| Author |
Message |
    
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 928
Registered: 07-2002
| | Posted on Saturday, June 14, 2014 - 06:53 pm: | 
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These patterns are just about finished, the wood was glued together with newspaper between them, they should split to place them on a board. The straps were pretty easy so I made two of them, reduces the cost. The pumps will fit a 2 1/2 hp Lockwood Ash, the straps fit the 2 1/2 and 6.  |
terry_harper
New member
Username: terry_harper
Post Number: 1
Registered: 12-2010
| | Posted on Saturday, June 14, 2014 - 08:41 pm: |
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The patterns look great! Can't wait to see the finished castings. The paper trick works wonders. I use the brown wrapping paper which works very well. |
richarddurgee
Senior Member
Username: richarddurgee
Post Number: 3333
Registered: 11-2001
| | Posted on Saturday, June 14, 2014 - 08:53 pm: |
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*
J.B.
Pieces look Great !
Do they have to be oversized to compensate
for shrinkage when cast ?
* |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 929
Registered: 07-2002
| | Posted on Sunday, June 15, 2014 - 07:14 am: |
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Thanks. I figure one percent shrinkage for cast iron, two percent for brass. Cast iron comes to about 1/8" per foot, so on small patterns like this it's not critical, when using old parts for a pattern you build up the machined areas, this helps to compensate. |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 932
Registered: 07-2002
| | Posted on Wednesday, June 18, 2014 - 10:06 pm: |
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I split the pump tonight, went as planned.
 |
marion
Member
Username: marion
Post Number: 6
Registered: 03-2013
| | Posted on Saturday, June 21, 2014 - 10:24 am: |
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An example of great craftsmanship. |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 934
Registered: 07-2002
| | Posted on Monday, June 30, 2014 - 01:41 pm: |
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The core box is about finished, came out OK.
 |
rbprice
Senior Member
Username: rbprice
Post Number: 462
Registered: 11-2001
| | Posted on Sunday, July 13, 2014 - 08:08 pm: |
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What do you for a binder in the cores JB? |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 936
Registered: 07-2002
| | Posted on Sunday, July 13, 2014 - 11:00 pm: |
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Bob, what you're looking at is a "core stick", a positive of the core. It's made of dowel rods. The core box is formed by pouring Replicate, a two part plastic, around it, one half at a time. It has to be coated with a release agent and removed at the correct time or it's in there forever. The foundry will make the cores using this box. |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 1067
Registered: 07-2002
| | Posted on Tuesday, June 02, 2015 - 06:32 am: |
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I got the sample runs back from the foundry, they look good, cores are all well centered, after machining I'll place an order. The pump fits a 2-1/2hp Lockwood Ash-Nadler, the straps fit 2-1/2 &6hp. The bearing shells are experimental, going to machine and Babbitt line them for the 8hp engines, We've had some bearing failures on these engines, trying to make something more durable.
 |
rbprice
Senior Member
Username: rbprice
Post Number: 516
Registered: 11-2001
| | Posted on Tuesday, June 02, 2015 - 08:04 am: |
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What bronze alloy did they use JB? |
billschaller
Senior Member
Username: billschaller
Post Number: 622
Registered: 12-2003
| | Posted on Tuesday, June 02, 2015 - 08:14 am: |
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Wasn't the original a belt drive?
Or thermo siphon?
 |
david_doyle
Advanced Member
Username: david_doyle
Post Number: 36
Registered: 03-2013
| | Posted on Tuesday, June 02, 2015 - 12:30 pm: |
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really appreciate your sharing this process. I very keen to see the rest of the process of building the pump. check valves etc. |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 1068
Registered: 07-2002
| | Posted on Tuesday, June 02, 2015 - 01:35 pm: |
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If anyone needs pumps, straps, or eccentrics let me know, would like to have them all cast at once.
Bob, the material is leaded bronze, excellent machine ability, good color.
Bill, that pump is an add on, L-A always yused a piston pump. |
billschaller
Senior Member
Username: billschaller
Post Number: 623
Registered: 12-2003
| | Posted on Tuesday, June 02, 2015 - 04:22 pm: |
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J.B. thanks to you, some day there will be a number of running engines up near 10,000 lakes. I certainly need at least two pumps, maybe more. |
david_doyle
Advanced Member
Username: david_doyle
Post Number: 37
Registered: 03-2013
| | Posted on Tuesday, June 02, 2015 - 05:10 pm: |
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yeah rare opportunity here. Email sent. |
