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Fiber change gears

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Lee Reynolds 117/07/2020 10:39:05
5 forum posts
2 photos

Hi,

When I get it up and running I will have a change gear set on my Harrison M300 that will comprise a combination of metal, fiber and Delrin gears.

Do I lubricate the set, and if I do, what do you more experienced machinists suggest I use.

I seem to remember reading somewhere that nylon should not be lubricated, is Delrin the same?

Regards,

Lee

Andrew Johnston17/07/2020 10:56:08
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5670 forum posts
656 photos

My M300 has the original steel and Tufnol change gears. I give them an occasional squirt with ISO68 slideway oil as per the manual.

Andrew

Ronald Morrison17/07/2020 11:14:09
35 forum posts

Delrin should not need lubrication buy shouldn't be harmed by lubrication either.

Circlip17/07/2020 11:41:31
1198 forum posts

Nylon absorbs water and even the "Low" absobtion rated Nylon 6 or 6-6 does to a lesser extent. Tufnol should not be lubricated, it's a layered material.

Regards Ian.

Swarf, Mostly!17/07/2020 12:05:35
544 forum posts
47 photos
Posted by Circlip on 17/07/2020 11:41:31:

Nylon absorbs water and even the "Low" absobtion rated Nylon 6 or 6-6 does to a lesser extent. Tufnol should not be lubricated, it's a layered material.

Regards Ian.

Hi there, Ian,

Are you suggesting possible delamination?

Best regards,

Swarf, Mostly!

not done it yet17/07/2020 12:05:52
5031 forum posts
20 photos
Posted by Andrew Johnston on 17/07/2020 10:56:08:

My M300 has the original steel and Tufnol change gears. I give them an occasional squirt with ISO68 slideway oil as per the manual.

Andrew

Exactly this. As per page 8 of the user manual. Or rather ‘daily’, perhaps?

john halfpenny17/07/2020 12:08:15
57 forum posts
10 photos

Henry Ford used layered tufnol for camshaft gears on millions of cars. Later he used macerated tufnol, and later still a type of nylon. No problems from engine oil.

Nicholas Wheeler 117/07/2020 12:23:20
396 forum posts
22 photos
Posted by john halfpenny on 17/07/2020 12:08:15:

Henry Ford used layered tufnol for camshaft gears on millions of cars. Later he used macerated tufnol, and later still a type of nylon. No problems from engine oil.

Although the nylon teeth on V6 cam gears are a notorious week point.......

Lee Reynolds 117/07/2020 13:09:12
5 forum posts
2 photos

Sorry Gentlemen it,s the fiber gear I am more concerned about. It came from 600 group as it was an original gear but missing from my S/H machine.

For the price I expected a metal one....silly me! and then the lubrication advice in the manual would make sense and be followed.

Lee

Michael Gilligan17/07/2020 13:20:08
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16411 forum posts
715 photos

Posted by Circlip on 17/07/2020 11:41:31:

[…]

Tufnol should not be lubricated, it's a layered material.

.

dont know

Certain grades of Tufnol are used for propeller shaft bearings ... totally immersed in, and lubricated by, water.

MichaelG.

.

A little light reading: http://ahistoryoftufnol.org/whatistufnol/

and ... https://www.tufnol.com/technical/technical_materials.aspx

 

Edited By Michael Gilligan on 17/07/2020 13:30:35

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