This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100BX650, 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 SI100BX650
The AirTAC Airtac SI100 Standard Cylinder SI100BX650 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 650mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100BX650, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100BX650
- 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 SI100BX650
The AirTAC SI100BX650 is a discontinued double-acting ISO 15552 profile cylinder with a 100mm bore and 650mm stroke. It delivers 3927 N push force at 0.5 MPa via a G1/2 port. The direct replacement is the SAI100BX650, matching the interface, force, and mounting. This SKU uses a SUS304 stainless piston rod (-B) for corrosion resistance, but lacks a magnet (-S), so it cannot accept a magnetic switch.
The SAI100BX650 upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. If higher temperatures are needed, a Viton H seal raises the range to 0-150 C. Note that standard cylinders drift on air loss; the cushion only decelerates. For load holding, consider the SAIL or BSAI lock variants.
Airtac SI100 Standard Cylinder SI100BX650 Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100BX650 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100BX650 |
| Bore size | Ø100 mm |
| Stroke | 650 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 SAI100BX650 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 SAI100BX650 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 SI100BX650
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×650 | 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 SI100BX650 Is Used
Large Press Ejection
Provides the heavy push force needed to eject formed metal parts from a 100mm bore press, with the 650mm stroke reaching deep into the tooling.
Heavy Vertical Lowering
Handles heavy vertical payloads where the SUS304 rod resists moisture, requiring external guides to manage the long 650mm stroke safely.
Pallet Diversion
Actuates large diverter arms on heavy-duty conveyor lines, using the G1/2 port for rapid air exchange to maintain high throughput.
Replacing the Airtac SI100 Standard Cylinder SI100BX650 with the SAI100BX650
To replace the discontinued SI100BX650, order the SAI100BX650. Confirm the ISO 15552 mounting interface, 650mm stroke, G1/2 port, and M20x1.5 rod thread. Because this SKU lacks a magnet, it cannot support sensing; if switches are needed, specify an SAI with the -S option and use current AirTAC sensors. The 100mm bore yields 3927 N push at 0.5 MPa (801 kgf max at 1.0 MPa); if undersized, the 125mm bore offers 6136 N. For the 650mm stroke, use external guides to prevent rod bending and side-load damage. Finally, a plain cylinder does not hold load without air; use an external rod lock or pilot check valve for safety.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100BX650
- ✓ 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 SI100BX650 FAQ
Yes, the SI100BX650 is discontinued. The direct replacement is the SAI100BX650. It is dimensionally interchangeable per ISO 15552, retaining the same 100mm bore, 650mm stroke, force, G1/2 port, and mounting interface.
The G1/2 port supplies 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 theoretical max of 801 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100BX650
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100BX650 replacement — usually within 7-8 hours.