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This is the Ring Grinder I've used for a very long time, a KD-870.
Just looked it up and get the feeling it isn't made anymore because they refer to it as 'Vintage', meaning you'd find one on eBay. Summit has an identical tool but KD is not listed as the mfr.
Mike T - Prescott AZ
Jim - when I looked around to see who offered the manual-type ring filers, I plugged in 'KD' and saw a listing from Summit but then it read...'Unavailable'.
Then noticed they sold an almost identical No-Name filer and I'll bet it works just as well as the old KD version.
Mike T - Prescott AZ
For a cheap hand crank ring filer, it's hard to beat Goodson's 250 model. They are about $100 and use a 120 grit disc. The disc will easily last and can be flipped. Replacement discs are less than $20. I'm sure Summit has a version comparable. Use the finest grit, always file inwards, file squarely, and dress with a hand file before final fitting.
This piece has served me well forever, but the electric Total Seal version is nicer, albeit about $800 nicer though!
for those of you that used one of these cheap grinders, did the disc last long enough to do all 16 rings?
I've had the same one shown above for so many years that I cannot when or where I got it. But I've done rings for many engines for many years with no noticeable wear. One of the cheapest and best tool investments I've ever made. Oh ya, it also came with an extra grinding disc which I've never needed.
When I was a young teenager I just used to use a fine hand file. Today I just gapped rings for a Subaru Sti and used a Dremel with a fine cutoff wheel which worked very well.
Last edited by Scott Marzahl; Dec 1, 2022 at 08:28 PM.
KD-870 Ring Filer
