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[4]

Hamilton Sensitive Drill Press Restoration

January Project of the Month [3]
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wawoodman

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#2
I dunno. Moving the whole head and motor, instead of the table.

"Don't raise the bridge, lower the river!"
 

ecdez

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#3
I know, crazy design.

Here's something equally odd. The drill has two pulley arrangements for fast and slow speed. If you look at the first picture you see a largehand wheel on the side that raises and lowers the motor at an angle when it's turned. The handwheel has speeds on it ranging from 2850 / 880 at the slowest to 9350 / 2700 at the fastest. I'm sure the motor is not original but how would sliding the motor back and down change the speeds?

 

francist

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#4
Maybe it had a variable speed pulley on there -- like a Roto-Cone or Lovejoy ? You can get them where only one side of the sheave moves, so moving the motor up/down on the incline would also shorten/lengthen the motor to pulley distance. Just a thought, but I have two of those variable drives and they are slick that way.

-frank
 

ecdez

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#5
Interesting. Would that work with a flat belt also? The pulleys and the idler appear to be original and they're flat belt pulleys.

Wish it had a nameplate. Of course my Olivetti has a name plate and it didn't help at all :grin:.
 

francist

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#6
Hmm, interesting is right. Don't know if that would work then. I have one drive that uses a normal V-belt section, and the other which is considerably older -- circa 1920 -- uses a belt that is more flat than V. It's about an inch wide with much shallower angle on the sides, so kind of a hybrid. They're still made, Gates I think, or TB Woods. Whether something like that would work on your pulleys is hard to say without closer knowledge.

-frank
 

Ebel440

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#12
Plenty of drill presses move the whole head for adjustment. If its a gang or bench mount its usually the only way as the table is the base. Some are counterweighted or they will use a screw like this one. That's about the only thing on this machine I would actually consider normal.
 

Nogoingback

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#14
If you send an email to one of the mods, they might be able to help. The main page shows which of these guys are online and a contact link.
 

RandyM

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#15
If you send an email to one of the mods, they might be able to help. The main page shows which of these guys are online and a contact link.
You are correct, we just need a conversation to know what you want to change it to and can even put in a proper section.
 

ecdez

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#19
Thanks! I actually had other tools that i planned to work on first but somehow this one got bumped in front. Never tore one down this far before so I hoping I can get it back together correctly. :D
 
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