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Anvil Rework
Posted: Fri Jul 17, 2015 9:07 am
by Brian
I dropped my anvil off at the machinist for cleaning, they will remove all of the many years of crud. However since I worked for the machinist for many years he will outright refuse to do anything he knows I can do. He recommended me a cutter and told me to buy online. So in a week or two after the anvil returns I will put this to use;
Anvil Rework
Posted: Fri Jul 17, 2015 9:54 am
by Chris Hall
ooh! Shiny metal!
What's cutter called? What's the taper? Where did you get it from?
Re: Diving into Kanna
Posted: Fri Jul 17, 2015 11:14 am
by Brian
This is a carbide insert face mill. The shank is an R8 taper threaded for a 7/16 draw bar. I decided to go with round cutters rather than the other shapes as they're the best suited (that I'm aware of) for harder materials like steel. I bought it on ebay and it came straight from Hong Kong.
One the anvil is surfaced I plan to build an insert for the hardy hole out of aluminum for tapping out.
Re: Diving into Kanna
Posted: Wed Jul 22, 2015 6:19 pm
by Brian
Taking .010" per pass at 85 rpms.
I ran out before taking final pictures but it's all cleaned up. My father wants to work on it a bit and put a good paint job. Works for me
Last pass was .002"
Runout on this bit in this machine is .001". I suspect a good portion of that is in the taper.
Anvil Rework
Posted: Wed Jul 22, 2015 10:42 pm
by Chris Pyle
Brian wrote:Taking .010" per pass at 85 rpms.
I ran out before taking final pictures but it's all cleaned up. My father wants to work on it a bit and put a good paint job. Works for me
Last pass was .002"
Runout on this bit in this machine is .001". I suspect a good portion of that is in the taper.
Nice work Brian. People charge a fairly hefty sum for anvils around here. Excited to see how this one comes out.
Re: Diving into Kanna
Posted: Thu Jul 23, 2015 8:13 am
by Brian
Indeed, I've seen $2-$3 per pound for a really nice one. This one is a great anvil, but had been wailed on by highschoolers for about 50 years, badly swayback and with a nice concavity in the center and chipped up edges....all but one bit of damage has been removed.
I've been debating wether I will fully polish the surface, it might be helpful for certain fine work.
Re: Anvil Rework
Posted: Fri Jul 24, 2015 7:55 am
by Chris Hall
What do you think of the surface quality from the new cutter?
Re: Anvil Rework
Posted: Fri Jul 24, 2015 9:24 am
by Brian
Compared to pointed cutters I like the round. It cut without galling and left a textured finish that looks like it could be easily taken to the next degree of finish.
Once I get it home I'll take a close up photo of the result before I put any additional work into it. Funny enough I thought I was really running this bit to the extreme end and I've come to find out there is a lot more to go in terms of cutting speed. So next time I run it I plan to bump the cutting speed up and possibly the feed rate.
Re: Anvil Rework
Posted: Wed Jul 29, 2015 11:46 pm
by Brian
Re: Anvil Rework
Posted: Fri Jul 31, 2015 8:12 am
by Brian
Onto the polishing stage of the face....oh what fun. I'll post a picture once I've made some worthwhile progress.