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Difference between nikasil and steel linears

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cb1rocket
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Joined: 30 Jan 2010
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PostPosted: 12:50 - 11 May 2012    Post subject: Difference between nikasil and steel linears Reply with quote
Is there a picture showing the obvious difference between the two?

How would one go about knowing what to look for?
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Teflon-Mike
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Joined: 01 Jun 2010
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PostPosted: 15:05 - 11 May 2012    Post subject: Re: Difference between nikasil and steel linears Reply with quote
cb1rocket wrote:
Is there a picture showing the obvious difference between the two?

How would one go about knowing what to look for?


Steel liner is steel, a slight dull blue-grey colour and usually cross-hatched in the honing marks.

Nikasil, is a Hard Chrome plating. It will be a lot shinier, and more silvery.

Look at the 'hard Chrome' on your forks, THAT is more like what Nikasil will look like.

Look at a bearing, from an engine or wheel, or better still a soft white metal bearing from a big-end cap; THAT is more like what a steel liner will look like.

You may also tell from the top of the barel. Nikcasil chrome is often applied direct to the aluminium of the barel. Steel liner will be a thick tube of steel shrunk into the ali, so you ought to see the actual material boundry in distinct concentric circles around teh bore... but not always, sometimes barels have nikasil chromed steel liners.
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Kickstart
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Joined: 04 Feb 2002
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PostPosted: 17:16 - 11 May 2012    Post subject: Reply with quote
Hi

Nikasil will still be fairly dull. Needs the same style of hatched finish to hold the oil and stop it seizing.

However the easiest way to see is to look at the top and bottom of the barrel. A liner should be obvious.

All the best

Keith
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Pete.
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Joined: 22 Aug 2006
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PostPosted: 20:05 - 11 May 2012    Post subject: Reply with quote
Use a magnet. If it sticks - steel/iron, if it doesn't - aluminium ally & nikasil plating.
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cb1rocket
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Joined: 30 Jan 2010
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PostPosted: 21:08 - 11 May 2012    Post subject: Reply with quote
Brill, thanks guys, the last one sounds good about the magnet use. Of course as Keith says it could still be a steel linear underneath! And thanks Tef!

Cheers for the tips!
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