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Author: Subject: Small Surface Grinding Tips Please
scootz

posted on 27/1/18 at 10:16 AM Reply With Quote
Small Surface Grinding Tips Please

Mornin

Does anyone have any hints our tips for getting these two lugs surfaces acceptably flat?

I have a pillar-drill... is anyone aware of there being any drill-bits that machine a flat surface?

Its only for mounting a bracket to take a handbrake spot-caliper, so perfection is not an issue. TBH, my flap-disc grinds are probably perfectly ok for the purpose, but you know how it goes...










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40inches

posted on 27/1/18 at 10:22 AM Reply With Quote
I have used my pillar drill as a milling machine, using an end mill cutter and taking small cuts at a time.
Something like this eBay Item

[Edited on 27-1-18 by 40inches]

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scootz

posted on 27/1/18 at 10:33 AM Reply With Quote
Cheers - was just looking at those.





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rusty nuts

posted on 27/1/18 at 12:11 PM Reply With Quote
How about using a flat surface ideally a surface plate and a sheet of emery paper to check the surface before any drastic machining?
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mark chandler

posted on 27/1/18 at 12:14 PM Reply With Quote
If your pillar drill has a taper fit chuck forget it, the sideways force will knock it loose and the mill will drop into your work chewing it up, the mill will also quickly become loose within the chuck having the same affect, this is why milling machines use collets and drawbars.

You would be better fixing some corse paper to a flat surface ideally glass and rubbing it across this.

From expensive experience, drills are good for drilling mot milling

[Edited on 27/1/18 by mark chandler]

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40inches

posted on 27/1/18 at 12:30 PM Reply With Quote
quote:
Originally posted by mark chandler
If your pillar drill has a taper fit chuck forget it, the sideways force will knock it loose and the mill will drop into your work chewing it up, the mill will also quickly become loose within the chuck having the same affect, this is why milling machines use collets and drawbars.

You would be better fixing some corse paper to a flat surface ideally glass and rubbing it across this.

From expensive experience, drills are good for drilling mot milling

[Edited on 27/1/18 by mark chandler]


In theory, yes But I have done a bit of milling on my cheapo Lidl bench drill, with a 1/2" chuck, removing a half mill at a time.
The best way is to cut vertically up to a stop, move the work piece along about 5mm, rinse and repeat A bit like engine turning.
It will need lots of lubricant.

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scootz

posted on 27/1/18 at 01:20 PM Reply With Quote
Thanks guys... I guess the sanding approach is probably the safest as its not that far away from flat





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ReMan

posted on 27/1/18 at 02:44 PM Reply With Quote
Alternatively some careful filing with a big file would have them flat and parallel





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scootz

posted on 27/1/18 at 05:20 PM Reply With Quote
quote:
Originally posted by ReMan
Alternatively some careful filing with a big file would have them flat and parallel


Yup - that would do it! Cheers





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fazerruss

posted on 27/1/18 at 06:52 PM Reply With Quote
Or take it to someone with a milling machine. I could do it but im probably miles away.

[Edited on 27/1/18 by fazerruss]





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scootz

posted on 16/2/18 at 10:13 PM Reply With Quote
Just to complete the story - bit the bullet and took it to my local machine shop. Cost a tenner, but its perfect. Now all powder coated!

Thanks for the replies.







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40inches

posted on 16/2/18 at 11:11 PM Reply With Quote
Brilliant
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Angel Acevedo

posted on 17/2/18 at 12:43 AM Reply With Quote
quote:
Originally posted by scootz
.. Cost a tenner, but its perfect. ...
Thanks for the replies.




Locost solution for an expensive problem awaiting to happen..
Well done!





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02GF74

posted on 20/2/18 at 09:01 PM Reply With Quote
quote:
Originally posted by 40inches
quote:
Originally posted by mark chandler
If your pillar drill has a taper fit chuck forget it, the sideways force will knock it loose and the mill will drop into your work chewing it up, the mill will also quickly become loose within the chuck having the same affect, this is why milling machines use collets and drawbars.

You would be better fixing some corse paper to a flat surface ideally glass and rubbing it across this.

From expensive experience, drills are good for drilling mot milling

[Edited on 27/1/18 by mark chandler]


In theory, yes But I have done a bit of milling on my cheapo Lidl bench drill, with a 1/2" chuck, removing a half mill at a time.
The best way is to cut vertically up to a stop, move the work piece along about 5mm, rinse and repeat A bit like engine turning.
It will need lots of lubricant.


If it is critical piece, then don't - I've done the same and had the chuck come out and chew the aluminium piece.






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