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10-06-2014, 06:08 PM | #21 |
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Re: Curious, why is good to store a crank standing on end?
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10-06-2014, 08:00 PM | #22 |
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Re: Curious, why is good to store a crank standing on end?
I'm not a Navy guy, but I understand the big ships have to keep their prop shafts in slow motion while in Port to keep from shaft warp.
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10-06-2014, 09:19 PM | #23 |
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Re: Curious, why is good to store a crank standing on end?
I suspect this crankshaft "plastic deformation" issue is not something to worry about. If a crankshaft is that "soft", then how could it withstand the stresses exerted by the combustion process, like when lugging the engine down under load?
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10-06-2014, 09:31 PM | #24 |
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Re: Curious, why is good to store a crank standing on end?
I have a 4" Merc crank that is one of "x" remaining in the world. It cost me $200 and is worn but can be ground one more time. Should I store it on end or on its side?
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10-06-2014, 09:55 PM | #25 |
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Re: Curious, why is good to store a crank standing on end?
If someone wants to store a crank horizontally build a wooden box and fill it with dry sand. Lay the crank onto the sand and push it down until it is settled.
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10-06-2014, 10:11 PM | #26 |
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Re: Curious, why is good to store a crank standing on end?
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10-06-2014, 11:28 PM | #27 |
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Re: Curious, why is good to store a crank standing on end?
I used to store my cranks in a flaged hanger until I bumped one somehow and the oil slinger that separates the rear main and the rear seal busted, I sold the flange sliding type and built the wooden one , It's harder for me to mess it up. only problem is all shafts aren't the same length, so I slide a piece of p.v.c pipe over the shorter ones' snout to keep it from falling off the rack. I 'll find an eight year old and have them post a picture of mine and a dimentional drawing , I like the wood so it can't damage
the metal shafts, and for a small one person shop it's suitable for me. Fordestes, |
10-07-2014, 01:55 AM | #28 | |
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Re: Curious, why is good to store a crank standing on end?
Quote:
I'm an old Navy Machinists mate, pretty sure I know the answer to this one. |
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10-07-2014, 04:37 PM | #29 |
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Re: Curious, why is good to store a crank standing on end?
I have two cranks stored like the pic. One is a 4" merc & the other is a 3 3/4" from a 47 truck. The V has the old bearings for support & the base has casters so that I can move them around easily. Best I can remember I got the idea from a book by Frank Oddo on building a V/8 engine. I keep them covered with a oily rag to keep the dust off. No rust here in the hi-dez. YET??
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10-08-2014, 05:13 AM | #30 |
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Re: Curious, why is good to store a crank standing on end?
Do we realize just how precise those boxed "V-Blocks" would need to be sized and aligned in order to provide a "straight-line" support at the 3 mains?????? Like within one thousands of an inch--- If your purpose is protection from dirt or rust that is good. Otherwise a waste of time.
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10-08-2014, 09:29 AM | #31 |
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Re: Curious, why is good to store a crank standing on end?
Well I cut them all held together & used a straight edge & they seem to line up good enough for me. I didn't use a feeler gauge for clearance tho. I'll take my chances as opposed to storing on end & have one fall over.
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10-10-2014, 07:00 PM | #32 |
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Re: Curious, why is good to store a crank standing on end?
I am about to remove my crankshaft from my 59ab and this is what I was thinking of storing it on.
Does it also need support in the middle? And I will also cover metal supports with soft material so I don't damage the mains. Last edited by Macdozer; 10-10-2014 at 07:22 PM. |
10-10-2014, 07:03 PM | #33 |
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Re: Curious, why is good to store a crank standing on end?
Does it also need support need middle? YEP
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10-10-2014, 08:13 PM | #34 |
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Re: Curious, why is good to store a crank standing on end?
I will probably cut a piece of wood to support the middle main. How long can I leave it like this.
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10-11-2014, 08:16 AM | #35 |
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Re: Curious, why is good to store a crank standing on end?
All metals have an ability to creep which is a phenomenon similar to the overhead fan blades (which are not metal) on that ceiling fan on your outdoor porch. It is an understood variable in the calculations used during the design of a part. All materials such as metal, wood, plastic and even glass have an ability to creep but that ability varies and is more dependent on elevated temperature then he dead weight of the part we are talking about. The contribution to failure in a part like a crank from creep is negligible. The ability to keep stock in storage and for work flow requirements during the manufacture or rebuilding these engines has to be the primary reason for vertical storage. Self deformation from creep is too far down the list to consider.
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10-11-2014, 07:43 PM | #36 |
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Re: Curious, why is good to store a crank standing on end?
I would think that if laying a crank on it side unsupported would cause one to bend, that standing one on the flywheel end would cause it to bend at the rod throw closest to end it is standing on. I wouldn't be concerned about bending, I would be more interested in storage to protect them from damage.
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10-11-2014, 08:20 PM | #37 |
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Re: Curious, why is good to store a crank standing on end?
I have a couple of them also I think I will store them in the refrigerator so they stay cool, do you think I,am correct?
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10-11-2014, 08:51 PM | #38 |
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Re: Curious, why is good to store a crank standing on end?
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10-11-2014, 09:34 PM | #39 |
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Re: Curious, why is good to store a crank standing on end?
So if we leave a crank laying on its side for long enough it will eventually resemble a 6x2 flat bar stock??
Storing on end is very convenient for space and to pick one out. |
10-12-2014, 06:28 AM | #40 |
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Re: Curious, why is good to store a crank standing on end?
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