hello welcome to enots engineering i'm Alan well this month i've been doing some work on my shed
having to replace two sides of the shed due to the age and the weather the shed is over 35 years old
so i was using my screwdriver my nails and hammer gun a lot and
i found this screwdriver bit which you fit into electric drill wasn't
holding the screws as well as it used to and sometimes it would round the inside of the screw off
so you couldn't get a good drive on the screw i wondered whether you can sharpen these
up and reuse them i've already thrown one in the dustbin which i've retrieved
and we're going to sharpen one of these up and see whether we can reuse it
so let's go into the workshop see how we do it
i've been doing some work on the shed and i've replaced
the front and the side of the shed the door is now on the side originally it was on the front
and this as you can see is the side that gets the most sun
so all the wood on these two sides has been replaced because it was all warped and dried out in the summer
and soaking wet in the winter i've replaced all the wood repainted it
i noticed that my screwdriver was slipping
this is what i've been using for the screws
a double ended screwdriver that fits in an electric drill these are super screws
i found that when they first had this screwdriver attachment this double-ended screwdriver
It was very good and over the years I've noticed that its started to slip
once the screw head's been damaged it slips even more
and i noticed that the edges on the screwdriver have been taken off
and i think that's why it slips so i was wondering whether i could
sharpen this up to give a nice sharp edge so that it doesn't slip as much in the screw
now if you look at the edge of the screwdriver under the microscope let's get this in focus
you can see where it hasn't come into contact with the screw the edge is quite sharp here
and where the screw has come into contact it's tighten the edge of the screwdriver away
and once that edge goes screwdriver slips more so it starts slipping the more you use it more it slips
i was looking at this the other day and i thought i wonder if we can sharpen that in any way
by taking some off this edge and moving the whole of the screwdriver down
so it starts operating on the unused part here
i don't know whether it will sharpen up or whether it'll work
but i was going to throw it away so i thought i'll have a go just in case i could save it
and use it for another few months
i've come over to the taller cutter grinder
i've still have the attachments on that i use for sharpening some drills up a few days ago
and it's still set for drill sharpening so what i want to do is
find a collet that will fit the screwdriver a bit so i can hold it in the end using the wheel just sharpen up the
last quarter of an inch of the screwdriver bit to remove the worn part away
this is myER20 collet set and what i want is a collet that will hold this
hexagonal that's too big that might do it i'll just try that one which is a 7mm collet
take the nut that fits into there and that should fit into there
so go back to the tool and cutter grinder and see if i can set up on this angle
on this stool and got the grinder here i have a tray and it's just got oil in that goes under
the wheel and that catches probably half of the grit and dust that comes off the wheel
so it's worth doing and it stops all those bits of grit going around the workshop
this wheel is a diamond grinding wheel i could change it for a stone wheel but it's
just not worth it for the amount of grinding i'm i'm going to do it's only a very small part
so i'll set this up to hold the screwdriver
and this is the collet we chose
and that should hold the screwdriver a bit
i'll put the bit in
onto the hexagon
undo this and this can turn to meet the same angle as a screwdriver bit
which on this one looks like 60 degrees
okay i've set the angle of the screwdriver a bit
and now i'll turn the wheel on and just go across a few times to see
what it's grinding like
move it closer to the wheel
i'll just grind some more material off
let's take that out and see what it looks like
that fits better now
I will have a look on the microscope see what that's like
this is now the old edge you see
this looks fairly blunt compared to the new edge i've just put on the end
lets have a look at the other
you can see the the new edge it's taken away all the rounded off part
and i've got quite a sharp corner on there now
so that should grip the screw a lot better if i compare that
to the old one which was on the other end
you can see how the edge is completely gone on that one
so what i'll do is go back to the grinder grind the tip on that first and then redo the edge
i'll reset the angle and we'll grind the outside
okay i've reset the angle to 60 degrees and i'll now grind the outside of this screwdriver
see the screw will hold on that
wouldn't hold in there before so i'll take that out now and we'll
have a look under the microscope as i take it out all i do is under the collet
slide it out
on this fixture the collet holder for er20
the spindle goes through on the end of the spindle i've got this dividing ring
I can turn it round and there's a pin that comes through the side here that goes into either of these holes
then this here will feed in
the part into the wheel
now it does have some limitations here because it's working in a groove
you've a bit of playing there so you always must always keep the pressure on the
spindle forward this is just a lock screw so i'll put that on slightly so there's some pressure on
and if the pressure does come off the locking part there will hold it and stop it pushing back
i've thoughts trying to think of some way of putting the dial indicator on here
so i can actually see a visual position of how far i've gone in
so if i'm doing a drill or something undo each side exactly the same
at the moment i i do both sides roughly and then coming to the stop and then turn it round doing
both sides to get them the same but it would be nice to know how far you're fed in and out
and then on the this part here it's just a screw that locks the table so you can set the angle
lock it again and this pin that locks into the dividing ring
once i put the pin in that stops it twisting turning on here but you can also still
moving out the pin is in an elongated hole so it will once it's locked in you can still move it
in and out to put the feed on the wheel
then you can see there you can get a good eighth of an inch
feed on there which is ample for most sharpening requirements it's a microscope again so if i find
the edge there we go you see i've ground that i've left actually a bit more it's not the edge
is sharp but it's still got a weakness on there you can see on this end of the screwdriver blade
i've not removed all the worn parts it still shows some wear there let me see if i can move
it around a bit here the white is the wear on the edge but it has got a sharp edge on the part
well that's a lot more positive than it was i don't have to put so much pressure on
let's try the other end
it's a lot better well that's saved that screwdriver tip
well that's it for today hope that was useful hope it's interesting and we'll see you next time on Enots engineering