On Sat, 28 Nov 2009 22:47:07 -0500, Ned Simmons wrote:

With the outer spacer, it saves one bearing but adds the spacer. And the
whole thing, I'll bet, was developed experimentally.

The HLVH layout is extreme, but some space between the front bearing
pair is not unusual. I'm looking at a cross section of a 10EE
headstock and it appears the spacers are about 2-1/2" long. The
support at the tail is an unspaced pair of angular contact bearings.
Top speed of an EE is about 1000RPM higher than an HLVH.

3000 rpm for the HLV-H
4000 rpm for the DV-59 which uses a smaller spindle and headstock..but
only 2 bearings

Gunner



"Aren't cats Libertarian? They just want to be left alone.
I think our dog is a Democrat, as he is always looking for a handout"
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Heh, heh, I'm pretty sure my dog is a liberal - he has no balls.
Keyton