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Valve seat cutter

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John Rudd:
I need to make a valve seat cutter but have come across a slight problem.......... :doh:

My original intent was to make the cutter from Silver Steel, profiled and hardened to suit...

I started making a mock up from some EN1a 1" diameter bar but found it was a tad too small...The SS needs to be ideally in the region of 1-1/4" but I cant source any.......

Back to drawing board.... :dremel:

EN1a is in plentiful supply but I'm not sure it can be hardened to perform as a cutter..

So, what else can I use along with the EN1a bar to make a cutter?  was thinking along the lines of some sort of carbide insert...but not sure how to go about this....?

Just to add the diameter of the valves are around the 7/8" mark...if this helps? and its for a small Villiers engine I'm renovating...

philf:
John,

Silver Steel is equivalent to O1 tool steel or gauge plate. O1 is readily obtainable in most sizes.

EN1A can be case hardened but isn't suitable for a cutting tool.

Cheers.

Phil.

Bluechip:

--- Quote from: John Rudd on February 25, 2013, 03:35:37 PM ---
The SS needs to be ideally in the region of 1-1/4" but I cant source any.......


--- End quote ---

13" lengths are here. Download the supplies catalogue link.
 
Page 9.
 
http://www.livesteammodels.co.uk/suppliescat.html
 
Better to sit down first though ....£30 +vat ish .... not what you might call 'freeware'  :(
 
Dave BC

sbwhart:
If you're cutting the seat in something soft like ally or brass you will get away with case hardening.

Stew

awemawson:
Make a suitable EN1A cutter, but cut a pocket in it for an indexable insert

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