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...
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]
Cheers - was just looking at those.
How about using a flat surface ideally a surface plate and a sheet of emery paper to check the surface before any drastic machining?
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]
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]
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. 
A bit like engine turning. Thanks guys... I guess the sanding approach is probably the safest as its not that far away from flat
Alternatively some careful filing with a big file would have them flat and parallel
quote:
Originally posted by ReMan
Alternatively some careful filing with a big file would have them flat and parallel
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]
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.
Brilliant 
quote:
Originally posted by scootz
.. Cost a tenner, but its perfect. ...
Thanks for the replies.
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
The best way is to cut vertically up to a stop, move the work piece along about 5mm, rinse and repeat
It will need lots of lubricant.