7x14 to 7x16 Rebuild

GrifterGuru said:
Purchased here >> Brushless Motor Kit (<< Link)

Sadly, larger dimensions than it was supposed to be and would not fit the motor pocket in the 7x bedway, so I am dropping down to an 1100W motor kit, when I can get around to ordering one.
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you thought you needed more than 1.5HP on a 7X lathe?
 
verbotenwhisky said:
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lol i should have known you would bring that guy up. it is important to keep in mind that he got rid of that lathe after doing every thing that he could think of to increase the rigidity, including filling the bed with epoxy granite, and failed. i do like his stuff but with the lengths that he went to to stiffen up that lathe I think I have a good idea of how far you can push that bed design. this is all IMO and my opinion is not important when it comes to other peoples toys, just curious about why anyone would think 2hp is needed, useful or even a good idea in a 7X?

Grifter you do you and i will enjoy watching from the sidelines lol. I'll even hold your beer!
 
dabear3428 said:
you thought you needed more than 1.5HP on a 7X lathe?
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An 1100W (or even the 800W on my 7x) brushless motor sounds like a lot, but.... At low RPM it's not that impressive. I also have a Logan 10" lathe powered with an ordinary (AC induction) 1750 RPM 1/2 HP AC motor. There is absolutely no comparison between low RPM from step-down pulleys and gears, and low RPM from an electronic controller.... just IMO, of course. If I could have fitted one of the larger brushless options on my 7x, I would have done it.
 
VicHobbyGuy said:
An 1100W (or even the 800W on my 7x) brushless motor sounds like a lot, but.... At low RPM it's not that impressive. I also have a Logan 10" lathe powered with an ordinary (AC induction) 1750 RPM 1/2 HP AC motor. There is absolutely no comparison between low RPM from step-down pulleys and gears, and low RPM from an electronic controller.... just IMO, of course. If I could have fitted one of the larger brushless options on my 7x, I would have done it.
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ok, I'm running 1100w brushless on my 9X24 and unless i do something stupid low speed tq is not an issue, i keep it in low setting but i can get 1600 rpm in low so no real reason yet to do the high speed setting, but this is a lot heaver lathe that the 7Xs. I guess a lot depends on how low you want to go but i do not have problems in steel at 200rpm.

my achilles heal is rigidity not power IMO.
 
dabear3428 said:
lol i should have known you would bring that guy up. it is important to keep in mind that he got rid of that lathe after doing every thing that he could think of to increase the rigidity, including filling the bed with epoxy granite, and failed. i do like his stuff but with the lengths that he went to to stiffen up that lathe I think I have a good idea of how far you can push that bed design. this is all IMO and my opinion is not important when it comes to other peoples toys, just curious about why anyone would think 2hp is needed, useful or even a good idea in a 7X?

Grifter you do you and i will enjoy watching from the sidelines lol. I'll even hold your beer!
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Just could not help it, I had to mess with you..... :grin: :grin: :grin: :grin:
 
dabear3428 said:
ok, I'm running 1100w brushless on my 9X24 and unless i do something stupid low speed tq is not an issue,
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Define 'something stupid' :)
How much mechanical speed reduction is there between the motor and the spindle on your 9x?
 
VicHobbyGuy said:
Define 'something stupid' :)
How much mechanical speed reduction is there between the motor and the spindle on your 9x?
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oooh good question, most of those 1100 BLDC motors top out at 4500 rpm and spindle tops out at 1600 in low so 4500/1600 == 2.8 :1 ?
as to the definition of something stupid, most anything i decide to do in my hobby life is suspect.
 
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