My old Rohn catalog with drawings of all the various Rohn 25 and 45 top
sections has disappeared. I thought I could get the dimensions off the flat
plate top section, since those holes are for the TB-3.
I just measured mounting hole spacing on a mounted TB-3 as 3-13/16 inches on a
side. The hole pattern is a perfect square, since there are four bolt holes.
Of course, your center hole should be greater than, say, 2-1/2 inches.
If no one else responds and you still need to know the diameter of the four
mounting holes, let me know. It's a bit more work (I have to flip my spare
2-foot top section upside down to measure the bolts themselves.
Bud, W2RU
On Dec 20, 2012, at 11:11 AM, Jerry Gardner <jerryw6uv@gmail.com> wrote:
> Anyone have a drawing of the hole pattern needed for the Rohn TB3 thrust
> bearing they could send me (or point me to)? You'd think this would be on
> the Rohn web site, but darned if I can find it.
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