To any concerned:
The diameter of both rods on my Manson gauge is .500".
The length of the rod that has the "ball" on the end - 18 1/2"overall. It is 16 1/2" from the "ball" to the block the rod goes into.
The length of the rod that hold the dial gauge is 16 1/4" from the center of the gauge stem to the block the rod goes into.
It is 18 1/4" from the center of the gauge stem overall.
I just got my Manson gauge yesterdayfrom Brownells. The Skeets bore gauge is backordered as they were out at the time. It should be here by early Feb. I should have bought these gauges 15 yrs ago when I started playing with these old doubles. I will never again say "I don't know BWT or bore size." For anyone who doesn't have a BWT or bore gauge, if you are going to keep buying old doubles,, it will pay to get one.
8bore - thank you for the clear explanation on how to use the Manson gauge horizontally. It is saved to my hardrive.
For anyone else interested, there was a hard "fiberglass" clamp that came with my Manson gauge. In the instructions, here is the explanation : "Alternatively, we now manufacture a reinforcing clamp-new design, pictured on page 1 - which may be pressed over the arms to assist with rigidity. Clamps are included with all new orders for Wall Thickness Gauges; If your WTG was ordered before we offered the clamps, please call us and we'll send you one for the price of postage."
thanks, redoftx
Last edited by RedofTx; 01/20/12 11:06 PM.