ
Yes, the SI100X510S is discontinued. The direct replacement is the SAI100X510S. It is dimensionally interchangeable per ISO 15552, matching the 100mm bore, 510mm stroke, G1/2 port, and mounting fixtures perfectly.
This 100mm bore cylinder features a G1/2 port and M20x1.5 rod thread. It 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X510S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X510S replacement — usually within 7-8 hours.