This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX240, 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 SI100BX240
The AirTAC Airtac SI100 Standard Cylinder SI100BX240 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 SAI100BX240, 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 → SAI100BX240
- 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 SI100BX240
The AirTAC SI100BX240 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 240mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. This SKU uses a SUS304 stainless piston rod (the -B option) for corrosion resistance, but lacks a magnet, meaning it cannot accept position switches.
AirTAC replaced the SI family with the SAI100BX240 direct upgrade. It shares the exact ISO 15552 mounting interface, bore, stroke, force, and port. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
Airtac SI100 Standard Cylinder SI100BX240 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX240 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX240 |
| 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 SAI100BX240 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 SAI100BX240 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 SI100BX240
| 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 SI100BX240 Is Used
Heavy-Duty Pressing
Applies 3927 N at 0.5 MPa for seating bearings or assembling heavy mechanical components.
Washdown Actuation
The SUS304 stainless rod option handles elevated moisture or corrosive factory environments.
Replacing the Airtac SI100 Standard Cylinder SI100BX240 with the SAI100BX240
To replace the SI100BX240, order the SAI100BX240. Confirm the ISO 15552 mounting interface (LB, FA, FB, CA, CB, TC), the G1/2 port, and the 240mm stroke. Because this specific SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, specify an SAI with an S suffix. Sizing both ways: the 100mm bore yields 3927 N push at 0.5 MPa (neighbouring 80mm yields 2513 N, 125mm yields 6136 N). Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL lock or BSAI clamp-lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX240
- ✓ 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 SI100BX240 FAQ
Yes, the SI100BX240 is discontinued. The direct replacement is the SAI100BX240, sharing the same ISO 15552 mounting interface, 100mm bore, 240mm stroke, force, and G1/2 port.
The 100mm bore provides 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N at 0.9 MPa, and a max force of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX240
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX240 replacement — usually within 7-8 hours.