Old Sandvik Spot Welded Roll Top bars

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tazz001

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I bought a 10 pack of these 22inch reasonable delivered, when they arrived I noticed they seem very old spot weld contruction, non replacable, greasable tip..

Do you think they will hold up on a higher speed modern saws (jonsesred 2171) or will they fry since they probably had intended chain speed quite slower?

My first encounter with such old bars & debating on even getting chains if the roller tip will fry fast..

Thanks, someone here must have a couple years on me that may have used these bars :)

part number is 1778-63 also marked 80a in another location which may be year of manufacture?
 
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