Emma Victoria

This topic has 9 replies, 6 voices, and was last updated 19 December 2012 at 19:07 by Bill Dawes.

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15 December 2012 at 09:53 #106305
Eric Cox
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@ericcox50497
The article of Emma Victoria ME 4445 p844 describes the axle boxes fitted with Oilite bushes.

The concept of an Oilite bush is that it is impregnated with oil and does away with the need to manually lubricate it. So why drill an oil way through the bush ?.

Also the bush needs to be a press fit as stated but the bush is easily distorted so whether you drill an oil way or not it is worth while running a reamer through the bush.
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15 December 2012 at 09:53 #22375
Eric Cox
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@ericcox50497
15 December 2012 at 10:27 #106309
JasonB
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@jasonb
You should never use a reamer on oilite or any sintered bronze material, it tends to close up the pores making it unable to take in or release oil.

The bushes will dry out over time so the oil hole is there to top them up as it were. Also adding oil to the centre of the bush will tend to wash out any dirt, ash etc rather than it being carried into the bearing surface if you used the oilcan from teh outside

J

Edited By JasonB on 15/12/2012 10:31:17
15 December 2012 at 11:53 #106313
KWIL
Participant
@kwil
OIlite bushes are intended to press fit in their targeted location, it is the receiving hole that should be reamed to size, that way the sintered bush will end up with the designed hole, without the damaging use of a reamer as Jason points out.
16 December 2012 at 01:02 #106420
Ian S C
Participant
@iansc
The bush should be inserted into the reamed hole with a shouldered mandrel, the small dia should be the size of the shaft that will be used (it should be well polished). Ian S C
16 December 2012 at 09:26 #106429
Eric Cox
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@ericcox50497
Would it be worth machining a groove on the inside of the bush to act as an oilway ?
16 December 2012 at 10:19 #106437
Ian S C
Participant
@iansc
Eric, NO, NO, oilite bushes do not need oil groves, you stand a chance of cracking the bearing, they are made to the finished size, and ready to go. The oil is already inside the body of the bearing, it's sort of like a metalic sponge. Ian S C
18 December 2012 at 23:08 #106725
Bill Dawes
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@billdawes
Emma Victoria caught my eye, she looks cute , hope that does not offend any steam loco enthusiasts.

Never been that interested in making a model loco but this one sparked an interest, maybe a future project.

Just one thing (at the moment) puzzles me, are the drawings that appear in the article the only ones, several items are just described, is this sufficient for the experienced loco builder? or am I missing something.

Bill D.
19 December 2012 at 08:02 #106731
David Clark 13
Participant
@davidclark13
Hi Bill

All drawings will be published. We will catch up very shortly.

Emma Victoria is a good beginners engine.

regards David
19 December 2012 at 19:07 #106763
Bill Dawes
Participant
@billdawes
Thanks David, good news.

I've got a staionary engine and boiler on the go at the moment so guess a simple loco is the next challenge.

Regards

Bill
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