RE: [mill_drill] Re: Harbor Freight Mill/Drill 33686 Bearing ?
The “abec-7” is also the part that drives the bearing cost up. Higher the number, better the bearing. Roller skaters, roller bladers, and boarders always want -5 or better when changing bearings.
I am 100% going to change the bearings, it's more a matter of which bearing to use, tapered roller or angular contact.
--- In email@example.com, Guenther Paul wrote:
> Check the bearing race ( the taperd cup ) it you find wear or a rige in it i
> would by all means replace the bearings
> Â GP
> From: Druid Noibn
> To: firstname.lastname@example.org
> Sent: Mon, February 25, 2013 8:56:28 AM
> Subject: Re: [mill_drill] Harbor Freight Mill/Drill 33686 Bearing ?
> Hi Frank,
> Just an additional 2-cents worth....
> Like the others, I do not see an advantage to replacing the original tapered
> bearing with the angular contact type.Â The added cost for the new bearings
> won't translate to benefit in the operation of the machine.Â I do see that the
> newÂ AC bearings are likley toÂ get beaten-up a bit due to the application. Â
> Get new taper bearings and races - clean out the old crud and well-lube the new
> ones - pay good attention to instlaltion and all will be well.
> Take care,
> DBN Â Â
> --- On Sun, 2/24/13, olds7d442 wrote:
> >From: olds7d442
> >Subject: [mill_drill] Harbor Freight Mill/Drill 33686 Bearing ?
> >To: email@example.com
> >Date: Sunday, February 24, 2013, 10:08 PM
> >I have a harbor freight mill/drill and I took out the quill and spindle to check
> >the bearings. The grease was old and the bearings are made in China. The
> >bearings are a tapered roller bearing part #'s 30206p5 and a 30207p5. I decided
> >to just replace them with a quality p5 tapered roller bearing with brand new
> >grease and call it a day. Well. I got to thinking, what if I was to replace
> >these with an angular contact bearing. The bearings I was looking at have the
> >exact same dimensions as the tapered bearings and are a 7206p4 and a 7207p4.
> >Here is a link to one of the bearings on ebay:
> >The bearings are obviously a lot more expensive then the tapered roller bearing
> >and I was just wondering if:
> >1)I was wasting my money with this type of machine.
> >2)Is there a benefit to angular contact over the tapered bearings in my
> >3)Has anyone ever done this on this machine before?
> >Any and all answers are greatly appreciated.
- I am not sure what your milling table looks like but would you be able to
mount your tools on an adapter plate? I have this small vise attached to a
3/8 steel plate. It makes for very quick angle set-ups on the mill and
will bolt down to many of my other fixtures.