Author Topic: Southbend Metric Transposition set.  (Read 13154 times)

Offline mklotz

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Re: Southbend Metric Transposition set.
« Reply #30 on: January 01, 2015, 03:50:52 PM »
Even better than adding it to the list of available emoticons would be a forum software feature that automatically places it before any mention of emoticons or spreadsheets in the text of a reply.
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Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #31 on: January 01, 2015, 06:20:25 PM »
This is the part where you woke up right Marv?
"Mister M'Andrew, don't you think steam spoils romance at sea?"
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Offline mklotz

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Re: Southbend Metric Transposition set.
« Reply #32 on: January 01, 2015, 07:22:22 PM »
This is the part where you woke up right Marv?

???
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Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #33 on: January 11, 2015, 08:38:07 PM »
OK....got a ME day!    wooohoooooo!

Got the 127 tooth gear up on the lathe.   to do that I had to drill two 3/8" holes on a 5" dia bolt circle so that I could strap it to a plate.

Once there, I checked the pitch dia with the OD and it was pretty darn good...so I trammed it to the OD...and then tightened the two clamp bolts....takes a bit of jockeying...but I got it to about .0005" eventually.

Then I took just enough of a cut on the bore with a boring bar to clean it up....about .005" as far as I can figure.

"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #34 on: January 11, 2015, 08:39:10 PM »
Next up, the 100 tooth gear gets the same treatment....at least as far as checking the run out!...

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Don1966

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Re: Southbend Metric Transposition set.
« Reply #35 on: January 11, 2015, 11:56:43 PM »
Well it's about time that Samantha Bell got a work out.  :stickpoke:

Don

Offline Mosey

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Re: Southbend Metric Transposition set.
« Reply #36 on: January 12, 2015, 12:11:41 AM »
Right behind you, Dave. My faceplate is only about 7". A pleasure to follow such clear direction along.
My lathe isn't as clean as yours, though.
Mosey

Offline b.lindsey

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Re: Southbend Metric Transposition set.
« Reply #37 on: January 12, 2015, 12:30:39 AM »
Oh cool...we got dueling lathes here. We need some banjo music to go along wit it  :lolb:  It is nice you guys can do this together though...one of the great things about forums like this.

Bill

Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #38 on: January 12, 2015, 01:11:30 AM »
And here we are!   

the bores ended up at 0.993"...should have just bored them to an even inch...but no never mind

The bore of the bushing is about .627"....and is a good fit on the busing.   I measured the old bushing and it wouldn't have fit anyway without boring out....so Kit of parts.....

Now to clean and paint to get rid of the made in china paint!   

Dave
« Last Edit: January 12, 2015, 01:37:04 AM by steamer »
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Offline dieselpilot

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Re: Southbend Metric Transposition set.
« Reply #39 on: January 12, 2015, 02:52:11 AM »
Nice job. I've had my eye on that set for years thinking about making it fit my Clausing, I'd have to make a banjo to mount it as well.

Greg

Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #40 on: January 12, 2015, 03:00:25 AM »
Greg,

A 47/37 is REALLY close to perfect....The error is about .0002"/foot....so less than the leadscrew error....and it fits under the gear cover a lot better....


Dave
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Damned ijjit!

Offline Mosey

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Re: Southbend Metric Transposition set.
« Reply #41 on: January 12, 2015, 02:16:03 PM »
Bill, duel with Dave? Are you kidding? Just the suggestion caused an earthquake up there last night!
So, here's the project: 2 gears, 127/100 need to be mechanically sandwiched and run concentrically on the back shaft.
The central hub is not correctly attached or concentric.
Remove existing defective hubs and pins
Make and install a new hub to carry the 2 gears, boring out the centers of the 2 gears to accept a new precise hub, loctite and pin them together.
Mount on on the banjo on the lathe (door doesn't clear gears)
Mesh, space, and grease gear train
Paint gears South Bend grey.
Make metric parts  :DrinkPint: :DrinkPint:

Dave, sound right?
Mosey

Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #42 on: January 13, 2015, 02:46:31 AM »
Sounds like a plan!

Dave
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Damned ijjit!

Offline steamer

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Re: Southbend Metric Transposition set.
« Reply #43 on: January 16, 2015, 02:13:34 AM »
Yo Robert!

Once you have the two gears running concentric with their bores...and yours may be fine!   Loctite the bushing in place with the two gears up against each other tight.


On my pair, the 127 tooth gear bore was too big for the center bushing...so it wobbled and had a lot of free motion about the bushing...even with the two pins in it.

Making a new bushing and boring the two of them out to be sure, solved that problem completely.

Now that they are loctited together, they'll never come apart, but I'll put a pin in anyway.

Does that answer your question?

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Mosey

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Re: Southbend Metric Transposition set.
« Reply #44 on: January 16, 2015, 02:10:38 PM »
Dave,
Yes, that answers my question. I was puzzled by the fact that my gears barely wobbled at all, so I kept wondering what am I missing? I probably could have Loctited the assembly without taking it apart and been fine.
This job is the easiest, most basic I can imagine...boring 2 holes and making a 1" diameter sleeve.
Well, it's about done, but you didn't mention that getting the gears mounted concentrically to the faceplate was a fiddly PITA!
Thanks for your patience.
Mosey

I did discover that my inside Mike is not measuring correctly, so I will have to service that.
By the way, the cast iron in these gears is very fine grain and nice to cut.   :ThumbsUp: :ThumbsUp: