This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX240S, 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 SI100BX240S
The AirTAC Airtac SI100 Standard Cylinder SI100BX240S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 240mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX240S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX240S
- 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 SI100BX240S
The AirTAC SI100BX240S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore, 240mm stroke, and a SUS304 stainless piston rod. Delivering 3927 N push force at 0.5 MPa, it is replaced by the SAI100BX240S. This direct successor shares the exact ISO 15552 mounting interface, G1/2 port, and stroke, fitting existing fixtures seamlessly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX240S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX240S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX240S |
| Bore size | Ø100 mm |
| Stroke | 240 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 SAI100BX240S 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 SAI100BX240S 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 SI100BX240S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×240 | 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 SI100BX240S Is Used
Heavy Press Clamping
Ideal for exerting high clamping force on large fabrication assemblies, utilizing the 3927 N push capacity at 0.5 MPa with the corrosion-resistant SUS304 rod.
Pallet Lift Stations
Drives vertical lifting of 200 kg loads in automated storage systems, relying on the 240mm stroke and adjustable air cushions to decelerate smoothly.
Bulk Material Diversion
Actuates heavy-duty diverters on packaging lines, where the G1/2 port and ISO 15552 interface ensure robust, high-flow performance.
Replacing the Airtac SI100 Standard Cylinder SI100BX240S with the SAI100BX240S
To replace the SI100BX240S, order the SAI100BX240S. Verify the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/2 port, and the -S magnet for current AirTAC switches. The 240mm stroke is nonstandard (not in the standard 25-200mm increments), so confirm lead times. Sizing both ways: a 100mm bore yields 3927 N push at 0.5 MPa, while an 80mm bore yields 2513 N. For strokes over 200mm, ensure external guides to prevent rod bending and side loads. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX240S
- ✓ 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 SI100BX240S FAQ
Yes, the AirTAC SI100BX240S is discontinued. The direct replacement is the SAI100BX240S. It features the same ISO 15552 mounting interface, 100mm bore, 240mm stroke, output force, G1/2 port, and SUS304 rod, dropping directly into existing fixtures.
The G1/2 port is fixed by the 100mm bore. Theoretical forces 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; and a maximum force of 801 kgf at 1.0 MPa. The cylinder operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX240S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX240S replacement — usually within 7-8 hours.