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Anatomy of an F Coupling

The Falk F coupling was so well designed that even though it’s now obsolete (replaced by the updated T coupling), it’s still a commonly used and requested surplus part. With its rugged grid design and superior protection against shock and misalignment, the F coupling offers many advantages.

The following is a look at how F couplings are put together – and why they’re so reliable:

1. Resilient grid. The grid on the Falk F coupling is made of high-strength steel, which has been quenched and tempered to spring hardness. The grid is primary load-bearing component, and its ability to flex is what allows the coupling to accommodate shock loads.

2. Cover. The F coupling is protected by a heavy-duty steel cover that floats on the hub teeth and allows free articulation of the grid. It also features wide flanges and narrow shrouds to make assembly a snap.

3. Hubs. Made of high-grade steel, the hubs have teeth that interact with the grid but are not attached to it, allowing each hub to correct shaft misalignment by shifting without imposing a load on the other.

4. Seals. The interior of the F coupling is protected by synthetic seals that are impervious to oil and grease. Their wide shoulders prevent lubricant loss as well as bar water, dust and other contaminants from entering the coupling.

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