Aug 19 2017
Hamilton Illinois bunn special ball 16s pocket watch case thread repair
Posted by in hamilton
UP FOR SALE IS A REPLACEMENT SET OF 2 BURNISHERS. CASE AND WRENCH IS NOT INCLUDED. ONE SET OF BURNISHERS ARE COARSE THREAD AND THE OTHER SET HAS A FINE THREAD. I decided to make the burnishing tool out of aircraft aluminum. The only wrench available that would open up large enough to fit an 18 size pocket watch case was built poorly. Therefore I took the wrench apart and rebuilt it to be rock solid. After doing a lot of research on the 12 size 16 size and 18 size I have discovered that all of the American pocket watch cases are cut on an SAE thread. SAE means The Society of Automotive Engineers. The threads are cut on a 60 degree pitch. After going through all of my cases, The wrench will come with 2 different size burnishers. In order to determine what size burnisher you need to be using you need to place the burnisher directly on the thread. The burnisher that fits perfectly will not allow any daylight to shine through…… You may need to use an eyeloop to see this. When using this tool it is important that you do NOT force anything into place. You need to gradually and slowly turn the handle in order to close up the threads. You do NOT want to use a tap because you do not want to remove any metal. With the tool I made you want to re-form the Threads. You want to maintain the structural integrity of the threads. When the tool is in use put some machinist oil on the threads. This will help with the application. The COARSE thread Will work on most of your 16 size pocket watch cases. The item “Hamilton Illinois bunn special ball 16s pocket watch case thread repair” is in sale since Sunday, November 20, 2016. This item is in the category “Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique”. The seller is “watchdiva” and is located in Myrtle Beach, South Carolina. This item can be shipped worldwide.
- Brand: Hamilton