??? ??? Thanks , heres the google #'s in case you want to check
yer tach
??? ??? 48, 80, 96, 137, 165 and 276 r.p.m. in backgear and
244, 415, 502, 706, 844 and 1435 r.p.m. in direct drive. With V-belt
drive the speeds became approximately: 52, 72, 95, 112, 130,
150, 195 and 265 r.p.m. in backgear and 285, 370, 495, 570, 670,
1010 and 1365 in open gear.
??? ???
animal
On 4/11/2023 12:26 PM, Rogan Creswick
wrote:
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I don't know the spindle speed -- I have a tach,
but haven't measured & written down the speeds at each
setting -- as fas as it would go with my 1725rpm motor, but
there's a pulley exchange there that's likely specific to my
lathe.
For the crossfeed: I'm also not sure how the gearbox
translates to crossfeed speed.? I was using the 224tpi /
0.0015" per rev gearbox setting.? Does anyone know how that
translates to a radial velocity?
On Tue, Apr 11, 2023 at
10:57?AM mike allen <
animal@...>
wrote:
??? ??? What speed were you using ?
??? ??? animal
On 4/11/2023 9:00 AM, Rogan Creswick wrote:
Yeah, I was pretty worried about that
stick-out, but I only had three 3/16" endmills; two of
these, and one shorter 2-flute. I wanted the extra
flutes, given the speed limits on my lathe, but these
4-flute endmills?are fluted for a? *long* ways, and I
needed enough clean shank to indicate on.
I did break one of them in a test cut, feeding by
hand, though, so the power cross-feed really made this
possible.? I have a really hard time feeding that
slowly and steadily by hand.
Thanks for the great video and
picture!? I'm amazed you were able to do that slot
with that end mill hanging out that far. Nice. :-)
The other Jim B.
