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 Post subject: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Jun Tue 12, 2012 2:08 am 
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Is there any way I can obtain another on/off switch for a Sears Dunlap 107.25830 drill motor? It has a 450 RPM 1/2 HP 3A motor. Thanks.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Jun Tue 12, 2012 2:15 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 21365
Location: Detroit, MI USA
Sears source 107 for portable power tools was Millers Falls, a relatively well known and quality tool manufacturer. With the Dunlap brand name, Sears likely sold that drill motor in the 1950's if not earlier.

I would try asking a company that specializes in parts/service for power tools like McNichols Electric in the Detroit area if by chance they still have anything that old in their inventory. I have been pleasantly surprised on numerous occasions by what is "universal" fit on power tool parts. Every big city used to have a few repair shops that specialized in power tools, and some of them are still in business decades later.

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Jun Tue 12, 2012 2:28 am 
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Thanks for the handy information Dennis. I'll try contacting McNichol's Electric.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Jun Tue 12, 2012 2:49 am 
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Location: Detroit, MI USA
It would be a good idea to open up the drill motor and see if there is a manufacturer's name or part number on the switch itself. You can be pretty sure it was sourced from an outside vendor like Cutler Hammer since it would be unlikely for Millers Falls to have made their own switches.

Once you know that information, it is easier for whoever you contact to determine if they might have something that can be made to work.

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Jun Tue 12, 2012 2:59 am 
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Thanks Dennis. It's my father's drill motor which is at his house, and he purchased the drill motor sometime around 1952 (no later than 1952). I'll phone him tomorrow, and have him search for information on the switch. Thanks!


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Mon 04, 2013 9:15 pm 
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Location: Middle Tennessee
Did you have any luck finding a replacement switch? I have the exact same drill and I need a switch and it appears to be an Arrow H&H. Any assistance would be appriciated.

Don Coatney

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 5:38 pm 
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Don, the only luck that we had was in purchasing another used Sears Dunlap 107.25830 drill motor on eBay. A new replacement switch for that drill motor just is not available. Just do a general search on eBay for "Sears Dunlap" as a new auction for that particular drill motor appears on that site about every 3-4 weeks or so. I was thinking of bidding for another one myself on eBay, but I'll skip the next auction if you intend to bid for one at the next offering.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 6:26 pm 
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Thanks for the reply. I checked epay yesterday before I made this posting and found one but it was a slightly different model. I will continue looking to see if one pops up. I really hate to toss this drill motor as it is much more powerful than any 1/2" drill sold today. When I disassembled it yesterday all the internals looked good and the carbon brushes have a lot of material on them. I lubed everything up and jumpered the switch for a test run and it runs like new.

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 10:06 pm 
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Yes Don. Those are excellent drill motors. Since you have an interest on acquiring one on eBay, I will skip that particular auction.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 10:22 pm 
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Joined: Feb Sun 17, 2008 11:36 pm
Posts: 1575
Location: Dayton, Ohio
You might want to check the, or add a, third wire ground for this drill, with its metal housing, if it don't have one, since, the insulation on a 60 year old drill motor might have some leakage.

I once was on a burial detail for a retired dentist. He had been working on his boat and he electrocuted himself entirely with his drill. (I heard he had been standing in water, at the time).

Charlie


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 10:52 pm 
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Yes, it's highly recommended that you use a grounded cord with this particular drill motor. When reinstalling the pistol grip, it might be easier to snag the trigger lock with a somewhat stiff monofilament wire, and then lead it into the grip.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: Feb Tue 05, 2013 11:45 pm 
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tinwhisker wrote:
You might want to check the, or add a, third wire ground for this drill, with its metal housing,
Charlie


I agree with the ground wire. I replaced the cord on this drill about 25 or so years ago. At that time I did add a ground wire as seen in this picture.

Image

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: May Mon 27, 2013 3:50 pm 
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Don: Did you happen to find another Sears Dunlap 25830 drill motor? If so, let me know. Thanks.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: May Mon 27, 2013 8:48 pm 
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Blustar1 wrote:
Don: Did you happen to find another Sears Dunlap 25830 drill motor? If so, let me know. Thanks.



I did not find another. I was able to repair my switch to working order.

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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: May Mon 27, 2013 9:52 pm 
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http://www.ebay.com/itm/Dunlap-drill-mo ... 2686wt_884

Here's one on eBay right now, but it doesn't come with the original chuck key. Moreover, I'm not too clear as to whether the switch is working, but the seller claims that it is. Here was his response to my recent question:

"Hello.........yes, I will send a chuck key with it. It is not the original, but it is for a 1/2' drill. In researching this drill I found some posts in forums that mentioned that the trigger switch spring did not work, but this unit works very well."

I was somewhat interested in bidding for the drill, but I thought that I would check to see if you had acquired one yet. If you're interested, you might further inquire as to the functionability of the switch. Be aware that this drill motor has been well used.


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 Post subject: Re: Sears Dunlap 107.25830 Drill Motor On/Off Switch
PostPosted: May Mon 27, 2013 11:18 pm 
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At this time I do not have an interest in the ebay drill motor. But thanks for the heads up.

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