This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX300, 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 SI100BX300
The AirTAC Airtac SI100 Standard Cylinder SI100BX300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 300mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX300
- 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 SI100BX300
The AirTAC SI100BX300 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 300mm stroke. Delivering 3927N push force at 0.5MPa via a G1/2 port, it is replaced by the SAI100BX300 direct upgrade. The new SAI uses an upgraded piston seal with two Y-shaped elements for low start-up pressure and long life. This non-magnetic SKU cannot take a switch.
The SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked. Rod material options include SUS304 stainless steel, and a Viton H seal raises operating temperature to 150C.
Airtac SI100 Standard Cylinder SI100BX300 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX300 |
| Bore size | Ø100 mm |
| Stroke | 300 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 SAI100BX300 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 SAI100BX300 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 SI100BX300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SI100BX300 Is Used
Heavy-Duty Pressing
Drives large stamping and riveting fixtures requiring up to 5497N of thrust at 0.7MPa operating pressure.
Pallet Diverting
Actuates heavy lane changers and stops for palletized goods, utilizing the 300mm stroke to clear the path.
Replacing the Airtac SI100 Standard Cylinder SI100BX300 with the SAI100BX300
To replace the SI100BX300, order SAI100BX300. Verify the ISO 15552 mounting interface, 100mm bore, 300mm stroke, G1/2 port, and M20x1.5 rod thread. Because this SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor. If you need position sensing, select an SAI model with the magnet option. For sizing flexibility, the 80mm bore neighbor offers 2513N push at 0.5MPa, while the 125mm bore provides 6136N. At 300mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variant, an external rod lock, or a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX300
- ✓ 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 SI100BX300 FAQ
Yes, the AirTAC SI100BX300 is discontinued. The direct replacement is the SAI100BX300. It shares the same ISO 15552 mounting interface, 100mm bore, 300mm stroke, force, and G1/2 port, fitting existing fixtures perfectly.
The G1/2 port bore delivers 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a maximum theoretical force of 801kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX300
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX300 replacement — usually within 7-8 hours.