Problem with one of the pulley wheels on progress drill

[phill d]

Hi guys.
well today I had a look at my (new to me) HUGE bench drill.
its an Elliott progress 1 (bench model).
First of all everything seemed fine and dandy, plugged it in to the 240volt ,switched it on and hey presto perfect, smooth running and everything fine.
Then I decide to change the belt setting and put it on highest speed, perfect ran like a dream again.
Then I decide to put it on slowest belt speed as it was on medium when I got it Saturday morning.
When I changed belt speed to slowest running it was slipping bad, first I just thought I had not extended the motor correctly to tension the belt, and "THEN I NOTICED IT", the bottom lip on the smallest bottom v has come apart from the rest of the pulley.
Its a very clean cut and has probably polished itself that way in use before I got it.
I have not yet taken the pulley off the drill yet as i can use it for a couple of things as is tommorow.

Now this is where someone else maybe able to help .
I am needing to know if this pulley could be welded ?
or is it a metal that's not really upto taking a weld ?
its a grey colour and don't look like a quality type metal to be honest, pretty sure its not cast iron.
but maybe looks are deceiving and its a solid steel item ?
I would like to keep its original pulley if possible, this pulley is the one on the electric motor.
and its the very bottom smallest diameter v section.
the one I need to give me the slowest speed for stainless drilling on my outboard engine propellers.
I have an arc welder and access to mig welder too, so if it is a decent steel I could possibly repair it.

any advice on this would be very welcome.
by the way this is my first bench/pillar drill and first time playing around with PROPER DRILLS.

phill

 

[scott0031]

What you are experiencing is not at all uncommon with this age of drill. The slowest speed is the one that is most used for general work hence being a quality drill that lasts years the bottom pulley lip literally wears off. I have one with the exact same problem, as of yet i have not had got around to tigging it up. I cant 100% answer your question if its weldable. My experience says it will be perfectly weldable as its old and British therefore the casting will be a good one. They are made of ally so tig is required. It will need machining back once filled/ built up as that part of the lip will be very badly worn, so just tigging it back on will probably not work to any degree of success.

kind regards,



Scott

 

[phill d]

thanks scott, atleast I know im not alone with the pulley problem. TIG is something I don't have.
But if its tig needed then ill get it done in a machine shop near to me. (I hope). yes it does look a bit thin to be honest.


regards
phill

 

[Rig Pig]

If you can't get it welded and have access to a lathe you may be able to machine it off and fit a new bottom pulley pinned or screwed to the pulleys above.

Pop some pictures up so we can see the problem.

 

[phill d]

Now that Idea is pretty good Rig Pig.
I was thinking on the similar lines of getting a small single pulley and mounting it under the original once its cleaned up etc.
will go to garage now and take some pics of it and post in a while.
not sure how easy its going to be to take it off and have a good butchers at it !!!



phill

 

[phill d]

ok so here is a pic of the break in the pulley. I think the pulley is some sort of alloy or other weak material, NOT steel.
As you can see its a clean break and or wear etc.
its held on with a grub screw through the side and also a key way down the bore/shaft.

It would seem that its squatting and not wanting to be evicted from its home just yet, but tomorrow its going to be getting the BFH and a bit of
heat and whatever it takes to get it off. me being impatient this could mean severe damage to the pulley and anything within 6 foot of it. !!!
I have a harmonic puller and a hub puller and slide hammer, but this would just shatter I think if I put much pressure on it ?

any idea how to get this off ? or is there an EASY way ?
so far it does move on the shaft a tiny bit, ive got it coming up about 1/16th and then back down pretty easy ish and ive left some oil on it over night.
I think where the grub screw at the side of wheel goes is what is causing the stickage, (yes stickage, same as stuck but more of a ba**d to free it ).

.

and I wonder how old the belt is ? cozens of Wolverhampton ?



phill

 

[lshigham]

Cozens are still going so may be reasonably new, doesn't look ancient

http://www.cozensandcole.co.uk/index.html

 

[phill d]

yeah I looked them up (cozen's).
then realised I delivered some freight to them a few years back.
the belt does look in very good condition to be honest.
I know the machine was in use up until 2012 being used by a sea cadet workshop and passed its safety inspection at that time.
there is still two stickers on the machine, 1 from 2010 and one from 2012.
I think now it would need a different on -off switch for workshop use due to health and safety stupidity rules.

I think I will have to make up a plate to go under the bottom pulley and use harmonic puller to get this off, I realy don't want to
damage it incase I cant get another one. !!!
if I can I think I would prefer to get a cast iron pulley as a replacement, not sure yet what sizethe shaft it.
it is a hoover 1/2hp 240 volt 1425rpm with a type number 7203HBF1320Z. and its got a big capacitor on the back.
i think its 5/8ths but until its off and I can measure it im not 100% sure.

phill

 

[ben8vgte]

I damaged the motor pulley on my progress trying to get it off, lots of heat helped in the end and off the top of my head 5/8" sounds correct. Fairly standard pulley picador type pulley I think, Chronos do them I think when I was looking recently http://www.chronos.ltd.uk/engineering-tools/2011/new-from-chronos-alternatives-to-picador-pulleys/

 

[phill d]

what I am thinking of doing is making a nice strong plate up and go under the bottom of the last good grove.
I am thinking if I make it angled to fit the groove taper I might get a chance with a puller to ease it up, I will make it a tight fit. ?
I don't know if the key is half moon or just flat key on a press to tighten fit, but I have put some oil down the key way and did apply a bit of heat with just a
propane blow torch (canister type), and I did notice a tiny amount of oil escaping from the bottom of the pulley so might get it to lift up a bit more tomorrow.
I was doing this by torchlight in the freezing cold, so not exactly the right time to be doing it.
with plenty of daylight and wrapped up better for the weather I might get a few hours to mess around with it.
I think brute force will just destroy it, I need patience !! something I lack im afraid.
I don't think this one is going to be repaired to be honest, it looks a bit thin on the very bottom.



phill

 

[Rig Pig]

The more contact you can get with the pulley the better, if you point load it you risk further damage, the split plate sounds good.