#5 Bock nibs and feeds

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babyblues

babyblues

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I have a couple #5 Bock nibs with feeds and holders. After fabricating the part these thread into, I discovered that the piston converter I had from a Jr. Gent didn't fit into the feed. It was way too loose and just fell out. Is there a specific converter that does fit these feeds?
 
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duncsuss

duncsuss

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Hmmm ... your use of the word "into" is confusing me a little.

Typically the hole in the middle of a cartridge/converter fits ONTO a spigot that pokes out the back of the housing.

Can you post a photo of the pieces (nib, feed, housing) that you're using?
 
darrin1200

darrin1200

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I only did two sections for the bock, but I also found it did not fit tight on the feed. I found that I had to size the rear hole of the section to fit, and snugly hole the converter. It was also dependent on the converter you used. I fit mine for the Schmidt K5, but then it was to loose for the inexpensive kit converters.
 
J

jj9ball

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In my experience you always have to size your hole according to the converter pump you are using. They all seem to be slightly different in size and you want a good friction fit. If you want to avoid all the mess use a k6 converter that is threaded. It takes the guess work out of fitting the converter. I hope this helps. If you want to figure out how big of a hole to make use a calipers to find the EXACT size of the converter. This is where it helps to get down to within a thousandth or two. From here I individually measure my drill bits with the caliper. I pick the closest size that is too small. Drill on scrap first to test. If it doesn't fit go one size bigger. This is where it helps to have a full set of metric and lettered bits. Each step will only be 10 or 15 thousanths. Just remember if a bit measures .367 it will probably drill a .375 hole. There will always be runout to be aware of. I hope this helps.
 
duncsuss

duncsuss

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jj9ball said:
If you want to avoid all the mess use a k6 converter that is threaded. It takes the guess work out of fitting the converter.
Click to expand...

Jeff, I've been meaning to ask you for a while -- what tap is needed to cut threads for the K6 converters? (And if it's non-standard, do you know of a source for them?)

Thanks!
 
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