I like yer drawings , what are ya usin for c ad ?
thanks
animal
On 12/2/23 7:57 AM, davesmith1800
wrote:
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Here better view of the barrow?
I the finger would be same size as the tap drill . Just makes
easier to make.?
Dave?
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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:
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"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
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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?
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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
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Here better view of the barrow? I the finger would be same size as the tap drill . Just makes easier to make.? Dave?
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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.
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Re: $1000 Budget: Which 7 x 14 to buy?
On Fri, Dec 1, 2023 at 08:14 PM, Macrohenry wrote:
I'm suspecting that my quest is kind of a chicken and egg situation. You have to have used a lathe some before you actually know what to buy.
Unfortunately this is very true. Unless they have prior experience, many people tind that their first lathe falls short of their expectations. I can't agree with those saying they are all the same, buy the cheapest one you can find. The seller matters, Chinese lathes have notoriously bad quality control, some are great out of the box, and some seem to ship unfinished or even with the wrong parts installed. Buying from a quality seller who will make things right if you have issues can save you a lot of headaches. Grizzly, Harbor Freight, Little Machine Shop and Micromark will take care of you if you get a lathe with issues. A lot of the Amazon and ebay sellers will just run you in circles trying to get you to take a discount on the boat anchor you received. Now some do get a decent lathe from these low end sellers, but it is a gamble.
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Re: $1000 Budget: Which 7 x 14 to buy?
Second the grinder. Carbide tools will chip and become useless far too easily
I think carbide tools are cheaper than a grinder.? Also a beginner gets very usable professional quality tools with no grinding skill required.
Yes, making your own tool bits by hand is an “old-timer” skill but it has a learning curve and requires a grinder. On Dec 1, 2023, at 9:08?PM, Charles Kinzer < ckinzer@...> wrote:
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.
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Re: $1000 Budget: Which 7 x 14 to buy?
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
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Re: belt slip on Mini Lathe Machine with 600W
 Here photo of belts I may some day take larg pulling and a timing belt and use a great ratio for great power for low speed turning and threading.? Dave?
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Re: belt slip on Mini Lathe Machine with 600W
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?
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Re: Great flea-market deal (on something I don't really need)
As I said, the thing I bought in Maine last week is not a pin vise. It's a very high-end miniature chuck. I wish it went up a little larger, but for $10 I can't complain.
I do also have several Starrett pin vises (yet another flea market find, decades ago).? I used to drill 1/16" and smaller holes by holding one of those in my regular drill chuck. But that's way inferior in accuracy to what I'll get holding this Albrecht chuck in an endmill holder. (And I even happen to have a 1/2" endmill holder I never use, so it all works out).
Mike Taglieri?
On Fri, Dec 1, 2023, 4:41 PM mike allen < animal@...> wrote:
Ok ?
animal
On 12/1/23 11:32 AM, Charles Kinzer
wrote:
Pin vises would not typically
(or not at all in my opinion) have a ground shank like that.?
Also, the handles are typically not a large diameter like that
since they are meant to be used with some finesse.? Various
small chucks like that are sold with everything like a shank
like that to one that will fit in a Dremel tool collet or
similar.
Charles E. "Chuck" Kinzer
On Friday, December 1, 2023 at 10:46:56 AM PST, mike
allen <animal@...> wrote:
??? Nice score . I have a 4 piece set of Starrett pin
vise's? like that , There real handy if ya ever need
to drill out any jets in carburetors too .
animal
On 12/1/23
4:40 AM, Miket_NYC wrote:
As I've mentioned here before, I often go to
Pennies on the Dollar, an indoor flea market in
southern Maine.? There's a guy there who sells tools
& accessories, and on Black Friday I nabbed a
large bag of taps I really wanted, from a
machinist's?estate sale, so they were US brands, and
they ranged from 1/2-20 down to 3-56.
Then, as an afterthought, I offered the guy $10
for this, which I figured was a weird little pin
vise of some sort I might have a use for. He knew
even less about it than I did.
It turns out it's an Albrecht standard 0-1.5 mm
chuck in nice condition, listing for $699 new. It's
on a genuine Jacobs 1/2" shaft that's a nice sliding
fits in my 1/2" R8 endmill holder.
So now I'm all set if I want to drill tiny holes,
1/16" and smaller. Only problem is I hardly ever
need to drill such small?holes. (And the machinist
who previously owned this probably didn't either,
which explains its very nice condition).
So now this will go in MY machinist's chest and
probably be rarely used. If it ever winds up in my
estate sale, I hope it brings more than ten buck....
Mike Taglieri?
Attachments:
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Re: belt slip on Mini Lathe Machine with 600W
"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
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Re: belt slip on Mini Lathe Machine with 600W
Without a photo of what you have I can't figure out why you are having a problem; this is the drive belt on my 7x16:  While it can wear if mis-aligned on not properly tensioned, there's no way it can slip.
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Re: belt slip on Mini Lathe Machine with 600W
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.
toggle quoted message
Show quoted text
On Dec 1, 2023, at 10:02?PM, BuffaloJohn <johndurbetaki@...> wrote:
This is a good reference about V versus Cogged/Toothed belts:
Once you know the profile of the belt (there are many in
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Re: belt slip on Mini Lathe Machine with 600W
This is a good reference about V versus Cogged/Toothed belts:
Once you know the profile of the belt (there are many including metric and imperial variations) you can find the equivalent belt in a cogged belt. Most belts have ID information imprinted on them. Decoding that can be fun, but it isn't that hard. Profiles are published online and measuring the top width, bottom width, and depth will let you get the profile figured out. Belts are measured as outer length or circumference, which can be a little tricky if the belt is stiff, but a table top with your ruler or tape works well.
On Fri, Dec 1, 2023 at 9:52?PM BuffaloJohn via <johndurbetaki= [email protected]> wrote: The place the tooth or cog needs to be is in the pulley groove, so the bottom example you referenced would be the prefered profile. This was the style of the cogged (toothed) belt I replaced for both applications I had referred to.
If the original belt has the profile of the top example, then you would choose that, but that is less common. That top cog example would need an idler that is also a pulley shape though not as deep a groove. On Fri, Dec 1, 2023 at 7:23?PM Jon Rus? wrote:
Are you saying something like the Dayco
TOP Cog belt
Like ?
or the BOTTOM Cog belts
Like ?
There does need to be enough room for
the belt and a small belt needs to be manufactured.
----OR----
Are you talking about something else?
--
Buffalo John
--
Buffalo John
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Re: belt slip on Mini Lathe Machine with 600W
It is a poly v belt not a v belt?
Dave?
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Re: belt slip on Mini Lathe Machine with 600W
The place the tooth or cog needs to be is in the pulley groove, so the bottom example you referenced would be the prefered profile. This was the style of the cogged (toothed) belt I replaced for both applications I had referred to.
If the original belt has the profile of the top example, then you would choose that, but that is less common. That top cog example would need an idler that is also a pulley shape though not as deep a groove.
On Fri, Dec 1, 2023 at 7:23?PM Jon Rus? wrote:
Are you saying something like the Dayco
TOP Cog belt
Like ?
or the BOTTOM Cog belts
Like ?
There does need to be enough room for
the belt and a small belt needs to be manufactured.
----OR----
Are you talking about something else?
--
Buffalo John
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Re: $1000 Budget: Which 7 x 14 to buy?
I think carbide tools are cheaper than a grinder. ?Also a beginner gets very usable professional quality tools with no grinding skill required.
Yes, making your own tool bits by hand is an “old-timer” skill but it has a learning curve and requires a grinder.
toggle quoted message
Show quoted text
On Dec 1, 2023, at 9:08?PM, Charles Kinzer <ckinzer@...> wrote:
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.
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Re: $1000 Budget: Which 7 x 14 to buy?
It would help trying before buying good luck .?
The power feed my lathe came hex nut at end of lathe lead screw so using a socket on motor to drive the screw .?
The hard part is finding a DC motor to wide speed at less 60 to 1 different like milling feed.? Right now I going to try a 20 rpm motor for low speed work.?
Making so I can easily change the gear motor. It cheaper than buying a wide range motor.?
Dave?
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davesmith1800
BuffaloJohn