Thread: Tool Post Grinders - Can A good one be made?

A few photos of the giveaway and the keeper. The armature pictured is from the latter. I swapped armatures because a number of the balancing weights were missing from the keeper's original armature.

With the correct pulley combination, it was originally good for 38,000 RPM.

With the motor removed and dumped in the Sulo bin, the remainder should fit in a Parcel Post bag. That's if you want it.
And Simon, it can sit in your shed for another ten years before you chuck it out.

BT

Originally Posted by Anorak Bob

A few photos of the giveaway and the keeper. The armature pictured is from the latter. I swapped armatures because a number of the balancing weights were missing from the keeper's original armature.

With the correct pulley combination, it was originally good for 38,000 RPM.

With the motor removed and dumped in the Sulo bin, the remainder should fit in a Parcel Post bag. That's if you want it.
And Simon, it can sit in your shed for another ten years before you chuck it out.

BT

Thanks Bob. That's a very generous of you. Have you thought about taking the motor to a motor reconditioner and getting it overhauled and re-balanced? You could possibly on sell it and recoup your money? Just a thought. Not trying to talk you out of sending it my way of course , I'm quite happy to pay what you think would be a fair price. In any case, it's a wonderful offer and I'm keen. It would give me a good basis or starting point to work from.

Hi Ian, thanks for the pics. You mention the rigidity issues from the base plate but but it looks like a fair amount of thought and effort went into building that.

Cheers,

Simon

Simon,

I will weigh the grinder with and without the motor tomorrow. The grinder that I am giving away for FREE is the one with the chipped paintwork and the disassembled rooted motor.

This one.



There are no brushes or brush holders and it could be too old to be able to obtain replacements from Dumore. One of the reasons why the 110v motor should be slipped into the bin.

Bob.

Thanks so much Bob! I assumed it wasn't the nice painted one, although it would be a shame if you accidently got them mixed them up!

WRT the motor, you are probably right. It probably does need to go to god, I just hate to see things thrown out especially good quality old things.
Me being the eternal optimist, I have emailed Dumore to see if they still sell parts such as brushes and brush holders for the motors. They will probably want a serial No. etc but it's a start.

Simon

Hi Simon,

I bought the "better" grinder from eBay seller Tissuescars about 9 years ago. It had been used at a place called Bell Engineering in Sydney? for one particular job. Tissuescars had a few of them for sale at the time. Mine was full of grinding dust slurry necessitating the replacement of the internal oil retention felts and wicks along with the bearings. I tried to purchase the felts and a few other parts from W. Sopko, the Dumore agents at the time - http://www.wmsopko.com/ . It all became too hard and I ended up buying the parts from Electric Tool Service who could not have been more helpful. Here is part of our email exchange which gives you some indication of pricing. This was pre Shipito and I had the parts sent to my brother.

I will provide you with a photo of the motor nameplate.

BT

Hi Bob,

Here are the prices for the items that you listed.
The part numbers that you referenced are the same for
your model 8365.

779-0004 oil wick @12.72 each
R646-0009 oil tube @$2.55 each
487-0014 1/8" collet chuck @$37.18 each
757-0008 dust thrower @$16.26 each
729-0035 spacer @$10.24 each

We can drop ship to New Jersey directly fom Dumore
VIA UPS.
The residential shipping charge is $10.57.
Prices are in U.S. Funds, and we accept all major
credit cards.

Regards,
Larry

[email protected]

Hi Bob,

Thanks for that. I had googled "Dumore motor parts" and W. Sopko was one of the many hits including a mention in a thread in another metalworking forum. I have also downloaded an owners manual for the 44 direct from Dumore. It has the exploded parts view. My experience with U.S. suppliers has been second to none and often leaves the customer service in Aus very much wanting.

I am confident that my Hitachi trimmer router (520W @ 30,000 rpm) will be a nice comfortable fit and work well with a speed controller attached to any TP grinder. However, the Hitachi green plastic will not look anywhere as nice as the original motor.

I'll have a gander at The Electric Toll Co.

Cheers,

Simon

Simon, all you need to do is rough the plastic up a bit and it can then be painted black or what ever colour you want, as you can get paints to go on plastic. Looking forward to WIP report.
Kryn

DSC_4474 (Large).jpg

Thanks Bob, I appreciate your time you are putting into this.

I have shot off a few emails quoting the serial number to see if parts are available. Interestingly, a google search of electric tool co. showed no results and when I copied and pasted the email address you gave me into an email, it bounced back saying it could not deliver it. Sadly, they may no longer exist. Perhaps they have gone the way of the Doddo along with many a US firm?

Laid up with man flue ATM. I thught it was just a hang over after downing a bottle of port and a bottle of muskat with my sister. At least now I get (some) sympathy from the rest of the household!

Cheers,

Simon

Overnight I received a couple of emails, one from Sopko, one from Dumore. They both state they still sell parts for the motor. Interestingly, I quoted the serial number in both emails and the reply from Sopko was that the number, 3866 was not correct and that all serial numbers are 4 digits starting with "8"

I sent them the photo you posted. Perhaps the 3 is in fact an 8 but difficult to pick up due to the age of the motor. We shall see what happens.

Simon

Hi Bob, would it be at all possible to paint the stone size, gearing and speed details and when dry, rub it with a bit of emery tape so that it can be read easily. PLEASE.
Also do you have the sizes of the pulleys, please, as it would make life a bit easier, rather than re-inventing the TPG.
Kryn

Originally Posted by KBs PensNmore

Hi Bob, would it be at all possible to paint the stone size, gearing and speed details and when dry, rub it with a bit of emery tape so that it can be read easily. PLEASE.
Also do you have the sizes of the pulleys, please, as it would make life a bit easier, rather than re-inventing the TPG.
Kryn

Kryn,

I'm feeling crap ATM with man flue so I'm bored out of my brian. Been watching youtube videos on the TV. Anyway, I downloaded the 44 manual which gives the speeds and the pulley combinations to achieve those speeds. Page 8
http://igor.chudov.com/manuals/Dumor...der-Manual.pdf

Working with the ratios and since No.1 pulley is the smallest and No.5 the biggest, if you pluck a figure of 1.000" for pulley No.1 then pulley No.5 much be 2.961" from here you can work out the rest...

Pulley No. Size

1 1.000"
2 1.389"
3 1.834"
4 2.234"
5 2.961"

Of course if you find pulley No.5 a little big at nearly 3" then just readjust the ratios. You can either start from the smallest and work up to the biggest of start from what you want your biggest to be and work back to the smallest.

Cheers,

Simon

Seen this? https://www.woodworkforums.com/showth...97#post1361997

Thanks Simon and Bob, some very handy information in that lot. Thanks again Gents Now to find the bits to make one, it should be better than using the Dremel.
Kryn