Randy_
Member
There is a current IAP thread that asks for help finding a substitute size drill bit for a missing 7mm bit. After taking measurements on a couple of slimline tubes, there appeared to be several candidates that could be used. The largest was 0.014" oversize and the smallest 0.005" oversize. There is also a bit (H) that is 0.001" undersize and might be used with some gentle reaming.
I am aware of the fact that different types of glue require different joint gaps to develop their maximum strength; but I have no idea what the ideal gap sizes should be. I wonder if some of the problems that folks are having with blanks coming off their tubes is the result of less than optimum joint strength? Anyone out there know what the ideal joint gaps are for the CA, epoxy and poly glues that we use.
As I write this, I have a vague remembrance of an old post by someone.....an engineer, I think.....who was going to do some controlled tests on glue strength specifically as related to pen crafting. The post may have been made on the Yahoo Pen Group site?? I don't remember ever seeing the results of those tests. Anyone recall that post or what the results might have been??
I am aware of the fact that different types of glue require different joint gaps to develop their maximum strength; but I have no idea what the ideal gap sizes should be. I wonder if some of the problems that folks are having with blanks coming off their tubes is the result of less than optimum joint strength? Anyone out there know what the ideal joint gaps are for the CA, epoxy and poly glues that we use.
As I write this, I have a vague remembrance of an old post by someone.....an engineer, I think.....who was going to do some controlled tests on glue strength specifically as related to pen crafting. The post may have been made on the Yahoo Pen Group site?? I don't remember ever seeing the results of those tests. Anyone recall that post or what the results might have been??