Beginners LE 4-4-0 American

This forum is dedicated to the Live Steam Hobbyist Community.

Moderators: Harold_V, WJH, cbrew

User avatar
Pipescs
Posts: 1949
Joined: Wed Feb 03, 2010 10:16 pm
Location: Lester Alabama

Re: Beginners LE 4-4-0 American

Post by Pipescs » Sat Jan 01, 2011 9:26 pm

Link Bracket No. 1 is done. The other three are still in the square with all the holes drilled but not tapped yet.

I shaped this one using a qtr inch round headed end mill and then a motor tool.

The fancy little flute down the vertical side is a screw up on my part as I miss counted my turns and miss red the plans. Caught it and now will add the fancy flute to the other three.

And old woodworking friend told me years ago "It isn't screwed up till you can't fix it anymore"
Link Bracket No. 1 (3).jpg
Link Bracket No. 1 (2).jpg
Link Bracket No. 1 (3).jpg
Charlie Pipes
USMC Retired

Current Projects:

2.5 Baldwin 2-4-2/2-4-4/0-4-4 Conversion (What ever)
Little Engines American Restoration
Bobber Caboose

User avatar
Pipescs
Posts: 1949
Joined: Wed Feb 03, 2010 10:16 pm
Location: Lester Alabama

Re: Beginners LE 4-4-0 American

Post by Pipescs » Tue Jan 04, 2011 7:56 pm

Thanks Fender for the lead to Enco on the Olite Bushings.

While I am still working on the Link Brackets (I have finished the two left hand and only need to do the cosmetics on the other two) I have purchased the bar stock to make the journals from and the bushings from Enco today.

Journal boxes as drawn
Leading Truck Journals (3).jpg
I will be boring them to .75 and pressing in the Olite Bushings.
Leading Truck Journals (2).jpg


I assume the same clearance rules apply for pressing in a bushing as a roller bearing?
Charlie Pipes
USMC Retired

Current Projects:

2.5 Baldwin 2-4-2/2-4-4/0-4-4 Conversion (What ever)
Little Engines American Restoration
Bobber Caboose

User avatar
Bruce_Mowbray
Posts: 644
Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Beginners LE 4-4-0 American

Post by Bruce_Mowbray » Wed Jan 05, 2011 1:38 pm

You will only need .0003-.0005 interference on a bushing that is 3/4" OD. Oil lite bronze crushes very easily and if you have too much interference, you will not be able to get your axle through the hole. As a minimum reference, your bearing hole size will get smaller by the amount of interference you have in the press fit. Especially on thin walled bushings.
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

kvom
Posts: 1163
Joined: Thu May 08, 2008 11:38 am
Location: Cumming, GA

Re: Beginners LE 4-4-0 American

Post by kvom » Wed Jan 05, 2011 1:47 pm

Wouldn't it then make sense to bore the bushing after pressing?

User avatar
Fender
Posts: 2843
Joined: Wed May 02, 2007 8:33 pm
Location: Chattanooga TN

Re: Beginners LE 4-4-0 American

Post by Fender » Wed Jan 05, 2011 5:08 pm

If it were me, I would just make the bushings a sliding fit and loctite them in place. If you choose to make a press fit, and then need to bore them later, remember the admonition to use very sharp tools so you don't wipe the pores closed on the oilite.
Dan Watson

User avatar
Bruce_Mowbray
Posts: 644
Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Beginners LE 4-4-0 American

Post by Bruce_Mowbray » Thu Jan 06, 2011 6:58 am

I can answer the past two questions.

Unless you use micro sharp (extreamly) tools, the boring tool will smear the surface of the bushing, making the "oil" part of the oil lite bushing less effective by closing the tiny pores in the surface of the bushing..

Loctite does not work well with Oil lite bushings because of the -well- "oilyness" of the bushing makeup. Using the cleaner for loctite washes a portion of the oil out of the bronze and allows some loctite to take it's place. This may reduce the effectivness of the oil part of the bushing. Granted, one could be carefull only to get a small amount of cleaner on the inside of the bushing and ones could soak the entire assembly submerged in oil to reload the bushing after assembly.
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

User avatar
Fender
Posts: 2843
Joined: Wed May 02, 2007 8:33 pm
Location: Chattanooga TN

Re: Beginners LE 4-4-0 American

Post by Fender » Thu Jan 06, 2011 10:00 am

Valid point about the oiliness. However, the bearing only needs to be retained in position. It's not like you would need the strength of a wheel/axle fit. A set screw could also be used, or you could machine a step on the outside of the bushing so it could only go in the hole a certain distance.
Dan Watson

User avatar
Bruce_Mowbray
Posts: 644
Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Beginners LE 4-4-0 American

Post by Bruce_Mowbray » Thu Jan 06, 2011 12:39 pm

Or,
A retaining snap ring...
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

User avatar
Pipescs
Posts: 1949
Joined: Wed Feb 03, 2010 10:16 pm
Location: Lester Alabama

Re: Beginners LE 4-4-0 American

Post by Pipescs » Thu Jan 06, 2011 7:18 pm

I am giving thought to making the bushing a light press fit then drill up thru the bottom of the journal box to use a brass set screwto come up into the olite and keep it centered. the screw would end just short of the inner facing of the bushing.

Any thoughts on this.
Charlie Pipes
USMC Retired

Current Projects:

2.5 Baldwin 2-4-2/2-4-4/0-4-4 Conversion (What ever)
Little Engines American Restoration
Bobber Caboose

User avatar
Fender
Posts: 2843
Joined: Wed May 02, 2007 8:33 pm
Location: Chattanooga TN

Re: Beginners LE 4-4-0 American

Post by Fender » Thu Jan 06, 2011 10:11 pm

Sounds like a plan!
Dan Watson

User avatar
Pipescs
Posts: 1949
Joined: Wed Feb 03, 2010 10:16 pm
Location: Lester Alabama

Re: Beginners LE 4-4-0 American

Post by Pipescs » Mon Jan 10, 2011 8:25 pm

Well the job is taking me out of state again. Not to get home prior to Feb. Hope to hook up with LE East as I will be working near them.

this is the state of the front truck. I have the last Link Bracket ready to dress up and hope to do that in the morning before I leave.
Coming Together.jpg
Charlie Pipes
USMC Retired

Current Projects:

2.5 Baldwin 2-4-2/2-4-4/0-4-4 Conversion (What ever)
Little Engines American Restoration
Bobber Caboose

User avatar
Bruce_Mowbray
Posts: 644
Joined: Sat Jan 04, 2003 7:45 pm
Location: Pennsylvania

Re: Beginners LE 4-4-0 American

Post by Bruce_Mowbray » Mon Jan 10, 2011 8:37 pm

The set screw idea is perfect. You could even use a steel screw for added strength.

Are you coming up to the Cabin Fever show next weekend? You will not be too far if you're going to be near Lancaster, PA.
Bruce Mowbray
Springville & Southern RR
TMB Manufacturing & Locomotive Works

Post Reply