Re: [CAD_CAM_EDM_DRO] Router life, getting better bearings,

Hi Brent;

Before you can make a determination about buying higher quality bearings
it would help to know why the originals failed. I would ask for the
orignal parts back or rebuild the next one myself so that I could get a
good look at the bearings. Plus I'd want to make sure that it is
actually the bearigs that have failed and not the mounting
arraingement. Wearing out after a 100 hrs seems pretty bad on the
surface but we don't know all the ins and outs here of what happened to
the motor.

Thanks
Dave



thorcnc wrote:

>Hey all,
>
>I have been using a 3.25Hp Porter Cable 5-speed router on my CNC
>table, and I am finding that the bearings are wearing only after
>about 100 hours of use. I've just worn the bearings on my second
>router (purchased while the first one was being rebuilt, complements
>of Porter Cable). I see the wear by the amount of axial end-play --
> .010" is too much for me and too much according to Porter Cable.
>
>I thought I read a post that someone had their PC router rebuilt with
>better bearings? Have any of you done this? How much does this
>improve the life between rebuilds?
>
>Does anybody have suggestions for a better single-phase current
>router suggestion? The repair shop I went to stated that Porter
>Cable is pretty much the best for single phase, but I wanted to check
>with your experiences.
>
>Another question re: Speed control on routers. I'm finding my PC
>3.25Hp can really start to hunt for the correct speed when under a
>pretty heavy load. This is at either 10K or 13K rpm. I'm trying to
>keep the speed down for proper feeds & speeds. Ideally I'd like to
>have some more speed flexibility than 10K-21K rpm so I can use some
>larger bits, such as 1/2". (By the way, I mostly cut very high
>density foam, not metal.) Any suggestions?
>
>Thanks in advance! Great forum!
>
>Brent
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