This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X265S, 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 SI100X265S
The AirTAC Airtac SI100 Standard Cylinder SI100X265S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 265mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X265S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke265 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X265S
- 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 SI100X265S
The AirTAC SI100X265S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 100mm bore, and a 265mm stroke. It delivers 3927 N of push force at 0.5 MPa through its G1/2 port. As a legacy unit, it must be replaced by the current-production SAI100X265S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI replacement introduces an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. The original SI100X265S includes a magnet for legacy CS1-B/DS1-B sensors, while the SAI family also adds lock and valve variants like SAIL and BSAI that the SI line lacked.
Airtac SI100 Standard Cylinder SI100X265S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X265S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X265S |
| Bore size | Ø100 mm |
| Stroke | 265 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 SAI100X265S 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 SAI100X265S 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 SI100X265S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×265 | 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 SI100X265S Is Used
Heavy Press Clamping
Ideal for exerting high clamping force on large fabricated weldments, utilizing the 3927 N push capacity at 0.5 MPa to hold components securely during machining operations.
Logistics Diverters
Drives heavy-duty diverter arms on high-throughput parcel conveyors, where the 265mm stroke and adjustable end cushions manage rapid, high-mass redirection effectively.
Replacing the Airtac SI100 Standard Cylinder SI100X265S with the SAI100X265S
To replace the discontinued SI100X265S, order the SAI100X265S direct equivalent. Confirm your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/2 air port, and the M20x1.5 rod thread. The -S suffix indicates a piston magnet for position sensing; the legacy CS1-B/DS1-B switches can be swapped for current AirTAC sensors on the SAI unit. When sizing, a 100mm bore yields 3927 N push at 0.5 MPa; dropping to an 80mm bore reduces this to 2513 N, while a 125mm bore increases it to 6136 N. Because this is a 265mm stroke, ensure adequate guide support to prevent rod bending and side-load wear. Remember that a standard cylinder does not hold load without live air—the cushions only decelerate. For load holding on air loss, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X265S
- ✓ 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 SI100X265S FAQ
Yes, the SI100X265S is discontinued. The direct replacement is the AirTAC SAI100X265S. It features the same ISO 15552 mounting interface, 100mm bore, 265mm stroke, output force, and G1/2 port, fitting directly into existing fixtures.
The bore is 100mm with a G1/2 air port. The output force is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X265S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X265S replacement — usually within 7-8 hours.