Question concerning Sergents couplers

[jbaakko]

I just read through both of the articles on the Sergents once more and noticed that they make a standard shank coupler and a narrow shank coupler for use in scale size draft gear boxes. That got me to wondering, would they work on a tighter radius if you were to use the narrow shank models in a standard Kaddee draft gear box?

No.

The shank remains the same width. The retaining pin hole is molded smaller and the area around it is narrower, to fit into the narrower box.

Russ, if you plan to go to Sergent couplers, I'd recommend buying some of the dummy Gatzl couplers, or making conversion cars, avoid the kadee-sergent coupling.