This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX300S, 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 SI100BX300S
The AirTAC Airtac SI100 Standard Cylinder SI100BX300S 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 SAI100BX300S, 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 → SAI100BX300S
- 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 SI100BX300S
The AirTAC SI100BX300S is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 300mm stroke. It delivers 3927N push force at 0.5MPa through a G1/2 port. The SUS304 stainless rod suits corrosive settings. AirTAC replaced this legacy unit with the SAI100BX300S, a direct sharing the same interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with CS1-B/DS1-B sensors.
Airtac SI100 Standard Cylinder SI100BX300S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX300S |
| 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 SAI100BX300S 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 SAI100BX300S 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 SI100BX300S
| 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 SI100BX300S Is Used
Heavy Press Clamping
Secures large metal castings during machining, using the 3927N push force at 0.5MPa to hold components rigidly against cutting forces.
Pallet Lift Gates
Actuates heavy loading dock gates; the SUS304 rod resists moisture while the 300mm stroke accommodates varied dock heights.
Bulk Package Diverters
Pushes heavy palletized goods across transfer lines, where the 200kg vertical lift capacity ensures reliable lateral movement.
Replacing the Airtac SI100 Standard Cylinder SI100BX300S with the SAI100BX300S
To replace the SI100BX300S, order the SAI100BX300S. Confirm the ISO 15552 mounting interface, 100mm bore, 300mm stroke, G1/2 port, and your specific mounting accessory. The -B rod is SUS304 stainless; the -S magnet pairs with CS1-B/DS1-B switches. At 0.5MPa it pushes 3927N; if undersized, the 125mm bore offers 6136N. For 300mm strokes, use external guides to prevent rod bending from side loads. A plain cylinder drifts without air; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX300S
- ✓ 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 SI100BX300S FAQ
Yes, the SI100BX300S is discontinued. The direct replacement is the SAI100BX300S. It shares the identical ISO 15552 mounting interface, 100mm bore, 300mm stroke, G1/2 port, and output force, fitting existing fixtures perfectly.
It uses a G1/2 port. Force ratings are: 3927N push and 3681N pull at 0.5MPa, 5497N push at 0.7MPa, 7068N push at 0.9MPa, and a theoretical max of 801kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX300S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX300S replacement — usually within 7-8 hours.