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[kyanite_cutie]

What would be the easiest way to replace the "sandpaper?" on the wheels?

Thank you for your help!

[jakesrocks]

First off, congrats on owning a fine piece of vintage equipment.

You don't say if those are cam lock or expando drums. Given the age of the equipment I'm guessing cam lock, or as us old timers call them, bump wheels.

With that unit I'd remove both wheels & start out with 2 brand new expando drums. They're a bit expensive, but well worth it. That looks to be an 8" unit, so buy a selection of either silicon carbide or diamond belts to fit the drums. If you're new to the hobby, I'd start out with silicon carbide. Those diamond belts are expensive. With the motor turned off you can just slide a belt off of a drum & replace it with which ever grit you want to use next.

I should add that expando drums are meant to be used in only 1 direction. New drums should have an arrow on them to show which way they should spin. Also, never run an expando drum without having a belt on it, unless you want pieces of rubber chasing you around your shop.

Is that the arbor that was on ebay ? If so, I almost bid on it but decided that I have enough arbors already.

[bobby1]

Most newer silicon carbide belts don't have a directional arrow, or they have a double ended arrow signifying they can go either direction.
Bob

[jakesrocks]

Not talking about the belts. Most expando drums have an arrow on them when new.

[peruano]

Just to clarify what Jake is saying. Yes there is only one direction of turn for an expando wheel.  It has rubber bevels that let it flex with the centrifugal force to tighten the belt when running and loosen it when not turning.  Mounted incorrectly and it won't expand.  If you have a belt that tends to creep (and you know the wheel is mounted correctly), you may need to increase the speed to make that expando expand better.  The way to recognize a thumper (or bump) wheel is that it has a slit across the entire face of the wheel that allows the new sanding belt to be clamped in place. An expando uses a continuous belt.  Expandos are wonderful and especially so for folks who do not have large workshops or big bucks for diamond wheels.   The changing of belts as one works through the grit sequence is a bit of a nuisance, but it does best if you work in batches rather than working one stone through the entire sequence. 

[kyanite_cutie]

First off, I have no idea what a cam lock or expando drum is. I tried looking up the manual for this equipment but found nothing. Thank you very much for telling me I need to get two new expando drums. I will look into that. Should I put silicon carbide on both of the wheels or drums. The wheels are the drums right?

It was not on ebay. I am helping a 60 something year old quarry owner set up a lapidary studio in his garage. I have 5 other pieces of equipment to post pictures of to get some feed back for but I am not sure if that would be considered spaming this forum with my current lapidary troubles.

Thank you so much for the replies and the help. I honestly feel like I maybe in a little over my head.

[hummingbirdstones]

Asking questions and posting pictures of equipment you are asking about is not spamming the forum.  Feel free to ask any questions and post pictures so our members can help answer your questions for you.   

[Jhon P]

Is there anouther arbor? So that one can be set up with a couple of hard wheels and one can be set up with expandable drums. There can be 6 to 10 steps in making a cab.  Post picture of what you have and you will get pleanty of help

[Back]

Hi and welcome.

Dont be shy and post pictures of your other machines. If your are trying to set up a shop pictures of all machines would be very helpful. You may have a full shop worth of equiptment and just dont know it yet

We are here to help.

Bless
Shawn

[jakesrocks]

I was going to post pics of a bump wheel & an expando to show you the difference, but Photobucket is down again. I'll try tomorrow.

[kyanite_cutie]

Here is one of the wheels.

[kyanite_cutie]

Here is the other wheel.

[kyanite_cutie]

The motor

[kyanite_cutie]

I know I need to hook up the drip system. I will take a picture of the one I have in a couple minutes. To get this equipment ready to be used I need to solve the problem of how to replace to wheels. Do you guys think they need replacing? Also any tips on setting up a drip system are greatly appreciated.

[kyanite_cutie]

The drip system