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Best way to chamfer a 45 degree edge

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sfsteel

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#1
I have a rectangular piece of steel that is 1x2x3. What is the best way to chamfer the sharp 90 degree edges to 45 degrees? I’m looking on amazon for “chamfered end mills”, and I get a bunch of woodworking router cutters and countersink bits (assuming for wood?).

I was thinking I could use a 45 degree cutter, and just kiss the edge to knock off the corner.

I supposed I could angle the head of my mill to achieve it, but that is kind of a pain.

What’s the standard procedure for this result?

Thanks!
 

T Bredehoft

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#2
Look for inserted chamfering tools. They come in all sorts of angles.
 

Bob Korves

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#3
If it is an option, just tilt the head to 45 degrees and cut the chamfer with an ordinary end mill. It is no big deal to tilt it, do the job, and tilt it back.
Edit: Use the side of the end mill for cutting.
 

mmcmdl

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#4
An easy way is to use a 45 degree countersink.
 

Bob Korves

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#5
A 90 degree (two 45's) countersink would work, or 82 or 100 degrees (who is measuring it?), I have done that. Not at good as the side of an end mill at 45 degrees to the work though.
 

mmcmdl

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#6
Spotting drills , fly cutter with a straight bit , a ground broken centerdrill , engraving tools , the list goes on . ;) I wouldn't go tilting my head for a chamfer .
 

mikey

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#7
Use a mill drill with a 90 degree point. Align it to cut the edge touching the fixed jaw and simply rotate the part to do all the edges.
 

Mark Needham

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#8
Google, "Single Angle Chamfer Mill". Various options to suit your wallet. I now have an 'insert' job. Use it all the time.
 

MalR

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#9
‘45 degree inverted dovetail cutter’ is another search term to use.

If it’s a quick 1-off job, grind the angle onto a fly cutter.


Sent from my iPhone using Tapatalk
 

sfsteel

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mmcmdl

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#11
That's the ticket ! :encourage:
 

Bob Korves

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#12
Without setting anything up on the mill at all, a nice shop made tool like this one will do the job quick, easy, and nice:
A more in depth video from Stefan:
 

BtoVin83

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#13
What kind of accuracy and repeat-ability are you looking for? I just usually take a fly cutter and grind a 45 degree tool bit and have at it. Couple of other ways, angle your vise or make a vee block for the stock to reside in.
 

ezduzit

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#14
BK--thanks for the links.
 

BaronJ

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#15
Hi Guys,

I'm sure that some of you have seen the picture of my Norman patent tool holder, and the nice rounded edges that it has.
Well I used a woodworking carbide router cutter ! I also use the V shaped ones for deburing and countersinking the edge of large holes.

16-09-2018-010.JPG 16-09-2018-014.JPG
 

Shootymacshootface

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#16
What kind of accuracy and repeat-ability are you looking for? I just usually take a fly cutter and grind a 45 degree tool bit and have at it. Couple of other ways, angle your vise or make a vee block for the stock to reside in.
This is the one.
 

Superburban

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#17
For quick projects, I use the 12" disk sander, and Vee blocks.
 

Mark Needham

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#18
Reckon you'll be happy with that.
 

hman

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#19
Searching ‘single angle inverted dovetail cutter’ and ‘single angle chamfer’ did the trick and filtered out all wood router bits. I ended up going with an indexable set as I could use them for some other stuff I need coming up. Thanks!

https://www.amazon.com/LITTLE-HOGGER-3PC-END-MILL/dp/B00J0GVVNU
Don't know if Shars' "blackfriday" code will work on eBay purchases. But you can get the same set for $47.70 (70¢ more), plus the discount (and probably comparable shipping) by going to:
https://www.shars.com/little-hogger-mill-set

I just bought the set, plus some extra inserts.
 

dave_r_1

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#20
...erased...was a POTD post, didn't belong here...
 
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