Routers, like shop vacuums and bench leading planers, operate on a global motor. Shapers, like most table saws, jointers, and also fixed planers, work on induction motors. One method to look at the difference is that, reasonably talking, universal motors offer high rpm as well as low power, and induction motors provide reduced rpm and high power. This doesn't imply that there's anything wrong with asking a great deal of universal electric motors.
As an example a variable speed router might have a speed range of 12,000 to 21,000 rpm controlled by a variable speed dial. The rate variety is unlimited in between settings. A shaper most likely runs at two speeds, around 8,000 as well as 10,000 rpm, managed by moving a belt on a step wheel. For shops that expect almost continual day-to-day operation of their tools, an induction-based shaper makes even more sense.
A two-wing router bit at 21,000 rpm offers 42,000 cuts each min, which becomes part of the reason for the great cut top quality you commonly see from router bits. A two-wing cutter in a shaper at 10,000 rpm would only offer 20,000 cuts per min, so cut quality can suffer. The service? Most shaper cutters are four-wing as opposed to two-wing which, as a rule, also makes shaper cutters a lot more costly than router little bits.
Speaking of little bits, you could encounter a house fixate Sunday afternoon as well as locate a pretty good assortment of router bits. You will not see shaper cutters. Given that shaper cutters are much more specialized, you'll normally only locate them at specialized sellers. It's hard to beat a router in a router table when it comes to flexibility. For the most part, my router 'lives' in my table-- full-time. They're simply made in a different way.
The most significant panel raiser you could run on a router is 3-1/2 ″ size. When making large doors, the smaller sized account offered by a router little bit occasionally does not look to scale on the job. Finally, if you're shopping, you'll see that some shapers include a router collet, making it resemble you could have the most effective of both globes by being able to run router bits in your shaper. It'll work a little tougher, as well as enable even more product to be removed per pass, than a router.
Currently consider just what's happening when you reduced wood. Certainly, you can. Yet if you chuck up a 1/4 ″ round over bit in a shaper, going for 10,000 rpm, you won't enjoy with the cut high quality. However if I require it, I can pull the router out and utilize it hand-held. Difficult to do that with a shaper electric motor. Shapers are wonderful for running the big size panel elevating router little bits, which require a low rpm anyhow, yet not so good for little size bits.