I'm thinking about building some kind of belt sander / belt grinder for 2-inch wide
belts and for that I need to mount that bearing inside of a wheel and this drill
drills this size hole which is almost perfect except I need that bearing
actually to be in there a bit tight so I need to resize the drill oh it's perfect
now I actually want to put the bearing in on this side with a finish on it so I
have to transfer that Center location
now I need to press in those bearings
now I actually need a third layer to make the wheels thick enough for a two
inch belt. As soon as I put glue in there this will want to float away on me so
I'm gonna use two screws as alignment pins so now I'm lining up the holes on
the inside and now I can apply glue now for glueing the last layer on the
alignment with the bearings is quite critical that runs pretty good on its
own and this layer also pretty good
that's close enough
the other wheel is much smaller and I'm just using roller skate bearings and I'm
using the same procedure to true-that up
the outside here isn't exactly smooth so I'm going to try to rough from it with
this jig on the bandsaw
the bandsaw blade wasn't stiff enough it just kept moving either way as I pushed
against it so I couldn't get a really precise surface so now I'll try trimming
it up on the table saw because that's much stiffer and to get along here I'm
actually going to slide this along the shaft and that makes sure this surface
is going to be parallel to the shop
so by raising the blade on either side I was able to put a bit of a crown on it
like that and that's needed to keep the belt tracking properly now I just need
to build the rest of the machine I realized this wheel is a little bit out
of balance but the problem is these bearings don't turn easily enough for
this to a rock back and forth so it's hard to balance so those thinking is to
just roll it on bearings from rotor bits basically on the inside like that and
rather than make a special jig and take the bearings off the rotor bit like just
use two rotor bits and put the wheel in between those two here's where it's at
now the axle for the bottom is going to be supported on just one side I will
probably add another layer here to give it more support and then on the top I
need something to apply tension this is just to hold it in place because I don't
have enough hands so I had been thinking of selecting the back home forward so
that's the stuff ends up vertical in the front but the sand are supposed to
accommodate different lengths of belt so I think I'm better off making this
bracket come out way like this so that as this moves up and down I'm still
vertical on the front edge these two pieces of plywood will make that bracket
and to make sure the hole is in both pieces in the same place I drill them
together and now I just need to glue that together this part very precisely
I'm gluing this bracket together one side at a time so I can get the
alignment better and add this block in here to stiff it against twisting and I
realized I need to extend this slot a little bit like this so now I have to do
that with a handsaw
and now I'll just rely on my workbench and the square to keep this part aligns
this way and that way
yeah Belt is tracking a little bit to the left right now and my plan is to
have a screw pushing this shaft back which pushes it back and up a little bit
and between those two that should really move that belt to the right
but for now let's just put a nail in here let's see what happens now this
does not quite have the effect that I was hoping it would have maybe I need
more know if it was the wrong way I don't know what's going on here I need
to work on that tracking a bit more but I think first I need to attach these
pieces together a bit better so it's more stable
so this is a wooden spring that goes on here for belt tension like this and I
wanted to use one of these knobs because I got a whole bunch of them but
unfortunately it's too short so for now I'm gonna use just a bolt with a nuts
type knob on it that gives me more range
shit so I think I know now why my tracking isn't working very well if I
take this end of the shaft and I move it forward by putting a screwdriver behind
it that makes the belt truck this way now let's come back now if I lift this
side of the shaft I put me a screwdriver under it that
also makes the belt track this way so basically to move the belt away from
here I either have to lift it or bring it forward or ideally both but this lot
goes this way so I'm lifting it making it track away but I'm also moving this
and back making a track this way so they cancel so the slot is the wrong
direction this slot needs to go this way so I've got this lock butchered out to
go this way and instead of pulling on this shaft to go up this way I now need
to push on it like that so I'm still going to use this same part but instead
I'm going to have a knob in here that pulls it this way which means I need a
threaded hole right here
and now using a thread tap on that
alright I now have trucking control that works
so right now the belt is tracking right in the middle and if I take the trucking
knob and turn it this way belt goes that way and if I turn it the other way and
the belt comes this way and back on center so there's quite a bit of work
left to be done on this but before I go any further I need to decide which motor
I'm going to use and have already been messing around trying to figure out
which of these motors I'm going to use but I'll save that for another video it
runs so smooth