my first build

[irving2008]

Hi Wires

The root diameter is 7.69mm have a look at; http://www.nookindustries.com/acme/A...Info.cfm?id=15

Regards.

Ivan

As an alternative to turning the screw down you could look at these components from dumpterCNC

Note when specifying TR12X3 make sure you say whether its single or 2 start thread - the common one is single start. 2-start is faster (6mm lead) but the components etc are more expensive.

As to the Root Dia, DIN103 spec say max 8.5mm, min 7.68mm depending on fit and load spec. In my experience, generally expect it to be around 7.95mm making it a good fit on 8mm ID bearings.


jonm - I must type faster - Roy's site is a good place to bookmark...