hi I'm Cressel Anderson this is Makercise in this episode I make a centering
jig as an accessory to my lathe now this tool allows me to drill a center into
the end of 16 millimeter rod stock and I can get the center much closer than I
could previously I use 20 millimeter rod stock as the material for the centering
jig I put it in my Chuck and then I faced off the end sinner drilled it and
then I used a quarter inch drill bit to drill completely through the stock after
I had the center hole drilled completely through the material I needed to drill a
little bit of a recess in the end and this will slip over the stock that I'm
gonna be drilling a center in. I used successively larger drill bits to
enlarge that recess. there is some misalignment. this is the largest drill
bit that I own. it's 13 millimeter and when it's in the Chuck, and the Chuck's
in the Morris taper, and then the Morris taper is aligned in the tailstock there
is a misalignment. The end of this drill bit is a good couple
millimeters off-center. I can see it, but when I jam the drill bit in it tends
to find the center and stay in the center. There's no noticeable
spinning or anything so I think that must be something
fundamental to a lathe and why we're able to get iteratively better
precision from these machines but anyway it's just kind of an interesting
observation. Now I need to enlarge it because the stock that I need to make
the center for it's actually 16 millimeters so I've got to go a few
millimeters larger then my largest drill bit probably with a boring bar the next
problem that I've run into is this boring bar that I've got has this set
screw that I really need to get right up in against this kind of inside corner
and I think I have to use the angled side versus the kind of perpendicular
side like I typically use so I'm going to have to grind down the set screw that
is used to secure the tool in the boring bar then I need to grind a new insert it
goes into the boring bar so that way I can get back up in that corner one of
the things that I noticed very quickly was the chatter was a ton of chatter
with this setup and so what I tried was flipping the boring bar over and cutting
on the reverse side where the materials coming up that really had a good impact
I did overshoot the board just a little bit so if I make another one I'll make
it a little bit tighter I touched up the outside of the part with the belt sander
and then I test the fit with my Center drill now as it is right now this part
is a little too long and there's not enough of the center drill sticking out
the back for the chuck to grab on to so I had to shorten this up a little bit
I used my hacksaw to score a little bit of a line in the night hacksaw a good
little groove around it came back with my band saw and cut off that part I
flipped the centering jig over in the Chuck and then I faced off the back side
of the centering jig after shortening the centering jig up there really should
be plenty of the center drill it's sticking out the rear of the jig for a
chuck to grab on to I made this centering jig to support
construction of the shaper and one of the next parts that I need to make is
the down feed screw now this part is turned from 16 millimeter rod stock so
that's why I made this centering jig and I basically just put it over the end of
the rod stock line it up with the drill press lock in the vise to the table and
then I drill the center in the end of the stock now the centering
jig isn't perfect so I've still got a little bit of run out but I think it's a
lot better than my previous method which I feel like is more a problem with the
rigidity of my drill press than my actual ability to locate the center on
the parts this seemed to help with turning the shaper down feed screw
I hope this project builds your confidence to exercise your inner maker
if you liked this video please click the like button and if you're enjoying the
project consider subscribing I have been making progress on the shaper I have the
down feed completed and I'm gonna be moving on to the clapper box and clapper
block hopefully later this week thanks for watching

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