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Thread: Fitting a single phase motor
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6th Feb 2022, 09:34 PM #1New Member
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- Jul 2021
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Fitting a single phase motor
Hi guys, this is my first post on the forum. I am putting one of the techtop single phase motors onto my 260, but have discovered that the drive frame casting prevents it from fitting into place. I've seen some mentions on other threads about modifying the casting to take a larger motor but am nervous to go for it without getting some advice first. Can anyone please tell me whether cutting into the casting to create space for the motor is a good or bad idea? The photo is to show what I would be cutting away, in case I haven't done a very good job of explaining. Any help will be appreciated. Thanks
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6th Feb 2022, 09:55 PM #2Senior Member
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- Aug 2015
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- Adelaide
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Hi Craig
You can cut away at the frame safely without any issues, you can cut it with a jigsaw, for some reason the there was 2 different castings with the different size cutouts and that seemed to be on C model lathes.
Regards Steve
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7th Feb 2022, 10:33 PM #3New Member
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- Jul 2021
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- Toowoomba
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Hi Steve, thanks for the reply. Just wanted to make sure I didn't do something stupid and irreversible. I'll probably end up doing it by hand with a hacksaw as I don't have good blades for the jigsaw.
Thanks
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10th Feb 2022, 08:28 AM #4australian metalworking hobbyist
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- Jan 2009
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- Holbrook, NSW
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motor fitting
Hi Craig,
Cutting out the casting to fit the standard motors, available today, is something that just has to be done. The Asea motors, that Hercus fitted in some of their later machines, had a much lower profile. Most of the cheaper standardised types sold today are considerably larger. Even with the Asea motors, they still come with larger bodies as the horse power increased. Although some castings have a big enough opening, generally If you add a 3/4 hp to a machine that previously a 1/2 hp or an Asea motor, some modification will be necessary. This won't affect the function of the machine at all.
Mal
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10th Feb 2022, 08:54 AM #5Mechanical Butcher
- Join Date
- Oct 2004
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- Southern Highlands NSW
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- 1,894
Single phase motors are often more "lumpy" than 3 phase, because as well as a terminal box they have a capacitor or two that are attached to the motor body.
The size and location varies between makers. I had to check various motors before finding a Teco that would fit my 260.
The cap housing was not obstructed, but I did have to lower the terminal box a bit.
I had the electrician retain the contactor switch and no-volt release safety feature.
He installed a 240V part into the contactor so that would work.
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11th Jun 2022, 10:11 PM #6Mechanical Butcher
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- Oct 2004
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- Southern Highlands NSW
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- 1,894
This motor has been fitted to a Hercus 260 with no modification.
The bulky terminal block and capacitor are on the opposite side from the foot mounts, and didn't obstruct anything.
https://www.ebay.com.au/p/4034409367
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12th Jun 2022, 12:08 AM #7Golden Member
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- Dec 2011
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- Sydney
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- 505
Motors like that have bolt-on feet that can be fitted on any of the three 'sides' of the motor other than where the capacitor housing is located. It's very helpful in some situations.
Bill
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14th Jun 2022, 11:26 AM #8
Motor casting modification
Motor conversion.jpg
Here is a Hercus 260 modification to accept a single phase motor I did recently.Tools are good, more tools are better!
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