Wood bearings... is this a joke? - Snowblower Forum : Snow Blower Forums
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post #1 of 14 Old 09-14-2014, 09:35 PM Thread Starter
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Wood bearings... is this a joke?

Wood bearings... is this a joke?



They don't even look like hardwood!

Pete
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post #2 of 14 Old 09-14-2014, 09:37 PM
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I don't see many sales for those

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post #3 of 14 Old 09-15-2014, 12:45 AM
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Could be a joke, but then again...?

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MTD....2 stage(modern 8.5 HP) not my favorite
Honda HS622 TA-B - acquired at an auction- nice machine for it's size.
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post #4 of 14 Old 09-15-2014, 06:40 AM
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that should have been posted in ideas on this 1.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #5 of 14 Old 09-15-2014, 07:35 AM
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What a ridiculous price also, $29 for 2! Now thats pure profit.




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post #6 of 14 Old 09-15-2014, 08:51 AM
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I saw an old wall clock with wooden bearings, and they used to use wooden bearings on the propeller shafts on large ships, water lubricated. The wood was lignum viatie. I am not sure on the spelling.
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post #7 of 14 Old 09-15-2014, 11:01 AM
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Quote:
Originally Posted by Sid View Post
I saw an old wall clock with wooden bearings, and they used to use wooden bearings on the propeller shafts on large ships, water lubricated. The wood was lignum viatie. I am not sure on the spelling.
Sid
Interesting.

Quote:
Master clockmaker John Harrison used lignum vitae in the bearings and gears of his pendulum clocks and his first three marine chronometers (all of which were large clocks rather than watches), since the wood is self-lubricating. The use of lignum vitae eliminates the need for horological lubricating oil; 18th-century horological oil would get gummy and reduce the accuracy of a timepiece under unfavourable conditions (including those that prevail at sea).

For the same reason it was widely used in water-lubricated shaft bearings for ships and hydro-electric power plants,[4] and in the stern-tube bearings of ship propellers [5] until the 1960s saw the introduction of sealed white metal bearings. According to the San Francisco Maritime National Park Association website, the shaft bearings on the WWII submarine USS Pampanito (SS-383) were made of this wood.[6] The aft main shaft strut bearings for USS Nautilus (SSN-571), the world's first nuclear-powered submarine, were composed of this wood. Also, the bearings in the original 1920s turbines of the Conowingo hydroelectric plant on the lower Susquehanna River were made from lignum vitae. The shaft bearings on the horizontal turbines at the Pointe du Bois generating station in Manitoba are made from lignum vitae.
Lignum vitae - Wikipedia, the free encyclopedia

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post #8 of 14 Old 09-15-2014, 12:27 PM
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Garage
I guess that is one way to make money off of your scrap wood pile.
They look like maple. Soak 'um in oil first before use.
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post #9 of 14 Old 09-15-2014, 05:01 PM
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There use to be a company in Worcester, MA that made hard wood bearings. I can't recall their name. I never used them(don't know of anyone who did) but I remember their catalog in an engineering library a few years ago. I can only see someone using them now on restoring antique equipment..... or something that is very low speed and low load.

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post #10 of 14 Old 09-15-2014, 10:38 PM Thread Starter
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Okay, so I'm not alone. I have asked the seller. This ought to be good!
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