Re: [mill_drill] Re: Harbor Freight Mill/Drill 33686 Bearing ?
- Thanks. Okay, to make a long story short, what would you put back in. Tapered roller bearings (what was in there from the factory) or angular contact bearings?
From: Tony <ieezitin@...>
To: mill_drill <firstname.lastname@example.org>
Sent: Mon, Feb 25, 2013 7:34 pm
Subject: [mill_drill] Re: Harbor Freight Mill/Drill 33686 Bearing ?
the difference between taper roller bearings and ball bearings is friction.
There is more surface contact between roller bearings than balls.
The precision on both should be equal when getting into both ball race and roller race.
Taper roller bearings take more loading, saying that the loads that are encountered in machining( being a lathe or a mill are low compared to the loads seen in a car wheel hub for example).
that's it in a nut shell.
Angular contact precision bearings have been used in machining since the conception of machining machines.
Saying that: machine manufactures have been promoting taper roller bearings in there head-stocks spindles for years under a false premise.
Pre loaded bearings are another animal (both taper and ball) installation of such bearings need attention.
Hope this cleared your journey through the bearing world.
- 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.