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Suitable metal / enclosure for project

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Chris TickTock11/11/2019 15:52:57
229 forum posts
10 photos

Thanks for all the posts. Pedantically grinding is distinct from polishing but sometimes the term 'lapping' is used for both in the context of grinding or coarse polishing.

Is my motor powerful enough....probably....hopefully..... remember a DC motor gives more torque at its lowest speed (according to Sherline.

Air flow is an issue in as much as a poster correctly points out the sensible provision for vents.

Many thanks to all that posted

Chris

Michael Gilligan11/11/2019 20:00:26
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14264 forum posts
627 photos
Posted by Ian P on 11/11/2019 15:07:18:

Grinding and lapping are both material removal processes but they are distinctly different techniques as far as I know.

.

Ian,

I would be genuinely grateful if you could provide definitions which clarify the distinction, without any ambiguity or blurring

I am aware that ‘lapping’ generally involves having loose particles between two surfaces: BUT, as I mentioned earlier, there is the case of the ‘charged lap’ in which the particles are deliberately forced into the softer surface prior to use.

... Are you saying that [contrary to custom] this device should be classed as a grinder (or perhaps a hone) not a lap ?

MichaelG.

.

Just in time for an edit: I’ve found this https://www.grs.com/PDF/LIT-322_CastIron.pdf

Which at least confirms that I wasn’t making-it-up.

Edited By Michael Gilligan on 11/11/2019 20:26:02

Ian P11/11/2019 20:25:49
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2254 forum posts
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Whilst I can see the similarity between a charged lap and abrasive material bonded into a rigid substrate, I doubt anybody would consider the lap as a grinder. Equally I cannot see the wheels that ChrisTT has being used in the manner of a charged lap.
Ian P
This is what Google comes up with for the two processes.
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
Grinding is an abrasive machining process that uses a grinding wheel or grinder as the cutting tool. ... Grinding is used to finish workpieces that must show high surface quality and high accuracy of shape and dimension. It has some roughing applications in which grinding removes high volumes of metal very rapidly.
Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine. ... The other form of lapping involves a softer material such as pitch or a ceramic for the lap, which is "charged" with the abrasive.
Michael Gilligan11/11/2019 20:30:21
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14264 forum posts
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I don’t think we are getting any nearer to the clear distinction that you claimed, Ian

... Let’s just call it quits, my friend. yes

MichaelG.

Ian P11/11/2019 21:11:34
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2254 forum posts
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Happy with agreeing to disagree

Ian Psmile

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