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Harold Hall

Metalworking

Workshop Set Ups

Sharpening Milling Cutters, Setups .   Harold Hall    

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All pictures can be clicked on to provide a larger view

Sharpening milling cutters is a vary varied task, the page showing but a few.

 

Photo 1 shows the end cutting edge of an end mill being sharpened  with Photo 2 grinding the secondary clearance. The square block holding the cutter is used to index it for the four edges.

 

Photo 3 shows the same process but using an end mill sharpening fixture. In Photo 4 the fixture is being used for its main purpose being to sharpen the side cutting edges.

 

The end mill fixture is again being used this time to sharpen a dovetail cutter Photo 5. However, as a dovetail cutter has no helix it only indexes the cutter for the six edges. Photo 6 shows a method using just a hexagonal block to index the dovetail cutter  

 

Photo 7 shows a slitting saw being sharpened with care in the setup even very fine tooth saws can be sharpened.  

 

The Escape wheel cutter in the next few photographs is not a cutter shape that many will have to grind but have included it here to illustrate the capabilities of the grinding rest.

 

The drawing in Photo 8 shows what is required but you will have to look at the larger view to read the drawing. This shows that there are four faces to be ground, which I will call top, front, rear and end, with three angled in two directions.

 

Photo 9 shows the top being ground and Photo 10 the result.. The front face is being ground in Photo 11 and with the result I Photo 12.

 

Photo 13 shows the end face and Photo 14 the rear face being ground with Photo 15 the final result. I would have been very unsure if I could have made a working cutter free hand, almost certainly no.

 

Photo 16 shows the end edges being sharpened using  a much simpler fixture than the rest show in the other photographs.

 

It is worth noting that only sharpening the end cutting edges of an end mill can produce an appreciable improvement in its performance.and is worth doing even if you have no facilities for sharpening the side cutter edges.

 

As yet I have not produced any pages that fully explain the grinding of the Escape wheel cutter but for the remainder it would be beneficial to view my more detailed pages to fully understand what I am attempting.

 

Sharpening workshop cutters, LINK

Advanced rest LINK

End mill sharpening fixture photo 16. LINK

 

The setups shown are using my advanced grinding rest for the tasks being undertaken. However, my basic grinding rest works very similarly and will, with just a little extra care, produce equally good results using the same methods

 

Sharpening milling tools, end mill
Sharpening milling tools, end mill
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 2

Sharpening milling tools, end mill
Sharpening milling tools, end mill
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Sharpening milling tools, dovetail cutter
Sharpening milling tools, dovetail cutter
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 5

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 6

Sharpening milling tools, clock escape wheel cutter
Sharpening milling tools, slitting saw
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 7

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Sharpening milling tools, clock escape wheel cutter
Sharpening milling tools, clock escape wheel cutter
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10

Sharpening milling tools, clock escape wheel cutter
Sharpening milling tools, clock escape wheel cutter
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Sharpening milling tools, clock escape wheel cutter
Sharpening milling tools, clock escape wheel cutter
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Sharpening milling tools, end mill
Sharpening milling tools, clock escape wheel cutter
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