Re: $1000 Budget: Which 7 x 14 to buy?
Thanks; looks similar to a WARCO drive setup.
|
Re: $1000 Budget: Which 7 x 14 to buy?
Photo?  
|
Re: $1000 Budget: Which 7 x 14 to buy?
Could we get photos of the belt drive and an overall of your lathe? Thanks!
|
Re: belt slip on Mini Lathe Machine with 600W
I add the belt to my cart?
Next order from Amazon I will have one.
It is to make a pulley?
Thank you
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
When looking for my mini lathe I did find a few brands with back gear 7x12 .
But then cost and weight when up.?
If I had problem needing I had room to put a Bridgeport type back gear.?
I just machined a back plate for my 4 jaw chuck.?
I turn at a higher speed and had only little belt slipping.? After putting the problem on this group using molasses fixing the problem and high speed.?
FYI I do think back gears are good thing but weight and cost is not.
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
I have not tried knurling .
Still waiting for a part for tool post.?
I can knurl in mill?
Just chuck the part in drill chuck and knurling tool in vise.?
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
The closest thing I have been able to find to a "back-Gear" (-ish) on a Mini-Lathe (i.e., 7x) is the old style lathes that had a low range and high range by shifting a gear set (the ones that always broke) and the WARCO WM180 (7x12) which has a two-position belt drive. Both of these arrangements would allow for higher torque at lower speeds, but not like a true back-gear as are on larger lathes.
I think some of the confusion comes from not knowing what a back-gear actually is and perhaps also assuming that all "small" lathes are Mini-Lathes - there may be some 8.5x lathes that do actually have a back-gear, but these are theoretically outside the range of discussion for this group.?
|
Re: belt slip on Mini Lathe Machine with 600W
I receently upgraded my 550 watt brushed motor to a 1100 watt BLDC motor.?
??
In the process, I converted to a poly-v belt with 5 grooves.
?
I cut the pulleys based on the technique I saw in a "We Can Do That Better" video, I haven't used it this way for
very long, but I have not noticed any slipping when the motor stalls.
When do you notice the slipping? Is the belt tensioned enough?
What kind of lathe is that? It seems to have a gear train that is different than most of the traditional mini lathes.
I really like that gear banjo. I made one like that for my lathe and really like it.
Tom
??
|
Re: $1000 Budget: Which 7 x 14 to buy?
Pretty much all the folks I talk to knurl in back gear . I
suppose if the lathe goes slow enough & still has the power ,
backgear may not be needed . I always use back gear on my South
Bend when I knurl .
animal
On 12/2/23 8:44 AM, Charles Kinzer
wrote:
toggle quoted message
Show quoted text
Could you provide a link to a
mini-lathe with a back gear?? I have never seen one.? I'm
cuirous.
For most, I don't agree that
a back gear is needed.? The resulting extreme low speed is
especially useful for single point threading, but you don't
really need it and I think a lot of mini-lathe owners rarely,
if ever do single point threading anyway.? It can usually be
done easier with taps and dies if smaller thread sizes
And a quick change gearbox is
not a "must have" or even a "should have" in my view.? A few
probably make something home made, though.? And perhaps more
for the purpose of just doing it as a project because they may
never save the time later that it took to do the project.? And
a large number of Atlas (and Craftsman) lathes were sold
usually with just change gears.? According to Lathes.co.uk
Atlas did come even come out with a quick change gearbox as an
option until 10 years after they came out with a lathe.? I
believe a miniscule number of small hobby lathes have a quick
change gear box or any effort to add one.
Something like the mini lathe
is designed for a price point for the 99% of the market (no
back gear, no quick change gear box, no taper attachment, no
sophisticated collet closer, and so on) rather than the 1%.?
Of course, for real production environments almost always
using larger lathes, such things become a necessity - and
there is certainly an effect on price.
Charles E. "Chuck" Kinzer
On Saturday, December 2, 2023 at 08:16:09 AM PST,
davesmith1800 <davesmith1@...> wrote:
I think biggest two on looking at lathes is quick
change and back gears.
The back gear are found on a few mini lathe at high
cost.
The true quick change is not found.? You have go to a
larger lathe.?
I am put a DC motor on my lead screw .
I have thread dies upto 3/4" diameter so only need to
use change gears on odd threads. The motor is sitting on
my desk?
I look at this problem on the I just purchased in
November 20 2023.?
Dave?
|
|
|
Re: $1000 Budget: Which 7 x 14 to buy?
Ya can also look see if theres a makerspace in the area . Some of
them have monthly classes on machine usage & safety .
animal
On 12/2/23 6:42 AM, ChazzC wrote:
toggle quoted message
Show quoted text
You need to do some research then reach out to someone in your
area, visit their shop and with their help try their lathe. After
you have a better idea of what you need (& want), figure out
where you are going to put it and home much space will be
required. Then find the largest reasonably priced lathe you can
afford that will fit. Yes, you won't have your lathe immediately,
but in the end you will be happier with what you get.
|
Re: $1000 Budget: Which 7 x 14 to buy?
??? ??? Great sayin Bruce . I use my belt sander the most out of
all my abrasive tools in my shop . I have one grinder that has a
white wheel on it that I use for touch ups on bit's & than a
cheap diamond hone from Wallmart for final honing . Odds are real
good that if ya buy a new grinder that unless ya buy a new Baldor
or the like that the wheels will be so far out of wack that they
will either need a ton of work or replacing . White wheels are not
that expensive & they run cooler . There's a lot of youtubes
on tool bit sharpening . The article that Bruce linked is a good
article . Mrpete22 has a couple on youtube that are real good
& there's lots of plane for sharpening jigs online.
HSS tool blanks are pretty cheap , if ya want to practice tool
bit sharpening just get some keystock in the size ya will be using
& practice with that.
animal
On 12/2/23 6:32 AM, Bruce J wrote:
toggle quoted message
Show quoted text
An alternative is a belt sander with an 80 or 60 grit belt, which
works well, AND has other uses in your shop. (I’m a big proponent
of Alton Brown’s dictum “There should be no uni-taskers in your
kitchen (or shop, in this case:-) other than a fire extinguisher"
I get good results even with a cheap HF 1” belt
sander.
He reccomends a 2” one, but he’s also grinding
bigger tools than the ?” ones I use.
I also made a sort of ‘zero clearance’ plate for the
table, which helps considerably.
On Dec 1, 2023, at 10:08 PM, Charles Kinzer
< ckinzer@...>
wrote:
Or some of these things and other things
might be "should haves" in your case.? Or even just
"could haves."? Only you can know.? And since you are
new to this, your probably don't know.? So, it might
be best to wait until you start "making chips" and
then if a need arises, get it then.
In case you didn't notice, I slipped in
"grinder".? Personally, I can't see having a lathe
without having at least something like a six inch
bench grinder for grinding tool bits.
--?
Bruce Johnson
"Wherever you go, there you are." B.
Banzai, PhD
Attachments:
|
Autocad 2000 on Windows 11 64 bit.
Dave?
|
Re: belt slip on Mini Lathe Machine with 600W
Older style timing belts that used trapezoid-shaped teeth, did make noise. ? New (as in the late 20th century) belts use rounded tooth profiles and are a big improvement in terms d noise, wear and timing precision. They are nearly silent in the tiny sizes we are talking about. ?The belt manufacturers all have good technical articles on their websites.
That said v-belts are surprisingly efficient, synchronus belts have only about a 5% advantage.
toggle quoted message
Show quoted text
On Dec 2, 2023, at 6:19?AM, davesmith1800 <davesmith1@...> wrote:
They make mini lathes with either.
The downside to a timing belt is at high speed it is noisy from what read.?
I think a combo would be best but they build only all poly V or timing belt.
I may someday do that combination?
Dave?
|
I like yer drawings , what are ya usin for c ad ?
thanks
animal
On 12/2/23 7:57 AM, davesmith1800
wrote:
toggle quoted message
Show quoted text
Here better view of the barrow?
I the finger would be same size as the tap drill . Just makes
easier to make.?
Dave?
|
Re: belt slip on Mini Lathe Machine with 600W
??? It used to be IIRC that a V-belt of automotive size that was
had teeth was called a Cogged- belt . Cogged belts are/were very
common on? heave duty equipment that wanted all of the power it
could get through the belt? like farm equipment & some
construction equipment . I have a ditch witch that has 3 Cogged
belts . A lot of farm equipment also use link belts , but these
are very heavy duty link belts with metal clips , I haven't dealt
with one in a long time but I seem to recall the metal clips may
have been riveted in to the belts .
animal
On 12/2/23 2:18 AM, Miket_NYC wrote:
toggle quoted message
Show quoted text
"I thought all mini-lathes used timing belts,
not v-belts."
When the original poster said "toothed belt," I figured
that was what he was talking about, but then he mentioned he
was? getting slippage of V-belts. Other people here were
talking about V belts that have tooth profiles cut in the V
area to make them more flexible.?
Maybe all of these can be called "toothed belts"
casually, but I agree they're entirely different ways of
transmitting power.? A V-belt, whether or not it has teeth cut
in it, transmits power by pressing against the side of the
pulley groove. That's the kind of belt that profits from belt
dressings like molasses, honey, etc. A belt with teeth that
mate with pulleys that have matching teeth doesn't slip and
doesn't need belt dressing.??
I'm still not really sure which kind of belt the
lathe in question has, or even if it's a mini-lathe. There are
so many small lathes now, being made by companies in China and
elsewhere, that it could be anything.?
Mike Taglieri?
I thought all
mini-lathes used timing belts, not v-belts.? My HF 7X
lathe has a toothed belt that is about 10mm wide.
Timing bets are much more efficient and can be
smaller than v-belts and they don’t depend on
friction.
This is a good reference about V versus
Cogged/Toothed belts:
Once you know the profile of the belt
(there are many in
|
Re: $1000 Budget: Which 7 x 14 to buy?
Could you provide a link to a mini-lathe with a back gear?? I have never seen one.? I'm cuirous.
For most, I don't agree that a back gear is needed.? The resulting extreme low speed is especially useful for single point threading, but you don't really need it and I think a lot of mini-lathe owners rarely, if ever do single point threading anyway.? It can usually be done easier with taps and dies if smaller thread sizes
And a quick change gearbox is not a "must have" or even a "should have" in my view.? A few probably make something home made, though.? And perhaps more for the purpose of just doing it as a project because they may never save the time later that it took to do the project.? And a large number of Atlas (and Craftsman) lathes were sold usually with just change gears.? According to Lathes.co.uk Atlas did come even come out with a quick change gearbox as an option until 10 years after they came out with a lathe.? I believe a miniscule number of small hobby lathes have a quick change gear box or any effort to add one.
Something like the mini lathe is designed for a price point for the 99% of the market (no back gear, no quick change gear box, no taper attachment, no sophisticated collet closer, and so on) rather than the 1%.? Of course, for real production environments almost always using larger lathes, such things become a necessity - and there is certainly an effect on price.
Charles E. "Chuck" Kinzer
On Saturday, December 2, 2023 at 08:16:09 AM PST, davesmith1800 <davesmith1@...> wrote:
I think biggest two on looking at lathes is quick change and back gears.
The back gear are found on a few mini lathe at high cost.
The true quick change is not found.? You have go to a larger lathe.?
I am put a DC motor on my lead screw .
I have thread dies upto 3/4" diameter so only need to use change gears on odd threads. The motor is sitting on my desk?
I look at this problem on the I just purchased in November 20 2023.?
Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
I think biggest two on looking at lathes is quick change and back gears.
The back gear are found on a few mini lathe at high cost.
The true quick change is not found.? You have go to a larger lathe.?
I am put a DC motor on my lead screw .
I have thread dies upto 3/4" diameter so only need to use change gears on odd threads. The motor is sitting on my desk?
I look at both problems on the lathe I just purchased in November 20 2023.?
Dave
|
Here better view of the barrow? I the finger would be same size as the tap drill . Just makes easier to make.? Dave?
|
Re: $1000 Budget: Which 7 x 14 to buy?
You need to do some research then reach out to someone in your area, visit their shop and with their help try their lathe. After you have a better idea of what you need (& want), figure out where you are going to put it and home much space will be required. Then find the largest reasonably priced lathe you can afford that will fit. Yes, you won't have your lathe immediately, but in the end you will be happier with what you get.
|
davesmith1800