Tag Archives: thread taps

Notes on making a section for a Bock size 5 nib housing

We frequently get requests for advice regarding the correct proceedure for making fountain pen sections for Bock nib housings, particularly regarding size 5 nibs, which appear to give more trouble than the size 6 ones.

  • Standard practice when establishing the correct drill size for thread taps is to subtract the pitch from the diameter. In the case of a Bock size 5 housing, that would work out as 6.4 – 0.6 = 5.8However, the very bottom of the housing has a tiny non-threaded area which has a diameter greater than the drill size.  Therefore we recommend that you use a 6mm drill, which will allow the housing to be inserted easily, without compromising the integrity of the section thread.
  • Ensure that the non-threaded part of your section is marginally longer than the non- threaded part of the housing. This will allow the housing to locate on the tiny rim under the nib, and not locate by running out of thread, which could cause it to seize up. 
  • Run your taps through the thread as far as possible, right to the end of the cutters, to open up the minor diameter of you section thread as much as possible. Once you have cut your thread, run a tap in as far as possible by hand from the opposite end, which will also serve to open the minor and to clear any swarf or other detritus.

www.beaufortink.co.uk/bocksize5.html
Bock size 5 housing. See our website for full drawing

Bock size 5 housing. See our website for full drawing

 

New photos for our Bock nib thread taps

We’re pleased to say we’ve finally made time to photograph the actual thread taps which suit our Bock nib housings. So instead of a representative picture on our website, now what you see is what you get.

www.beaufortink.co.uk/taps.html

Thread taps to suit Bock nib housings

Thread taps to suit Bock nib housings, available for Bock sizes 5 and 6

Custom pen thread taps for Bock nibs

Taps to suit Bock nib housings in both size 5 and 6 are on the way, and available to pre-order right now on the website.

Any tap (or taps) will get a pre-prder 10% discount, and if you buy a complete set of three in either size, you’ll get a pre-order discount of over 17.5%

No voucher codes required – just a special pre-order deal which will run for the early birds until they arrive here, which will be soon we hope.

http://www.beaufortink.co.uk/taps

Thread taps for Bock nibs from Beaufort Ink

Thread taps for Bock nibs from Beaufort Ink