Mini Lathe Dividing Attachment
Here are some pictures of the dividing attachment I built for my Mini lathe. This is also my first attempt at using Google Drive. ?I think I posted a like to an entire folder of four pictures.
Dick
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Re: Reversing gear problem
Tons of thanks!? I have no access to the lathe. Sick, bored and entertaining useless musings... but it helps.
On Sat, Aug 5, 2017 at 3:10 PM, WAM ajawam2@... [7x12minilathe] <7x12minilathe@...> wrote:
?
Better links - silly Windows:
On 8/5/2017 4:09 PM, WAM wrote:
> This is from Drew's 3D model of the HF:
>
> you may have to right-click Save As on the dwg file
>
> Not sure how accurate it is, but from what I've seen in the 3D model,
> it's pretty damn close...
>
> On 8/5/2017 1:41 PM, mario.mohl@... [7x12minilathe] wrote:
>> Talk about gears, anyone happen to know the between centers distance
>> from spindle to aux shaft?
>
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Re: Reversing gear problem
Better links - silly Windows:
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On 8/5/2017 4:09 PM, WAM wrote: This is from Drew's 3D model of the HF:
you may have to right-click Save As on the dwg file
Not sure how accurate it is, but from what I've seen in the 3D model, it's pretty damn close...
On 8/5/2017 1:41 PM, mario.mohl@... [7x12minilathe] wrote:
Talk about gears, anyone happen to know the between centers distance from spindle to aux shaft?
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Re: Reversing gear problem
This is from Drew's 3D model of the HF:
;lathe-spindle.pdf
;lathe-spindle.DWG
you may have to right-click Save As on the dwg file
Not sure how accurate it is, but from what I've seen in the 3D model, it's pretty damn close...
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On 8/5/2017 1:41 PM, mario.mohl@... [7x12minilathe] wrote: Talk about gears, anyone happen to know the between centers distance from spindle to aux shaft?
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Re: Reversing gear problem
On a "7x12", it's 14". ?The "12" is measured from the chuck face. ?All the Chinese minis except the "7x10" are so measured, AFIK.?
The Ten is center-to-center. ?At least, mine is.
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-----Original Message-----
From: mario.mohl@... [7x12minilathe] <7x12minilathe@...>
To: 7x12minilathe <7x12minilathe@...>
Sent: Sat, Aug 5, 2017 1:41 pm
Subject: [7x12minilathe] Re: Reversing gear problem
Talk about gears, anyone happen to know the between centers distance from spindle to aux shaft?
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Re: Reversing gear problem
Talk about gears, anyone happen to know the between centers distance from spindle to aux shaft?
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Re: Reversing gear problem
Good news.
The old dried grease was softened by spraying WD40 into the joint on both sides of the pot metal casting so i could pull out the shaft and gear. On inspection i found the previous owner had never cleaned the shipping grease out of that joint but had tried to dab some lithium grease in the general direction of the bearing but to no effect.
I failed to disassemble the parts in the 6 years i have owned this 7x10 harbor freight lathe so am guilty of neglect.
Once cleaned and reassembled with wheel bearing grease the mechanism now works smoothly so back to making chips fly.
Thanks for all your help and advise
Pete McLaughlin
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Re: Reversing gear problem
Not true. ?The part about throwing almost anything into the mix.
There are official published formulas for denaturing ethyl alcohol. ?Each is intended to make the stew undrinkable (and difficult to purify), yet still suitable for use in different applications.
Gene McGough ?
From: 7x12minilathe@... <7x12minilathe@...> on behalf of Jerry Durand jerry_durand_california@... [7x12minilathe]
<7x12minilathe@...>
Sent: Thursday, August 3, 2017 10:48 AM
?
?
Be aware that denatured alcohol is drinking alcohol (ethanol) mixed with "something" to make it denatured (undrinkable).? For the "something" I've seen gasoline, wood alcohol, and other people have reported a wide range of things.? Essentially whatever the
manufacturer has a lot of that's cheap.
. . .?
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886
@DurandInterstel
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www.interstellar.com
Electronic design services, lighting controllers, PCB/PWB design and layout, custom electronic equipment.
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Re: Reversing gear problem
Did I mention "precaution handling"?? I said it
may work differently, might just mean today's batch corrodes metal
or removes a finish that yesterday's batch didn't.
As it's already flammable I doubt they'd make it more flammable.?
But in precautions you might get a batch that irritates skin or
your breathing when it didn't in the past.
Unlike WD-40 with it's tightly controlled formula this stuff
varies around.? That's all.?
On 08/03/2017 10:54 AM, Warren LeMay
notebook@... [7x12minilathe] wrote:
Yes, but it works great for drilling blind holes!!? and they
burn it in cars, even in California......
We deal with many things that need precaution handling (use
outdoors, don't drink it, don't swallow fish hooks) and this,
cutting oil and WD-40 are all on that list.
I just refuse to build a signature file that says wear eye
protection, don't wear a tie, roll your long sleeves up and
don't lick electrical sockets.? It is the responsibility of the
purchaser to know and understand the hazards of the tools and
products he buys.? The directions are on the can.....
I would expect the warning had some immediately dangerous
solution from a source that may not offer a warning, but the
Danger Flammable and Danger Poison on the can (and the
accompanying instructions for use) should prove adequate in this
case.
Warren L
--
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886
@DurandInterstel
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Re: Reversing gear problem
Yes, but it works great for drilling blind holes!!? and they burn
it in cars, even in California......
We deal with many things that need precaution handling (use
outdoors, don't drink it, don't swallow fish hooks) and this,
cutting oil and WD-40 are all on that list.
I just refuse to build a signature file that says wear eye
protection, don't wear a tie, roll your long sleeves up and don't
lick electrical sockets.? It is the responsibility of the
purchaser to know and understand the hazards of the tools and
products he buys.? The directions are on the can.....
I would expect the warning had some immediately dangerous
solution from a source that may not offer a warning, but the
Danger Flammable and Danger Poison on the can (and the
accompanying instructions for use) should prove adequate in this
case.
Warren L
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?
Be aware that denatured alcohol is drinking alcohol
(ethanol) mixed with "something" to make it denatured
(undrinkable).? For the "something" I've seen gasoline,
wood alcohol, and other people have reported a wide range
of things.? Essentially whatever the manufacturer has a
lot of that's cheap.
So you might find one batch/brand works differently than
another batch/brand.
On 08/03/2017 09:18 AM, Warren
LeMay notebook@...
[7x12minilathe] wrote:
Many shellacs and varnishes use denatured alcohol as a
carrier and that will also soften them later for removal.?
It's thin, cheap and available in the paint aisle at the
store.
--
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886
@DurandInterstel
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Re: Reversing gear problem
Be aware that denatured alcohol is drinking alcohol (ethanol) mixed
with "something" to make it denatured (undrinkable).? For the
"something" I've seen gasoline, wood alcohol, and other people have
reported a wide range of things.? Essentially whatever the
manufacturer has a lot of that's cheap.
So you might find one batch/brand works differently than another
batch/brand.
On 08/03/2017 09:18 AM, Warren LeMay
notebook@... [7x12minilathe] wrote:
Many shellacs and varnishes
use denatured alcohol as a carrier and that will also soften them
later for removal.? It's thin, cheap and available in the paint
aisle at the store.
--
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886
@DurandInterstel
|
Re: Reversing gear problem
Many shellacs and varnishes use denatured alcohol as a carrier and
that will also soften them later for removal.? It's thin, cheap and
available in the paint aisle at the store.
It is also, as the steamers know, flammable, but it does extinguish
with water and does not go boom.? In addition to WD40, I've used it
(both outdoors) and turpentine effectively to remove caked grease in
the past.? Don't get impatient though, it does take a while to soak
clear through.? Do not use rubbing alcohol though - high percentage
of water that could make it worse (rust trumps varnish in a fist
fight) and if you use alcohol, oil (or WD 40 immediately on
release.? It leaves the metal totally unprotected with an affinity
for moisture.
Vintage single malt is also useful.....you put the denatured on the
part and the single malt in you.? It makes the waiting go so much
faster? 8-)
Warren L
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?
Just what i was thinking Warren. ?I have some WD40 on
it now. If that doesn't do i will visit Napa Auto Parts
and see if they have some brand of penetrating oil to put
on it.
Pete McLaughlin
?
Soak it down in a penetrating solution....if the
grease varnished, a couple of days in that may well
get it loose with no damage, pounding, heat issues.
Warren L
?
thanks John
Thats what i needed
to know. ?It looks like the original grease
dried in the die cast cover end of the shaft and
glued the shaft and the 45 tooth gear so they
could not turn. ?
I will gently pry the
shaft out and see if the die cast cover is still
capable of acting as a bearing or if I need to
take further action to repair or replace.
Sincerely
Pete McLaughlin
?
Hi Pete,
I made the dog clutch in 2009 so don't
recall the details. I do know it wasn't
difficult to remove and replace that shaft
without removing the die cast cover on the
end of the machine.
However, it's trivial to remove the die
cast cover, it's held by two socket head
bolts - takes only a couple minutes to
remove with gears and fwd/rev in place.
Once off you can see that the cover does
function as the bearing for that end of
the shaft; the bracket serves as the
bearing closer to the mid point of that
shaft.?
If the shaft seized in either bearing then
you need to get it out of the seized
bearing (which could be a challenge).?
Assuming you get it out without too much
damage you can drill or ream the hole a
little larger and make and press fit? a
brass bearing.? Clean up the shaft where
it seized, add a little lube, reassemble
and it's probably better than new.
John
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Re: Reversing gear problem
Just what i was thinking Warren. ?I have some WD40 on it now. If that doesn't do i will visit Napa Auto Parts and see if they have some brand of penetrating oil to put on it.
Pete McLaughlin
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On Aug 3, 2017, at 8:07 AM, Warren LeMay notebook@... [7x12minilathe] < 7x12minilathe@...> wrote:
?
Soak it down in a penetrating solution....if the grease
varnished, a couple of days in that may well get it loose with no
damage, pounding, heat issues.
Warren L
?
thanks John
Thats what i needed to know.
?It looks like the original grease dried in the die cast
cover end of the shaft and glued the shaft and the 45
tooth gear so they could not turn. ?
I will gently pry the shaft out
and see if the die cast cover is still capable of acting
as a bearing or if I need to take further action to repair
or replace.
Sincerely
Pete McLaughlin
?
Hi Pete,
I made the dog clutch in 2009 so don't recall the
details. I do know it wasn't difficult to remove and
replace that shaft without removing the die cast
cover on the end of the machine.
However, it's trivial to remove the die cast cover,
it's held by two socket head bolts - takes only a
couple minutes to remove with gears and fwd/rev in
place. Once off you can see that the cover does
function as the bearing for that end of the shaft;
the bracket serves as the bearing closer to the mid
point of that shaft.?
If the shaft seized in either bearing then you need
to get it out of the seized bearing (which could be
a challenge).? Assuming you get it out without too
much damage you can drill or ream the hole a little
larger and make and press fit? a brass bearing.?
Clean up the shaft where it seized, add a little
lube, reassemble and it's probably better than new.
John
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Re: Reversing gear problem
Soak it down in a penetrating solution....if the grease
varnished, a couple of days in that may well get it loose with no
damage, pounding, heat issues.
Warren L
toggle quoted message
Show quoted text
?
thanks John
Thats what i needed to know.
?It looks like the original grease dried in the die cast
cover end of the shaft and glued the shaft and the 45
tooth gear so they could not turn. ?
I will gently pry the shaft out
and see if the die cast cover is still capable of acting
as a bearing or if I need to take further action to repair
or replace.
Sincerely
Pete McLaughlin
?
Hi Pete,
I made the dog clutch in 2009 so don't recall the
details. I do know it wasn't difficult to remove and
replace that shaft without removing the die cast
cover on the end of the machine.
However, it's trivial to remove the die cast cover,
it's held by two socket head bolts - takes only a
couple minutes to remove with gears and fwd/rev in
place. Once off you can see that the cover does
function as the bearing for that end of the shaft;
the bracket serves as the bearing closer to the mid
point of that shaft.?
If the shaft seized in either bearing then you need
to get it out of the seized bearing (which could be
a challenge).? Assuming you get it out without too
much damage you can drill or ream the hole a little
larger and make and press fit? a brass bearing.?
Clean up the shaft where it seized, add a little
lube, reassemble and it's probably better than new.
John
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Re: Reversing gear problem
any way to heat the mechanism up and break the gears free to turn before trying to disassemble? ?
Ralph
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Re: Reversing gear problem
thanks John Thats what i needed to know. ?It looks like the original grease dried in the die cast cover end of the shaft and glued the shaft and the 45 tooth gear so they could not turn. ? I will gently pry the shaft out and see if the die cast cover is still capable of acting as a bearing or if I need to take further action to repair or replace.
Sincerely Pete McLaughlin
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On Aug 3, 2017, at 6:14 AM, John@... [7x12minilathe] < 7x12minilathe@...> wrote:
?
Hi Pete,
I made the dog clutch in 2009 so don't recall the details. I do know it wasn't difficult to remove and replace that shaft without removing the die cast cover on the end of the machine.
However, it's trivial to remove the die cast cover, it's held by two socket head bolts - takes only a couple minutes to remove with gears and fwd/rev in place. Once off you can see that the cover does function as the bearing for that end of the shaft; the bracket serves as the bearing closer to the mid point of that shaft.?
If the shaft seized in either bearing then you need to get it out of the seized bearing (which could be a challenge).? Assuming you get it out without too much damage you can drill or ream the hole a little larger and make and press fit? a brass bearing.? Clean up the shaft where it seized, add a little lube, reassemble and it's probably better than new.
John
|
Re: Reversing gear problem
Hi Pete,
I made the dog clutch in 2009 so don't recall the details. I do know it wasn't difficult to remove and replace that shaft without removing the die cast cover on the end of the machine.
However, it's trivial to remove the die cast cover, it's held by two socket head bolts - takes only a couple minutes to remove with gears and fwd/rev in place. Once off you can see that the cover does function as the bearing for that end of the shaft; the bracket serves as the bearing closer to the mid point of that shaft.?
If the shaft seized in either bearing then you need to get it out of the seized bearing (which could be a challenge).? Assuming you get it out without too much damage you can drill or ream the hole a little larger and make and press fit? a brass bearing.? Clean up the shaft where it seized, add a little lube, reassemble and it's probably better than new.
John
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last time I tried to figure it out, they were fighting over with
or without a chuck.....I gave up.
I'm pretty sure it was sold as a 14, but I never ran out of room,
so I didnt worry about it too much.
Thanks
W
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?
Hi Warren,
You most likely know this, but I will say it anyway for
the benefit of those that might not.
Set your tailstock as far to the right as it will go and
still be able to clamp up on the bed.
Place a center in the headstock spindle and another in the
tailstock. Measure between centers and that is the center
distance. Basically, the longest piece that can be turned
between centers.
Dick
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Re: Reversing gear problem
Pete, The shaft for the dog clutch is one piece, no central shaft.? I did a crude sketch which can be interpreted as showing a shaft but the drawing shows the part more clearly, see: http://www.gadgetbuilder.com/DogClutchCAD.jpg ? Sorry about the confusion. John
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OldToolmaker
Warren LeMay
GadgetBuilder
