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post #1 of 14 (permalink) Old 04-27-2014, 08:35 AM Thread Starter
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Default Parts for Delta DP250

The rear motor pulley on my Delta drill press exploded into pieces. Seems that they had a problem on the 250 and 350. Parts are no longer available according to most part replacement websites.

The part # is AO8514 for DP250/350.

Anybody have an old one to part out? Thanks.
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post #2 of 14 (permalink) Old 04-27-2014, 09:38 AM
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Ted it isn't very often that you come across a pulley that is really unique. Mostly it is an issue of bore size and diameter and any dealer specializing in power transmission products should be able to fix you up. It looks like the rim is offset from the hub but that might not be that big of a deal. Check and make sure if a pulley that has a hub and rim that are coplanar will work before you go looking for a replacement.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 14 (permalink) Old 04-27-2014, 11:38 AM Thread Starter
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Ted it isn't very often that you come across a pulley that is really unique. Mostly it is an issue of bore size and diameter and any dealer specializing in power transmission products should be able to fix you up. It looks like the rim is offset from the hub but that might not be that big of a deal. Check and make sure if a pulley that has a hub and rim that are coplanar will work before you go looking for a replacement.
This is also the drive pulley for the drill press. There is a spring on the shaft above the pulley that allows the pulley to move up and down slightly for the variable speed. Probably one of those engineering ideas that looked good on paper.

Delta did acknowledge the problem and did offer a fix but that was a few years ago.

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post #4 of 14 (permalink) Old 04-27-2014, 03:28 PM
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Do you need variable speed? If you find that you mostly use one speed then set the new fixed pulley at that height. It's not an ideal fix but it is better than throwing it away.
There also may be one other option. My 16.5" Delta uses a step pulley on the motor as shown in the linked diagram. Is it possible to replace yours with one of those? Delta 17-900 Parts List and Diagram - Type 2 : eReplacementParts.com

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post #5 of 14 (permalink) Old 04-27-2014, 04:15 PM Thread Starter
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Do you need variable speed? If you find that you mostly use one speed then set the new fixed pulley at that height. It's not an ideal fix but it is better than throwing it away.
There also may be one other option. My 16.5" Delta uses a step pulley on the motor as shown in the linked diagram. Is it possible to replace yours with one of those? Delta 17-900 Parts List and Diagram - Type 2 : eReplacementParts.com
Thanks, Chuck. I thought about that option. You're right, it is better than using it for a boat anchor. If I can't find the part, that's probably the route I'll go.

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post #6 of 14 (permalink) Old 04-27-2014, 06:55 PM
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I don't know anything about Reeves drives, but owwm.org (Old Woodworking Machines) has a pretty steady flow of people rebuilding vintage Powermatics with that type of drive system. Also, Steel City (maybe others) uses a Reeves in their 17" drill press--you may get lucky with an interchange part as well. Finally, using "Delta Reeves Drive Pulley" in google will get you some possible paths to pursue.

Good Luck!!

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post #7 of 14 (permalink) Old 04-28-2014, 09:25 AM
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It's been a few years, but I had that problem on my DP-250 too. The pulley itself isn't bad. It's just a small manufacturing defect that's easily corrected.

If I remember correctly, there is a hole for a roll pin that was drilled slightly too large, allowing the roll pin to fall out. I went to the next size larger roll pin and drilled the hole out to the proper size to fit it. The pulley just needs to be re-assembled. In the correct orientation the fingers of each half of the pulley fit together like a box joint. The spring is there to hold them together until you adjust the speed higher. The belt tension will force the halves of this pulley to spread apart as needed when the pulley at the spindle end closes up by the speed change adjustment. I'll try to look at it again today to refresh my memory and will add to this post if I see anything else that may help.


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Last edited by CharleyL; 04-28-2014 at 09:28 AM.
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post #8 of 14 (permalink) Old 04-28-2014, 04:14 PM Thread Starter
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It's been a few years, but I had that problem on my DP-250 too. The pulley itself isn't bad. It's just a small manufacturing defect that's easily corrected.

If I remember correctly, there is a hole for a roll pin that was drilled slightly too large, allowing the roll pin to fall out. I went to the next size larger roll pin and drilled the hole out to the proper size to fit it. The pulley just needs to be re-assembled. In the correct orientation the fingers of each half of the pulley fit together like a box joint. The spring is there to hold them together until you adjust the speed higher. The belt tension will force the halves of this pulley to spread apart as needed when the pulley at the spindle end closes up by the speed change adjustment. I'll try to look at it again today to refresh my memory and will add to this post if I see anything else that may help.


Charley
No drilling out this pulley, all I have is a hand full of busted pot metal. It literally exploded inside the upper enclosure of the drill press.

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post #9 of 14 (permalink) Old 05-01-2014, 09:18 PM
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Sorry to be late getting back to you. A heart attack put me in the hospital Monday afternoon. I had heart surgery on Tuesday and came back home on Wednesday with a new diet and a light duty mandate.

I guess I just assumed that you were having the same problem that I had a few years back. I just fixed my original pulley. I now understand why your pulley can't be fixed. OEM Replacement Parts | DIY Repair | eReplacementParts.com shows the pulley as a discontinued part and the new Delta Machinery Company seems to be concentrating their efforts on new larger tools, but you might try contacting them through their website to see if they can help you Delta® Power Equipment Corporation - Home . They are located in Anderson, SC now.

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Last edited by CharleyL; 05-01-2014 at 09:20 PM.
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post #10 of 14 (permalink) Old 05-06-2014, 06:16 AM Thread Starter
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Default Parts update

RenovoParts is probably the 'go to' vendor for obsolete Delta/Rockwell parts. They stock some used parts and also machine new parts.

The Reeves Pulley that I need is out of stock now but hopefully by the end of the month I'll have the part. Approximately $45 for both pulley halves.

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