Overhaul of a 9" SB model "A"

[steamer]

Alright....sweated my )#&*(*@ off in the shop today to accomplish the following, but I'm nearly done.

Flipping the part to machine the back

Machining the center relief

Moving the ram back to make the angle cuts

Tramming the 45 degree angle to the sine bar

Vee cut

 

[steamer]

More

Cutting the center relief....just like the factory one

Cutting the Vee relief with a big saw.

Cutting the relief on the center transverse tongue ( at 30 degrees)

Cutting the tailstock offset features.

TS fits good on the lathe It is about .020 high at the moment. Plenty of stock to scrape in with.

I still need to make the central block for the offset screws to bear against, and then round the corners and paint.

Dave

 

[steamer]

Here's the last for today

and

Dave

 

[steamer]

Scratch vertical slide off the list. Just scored this

Dave

 

[ttrikalin]

where do you mount this?
on the compound cross slide?

t

 

[steamer]

Hi Tom,

I have W.R. Smiths book as seen thus

The set up I am after is what is on the cover of this book "Clockmaking and Modelmaking tools and Techniques"
by W.R. Smith.

The end result is a small gear cutting capability on the lathe. Chuck the stock, turn and bore, cut the teeth, part it off. All in one setup. You can't beat that concentricity at home.

This is an awesome book and I highly recommend it to all. Even if you don't make a clock. There are many high precision techniques to be gleaned from this book.

You can find it at his website
http://www.wrsmithtelegraphkeys.com/index.htm

I have spoken to him and he's about the nicest man I have ever met.



Dave

 

[ttrikalin]

thank you.

 

[crab]

Hi Dave.Have you seen this home made power scraper? Might save you some time roughting out.A lot cheaper than a Biax.
Crab

http://www.machinistweb.com/forum/showthread.php?t=501

 

[steamer]

Hi Crab!
Thank you for your interest and support!

I don't think "I" could get those results with that rig though.

I'll stick to my wee Anderson, and cunning.

It'll be a while before I bring the TS up for scraping as I need to continue the tear down to the bare bed, and finish the refurb of the cabinet base. Then I can level up the bed for real and get some real alignment numbers. After I scrape the TS base in for bearing with the ways, I'll cut most of the rest of the .020 high off with the mill from the top....leaving about .004 for scraping on the top of the TS base....that'll come off in an hour or two by hand.
I know ...at least for me...that I can control that and end up where I want it to be....by hand.

Dave

 

[ttrikalin]

dave,

I have photocopies of "Machine tool reconditioning and applications of hand scrapping" -- but have never seen a scrapping session.
A you tube search does not yield a lot of results...

Any chance you would make short videos showing basic technique... at some point in the future... or how would you suggest one learns... take a scrap piece and have at it...?

take care,
tom in MA

 

[gmac]

Tom;
Lindsay Books used to have several books solely on hand scrapping, inventory varies from time to time, so best to check with them by phone to see what is currently "in print", examples;

http://www.lindsaybks.com/bks9/hscrape/index.html

http://www.lindsaybks.com/bks/lathsc/index.html

http://www.lindsaybks.com/prod/sub/machine.html

Best to request a catalog as well. I found the website difficult to locate stuff, but they were great to deal with.

Cheers
Garry

 

[steamer]

There are a few good references on the web

Check out Youtube and Nick Mueller

[ame]http://www.youtube.com/watch?v=uHF7TtHVSWE&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=esAqz6bCVyQ&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=LQhsDtS--wU&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=7yeqSjT7UBE&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=8kWbIxB4z3s&feature=related[/ame]

[ame]http://www.youtube.com/watch?v=pVB3WuxrAG0&feature=related[/ame]


And several others


Additionally, check out Mike's webpage and book

http://www.machinerepair.com/Book.html


Great book!

Dave

 

[steamer]

Tom,

I am going to have to make a master to scrape in the TS base top. It is basic stuff...which is good because I only "Play" at scraping and don't do it for a living....Thank God!

However, I could try to incorporate the build of that into this thread and at least show you how "I" go about it....usual caviates apply....Your mileage may vary...non professional driver on closed course...ect.

BUT NOT TODAY! TOO DAMN HOT! 106F at work today

I might also point out that Home Shop Machinist is running a series on scraping right now.

Forrest Addy does semi regular classes on scraping at various locations. I am not aware of any in the North East though Tom....But I've heard good things Check out the PM board occasionally.

Dave

 

[vedoula]

thank you very very much for these pointers!

tom (from anastasia's account) in MA

 

[steamer]

Your Welcome Tom! Anastasia too! ;D

 

[steamer]

OK that looks better with a rolled over edge...

Dave

 

[steamer]

Scratch faceplate off the list...

Now for the motor drive
I drilled (2) 5/16-18 to mount up my new motor. That's all pretty much done now except for mounting on the cabinet. There is a bracket for that. When I do up the cabinet I'll finish that off

Now for the tear down of the headstock. Here it is as is.

I'll start with the tumbler reverse.
Disassembled pretty grungy...

Cleaned and painted...I'll put new wicks in tomorrow and put it back together.

Dave

 

[ttrikalin]

Your Welcome Tom! Anastasia too! ;D

yes we both like your thread very much. I because I learn a ton, ansastasia because the mere fact that there are other "loonies" out there makes her feel better about me... :big:

it's coming along very nicely...

take care,

tom

 

[steamer]

Oh if we get Anastasia and My wife together....They can compare notes!....and coping mechanisms.. ;D

Dave

 

[steamer]

Finished the tumbler gear with wicks today, and then finished off the back gear assembly....All needed nothing more than a good cleaning with a wire brush and mineral spirits and then some new wicks...and a spot of paint...not much to report. I get into the spindle proper this coming week. Luckily though nothing is worn out!...or even worn!

Dave