This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX260S, 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 SI100BX260S
The AirTAC Airtac SI100 Standard Cylinder SI100BX260S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 260mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX260S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX260S
- 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 SI100BX260S
The AirTAC SI100BX260S is a discontinued double-acting ISO 15552 profile cylinder featuring a 100mm bore, 260mm stroke, and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX260S. This direct upgrade shares the exact ISO 15552 mounting interface, G1/2 port, and M20x1.5 rod thread, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family introduces SAIL and BSAI lock variants the SI lacked.
Airtac SI100 Standard Cylinder SI100BX260S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX260S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX260S |
| Bore size | Ø100 mm |
| Stroke | 260 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 SAI100BX260S 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 SAI100BX260S 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 SI100BX260S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×260 | 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 SI100BX260S Is Used
Heavy-Duty Pressing
Applies up to 7068 N of thrust at 0.9 MPa for seating bearings and forming components in automated machinery.
Pallet Diversion
Provides the robust force needed to redirect heavy product pallets along high-throughput packaging lines.
Replacing the Airtac SI100 Standard Cylinder SI100BX260S with the SAI100BX260S
To replace the SI100BX260S, order the SAI100BX260S. Verify your ISO 15552 mounting accessories (LB, FA, TC, etc.), the G1/2 air port, and the M20x1.5 rod thread. The -S magnet and -B SUS304 rod are retained. If sizing up or down, neighbouring bores (80mm or 125mm) offer 2513 N or 6136 N push at 0.5 MPa respectively. Note that a plain cylinder drifts on air loss; the air cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 260mm stroke, check side loads and use guide rails to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX260S
- ✓ 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 SI100BX260S FAQ
Yes, the SI100BX260S is discontinued. The direct replacement is the SAI100BX260S. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 260mm stroke, G1/2 port, and mounting interface.
It features a G1/2 air port. Force outputs are: 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; with a theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX260S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX260S replacement — usually within 7-8 hours.