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Ludwig-Hunger valve seat cutter

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Mick Bailey14/10/2021 13:15:45
25 forum posts

For anyone who isn't familiar with this type of cutter it uses a tungsten-carbide single point tool that machines out the seat at the appropriate angle. It behaves like a lathe tool - in reality creating a spiral cut. It's remarkably versatile in that DIY cutters can easily be made. Last year I rebuilt a Honda CB450 head and made up the required tool by brazing a tip to a piece of tool steel.

Unlike most cutters that only use a pilot to loctate a cutter head in the valve guide, this uses an additional outboard support clamped to the head for rigidity and precision. Any number of seat angles can be cut - I used a 3-angle cut on the Honda.

The question I have is that I would like a PDF copy of the original instruction manual that came with the set. Mine is missing and I know there are many setups illustrated for different applications. It's perhaps an early 60s Mk1 set in a wooden case.

steamdave14/10/2021 15:36:25
510 forum posts
44 photos

I had never heard of a Ludwig Hunger valve seat cutter before, so did a quick search and I found out the company is still in business.

Maybe worth contacting them.

The Emerald Isle

Mick Bailey14/10/2021 16:58:42
25 forum posts

Thanks Dave. I contacted them a while back and they sent me a link to the latest version, which I already had. This doesn't have the contemporary vehicle specific instructions - mainly for aircooled VW and other applications. Also, there are different accessories and fixtures that are no longer shown in the newer instructions (mainly because its all obsolete).

I also posted on the Samba forum and had a reply from an owner who had an original manual and he said he'd scan and email it but never did. His account is no longer active. I can use the cutter set without issue, but would like to get the manual to go with it anyhow.

Oily Rag14/10/2021 21:53:35
540 forum posts
184 photos


I have the remnants of a 'partial' set of Hunger seat cutting tools and there may be an instruction manual buried in the box with those remnants. I had it a long time ago and used it regularly, then someone borrowed it and when it came back I foolishly didn't check the contents! It went with a Hunger valve lathe that was a beautiful little thing, single point valve seat cutting at any angle desired.

I'll dig it out the shed and look as soon as I get the chance.


Mick Bailey15/10/2021 09:31:38
25 forum posts

That would be great. I'd also be interested in the remnants if you wanted to sell what you have as my own set is incomplete.

Oily Rag15/10/2021 12:01:32
540 forum posts
184 photos


I'll dig it out and PM you as to what is there.


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