This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X72S, 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 SI100X72S
The AirTAC Airtac SI100 Standard Cylinder SI100X72S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 72mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X72S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke72 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X72S
- 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 SI100X72S
The AirTAC SI100X72S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 72mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. The direct replacement is the SAI100X72S, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants the SI lacked. The -S suffix means it has a piston magnet for CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100X72S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X72S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X72S |
| Bore size | Ø100 mm |
| Stroke | 72 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 SAI100X72S 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 SAI100X72S 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 SI100X72S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×72 | 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 SI100X72S Is Used
Heavy Press Clamping
Secures large metal castings during machining operations using the full 3927N push force at 0.5 MPa.
Replacing the Airtac SI100 Standard Cylinder SI100X72S with the SAI100X72S
To replace the SI100X72S, order the SAI100X72S. Confirm the ISO 15552 mounting interface, G1/2 port, M20x1.5 rod thread, and -S magnet. The SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. For sizing both ways, a neighboring 80mm bore yields 2513N push at 0.5MPa, while a 125mm bore yields 6136N. A plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because this stroke is under 300mm, rod-bending side loads are minimal, but always guide the load.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X72S
- ✓ 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 SI100X72S FAQ
Yes, the SI100X72S is discontinued. The direct replacement is the SAI100X72S. It features the same ISO 15552 mounting interface, 100mm bore, 72mm stroke, output force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port feeds a 100mm bore that delivers 3927N push and 3681N pull at 0.5 MPa, 5497N push at 0.7 MPa, 7068N push at 0.9 MPa, and a maximum theoretical force of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X72S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X72S replacement — usually within 7-8 hours.