Cherryville Chuck· Retired Moderator
Shaper bits come in a variety of bores and some advertised having router adapters which I assume was an arbor that had a collet. If you could find a 1/2 arbor for router bits you could use a reducer but I don't know that it would work very well. Shapers turn a lot slower than routers and small bits like 1/4" need to turn pretty fast, at least 18,000 rpm I would say. Shaper bits come up with some regularity on ebay but you need to get ones with the bore that are compatible with the one on your machine. The shapers with 1 1/4" bores are usually around 5 hp plus I think.