On Tue, 1 Feb 2022, Miket_NYC wrote:

Saw this on the Metal-Shapers-and-Planers group. At first?glance it looked like the usual fluff for bored housewives and New Age kooks.??

BUT it has Volumes 1 and 2 of the Machinist's Bedside Reader, which has been out of print for years. It also has (an old) Machinery's Handbook.

These are probably illegal pdfs and I try to be a good boy, but when a book is in high demand and the publisher seems to have no interest in reprinting it, that seems
like a justifiable reason.

Mike Taglieri?

Do you have the url for these books?

On Wed, Feb 2, 2022 at 6:25 AM, kaje7777

<kevin.quiggle@...> wrote:

Some time ago I put together a list of free books online of interest to machinists; go to the link below and scroll down to "Books and Manuals - Free" :



A couple of related notes:

1. I haven't checked this list in some time, so some of the links may be broken
2. A while ago Google "improved" google Sites and forced a migration to the new version, which lacks many functions of the old version, such as internal linking. Unfortunately this greatly reduced the usability of my Sites based website.

On Jan 31, 2022, at 4:23 PM, Stan Gammons via <buttercup11421@...> wrote:

?

Thanks everyone for the replies on this.? The backsplash is still in place. I'll remove it and see if I can adjust the carriage so it moves easier once I have some more time.


Stan

On 1/31/22 08:53, GadgetBuilder wrote:

The adjustment scheme for the carriage slide plates works better on large lathes than it does on our small machines.? Most 7X owners find that shimming the slide plates is easy and works well.? In addition, it often helps considerably to refine the bed thickness where the slide plates run.? See:


John

?

--?
Bruce Johnson

The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.

?

?

I decided to take the apron off this afternoon and may have found the problem or part of the problem.? When I turn the carriage hand wheel with the apron off, there's a spot that offers some resistance to turning. There are some metal shavings inside the apron and gears too. Maybe a good cleaning and making a cover for the gears is in order. I have a piece of .05" thick plaskolite that I could use for that purpose.? With the apron off, the carriage moves back and forth pretty well. I don't have the experience to know if it's too snug. I'll see how easily the carriage moves once I get the apron cleaned and put back on. I assume white lithium grease is what I should use on the gears?

Stan

?

Bruce, it is not being a broken record when what you are saying is worthwhile advise. And I completely agree that Ted Hansen’s book is very worthwhile and very reasonably priced. Check out “Machine Tool Reconditioning” for a shock! Any minilathe owner

Could profit from some of the projects he very clearly describes. And as for HSM references, I completed my collection by purchasing the first six issues. A complete collection is easy if you started 39 years ago!?? Bill in Boulder

?

Sent from for Windows 10

?

From: Bruce J
Sent: Monday, January 31, 2022 20:22
To: [email protected]
Subject: Re: [7x12MiniLathe] Saddle/Carriage adjustments

?

I kinda feel like a broken record on this subject :-) but Ted Hansen's ‘Complete MiniLathe Workshop’ (available from Village Press ?) has a discussion of this very problem, and two solutions: one quick and dirty, basically shimming the existing saddle plates to provide better contact, and a more robust fix, switching to u-shaped saddle plates, similar to those on bigger lathes like South Bend, that considerably improves the rigidity of the mini lathe.?

?

Also a custom wrench: a bit of an allen wrench brazed to the top of a C-shaped piece of rod, allowing you to tighten the saddle plate screws without removing the front apron.?

?

I find myself again wishing they’d sell HSM in digital archive form, because there’s all sorts of references out there to this or that other back issue and it would really be nice to be able to just call it up, instead of having to troll through eBay for some well-thumbed old copy.?

?

All my woodworking magazines offer this and it’s very convenient. ?

?

I’d even be happy with just an online access instead of a portable copy.?

On Jan 31, 2022, at 4:23 PM, Stan Gammons via <buttercup11421@...> wrote:

?

Thanks everyone for the replies on this.? The backsplash is still in place. I'll remove it and see if I can adjust the carriage so it moves easier once I have some more time.


Stan

On 1/31/22 08:53, GadgetBuilder wrote:

The adjustment scheme for the carriage slide plates works better on large lathes than it does on our small machines.? Most 7X owners find that shimming the slide plates is easy and works well.? In addition, it often helps considerably to refine the bed thickness where the slide plates run.? See:


John

?

--?
Bruce Johnson

The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.

?

?

?

Does MSC send out free shipping codes anymore???

They used to send out a free shipping code for a $99 order, and very rarely a $50 order. But I have not seen a code in quite a while.

Regards,
Kevin Jones

This is precisely the use case for a following rest.?

On Feb 1, 2022, at 10:34 AM, Ryan H via <ifly172@...> wrote:

Okay, I'll tell, I was doing a piece about a foot long and 3/8" dia and the ends were spot on but the shaft was larger in the center when I measured all along it. I was cutting towards the head, backing the tool out, moving the carriage back to the right and then doing my next pass after advancing the tool in.?

--?

Bruce Johnson

"Wherever you go, there you are." B. Banzai, PhD

Many good suggestions on how to do better works, but none that address taper.

For example the tool.? Good ones cut better but let's say I make a tool bit by putting a drill bit in a vice and breaking it with a hammer and try to turn metalw iththe?jagged end.? It would be a horrible tool but uniformly horrible as it moves left to right

Same applies to a poorly chucked stock.? Lets say I place a square stock on a four jaw chuck and it is so "unstraight" I can see it from across the room.? After turning, it will be perfectly concentric the spin axis

I think there are only a few ways to cause taper

1) the stock deflects when cut, one end is unsupported?and you are taking cuts so deep that the stock deflects or

2) the carriage?is not parallel?to the spindle axis

3) A tailstock is used to short?the stock but the tailstock center is displaced from the spindle axis

Check for #3 with a razor blade. place a dead-center in the tailstock and spindle and move the points together?until?they almost touch.? Place some very thin and hard matter (like an old-style razor blade) between the point and if you can hold it there at 90 degrees.? It needs to be dead-on perfect to do this.

Mving the tailstock off center is the usual wy to?make an intentional taper.? Make sure you are not doing this

Then #2, after adjusting as above, support a rod from both ends and make a cut all the way.? If the work is held between centers there is no way it can have a taper, even if the spindle points away from the bed.

But sometimes?you want to use just?a chuck to hold the part.? You need to measure that the spindle is point down the bad.? ? Place a precision bar in the chuck and adjust out all the runout using a dial indicator.? This takes time.? ? ?Then you can see of the garage runs parallel to the "dialed in" bar.

Yes it is nice to have correct cut tool bits bt really all modern shops use carbide inserts

On Mon, Jan 31, 2022 at 11:53 AM Michael Jablonski <michaeljab@...> wrote:

You are using carriage handwheel to advance the carriage, and not the
compound to advance the cutter. Your photo almost looks like your compound
is set at an angle, and you are feeding using the compound instead of the
carriage. Another possibility is that you have a lot of slop in your cross
slide and/or compound. Have you tried locking the cross slide and compound
by tightening one of the gibs on them both? Also check the carriage. See if
you can grab the left and right sides, and try to twist, lift, rotate, see
if there is any movement in it that needs to be addressed. And as others
have stated, no back rake on the cutter when cutting brass.

Michael - California, USA
Micro-Mark MicroLux 7x16
LMS 3990 Hi-Torque Mill with power feed



-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Jack
Lunn via
Sent: Sunday, January 30, 2022 2:33 PM
To: [email protected]
Subject: [7x12MiniLathe] Unwanted taper when turning

Just getting started with a new to me HF 7X10 (extended to 16).? Trying to
practice on brass and the bit “digs” in as i move the saddle to the left.
This results in an inward taper.? I’ve tried to adjust the cross slide to
remove any play.? What should i check?

Thank you for any assistance!

Attachments:
image0.jpeg: /g/7x12MiniLathe/attachment/115637/0

--

Chris Albertson
Redondo Beach, California