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Topic: Dull serger blades, now what do I do?  (Read 5001 times)
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Ashling
« on: March 27, 2009 08:00:58 AM »

I've been working on a rather serger intensive project the last few weeks, and now my blade no longer cuts.  I know I can get a new one through Kenmore, but what I want to know is whether or not I need to replace both the upper and lower blades, or if replacing just the upper will work.  The lower blade costs almost twice as much as the upper, so if I can put off replacing that, it would be nice.  Or, is it possible to sharpen them?  Thanks.
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Sew-Classic
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« Reply #1 on: March 27, 2009 10:14:26 AM »

The lower blade is carbide steel (harder) and the upper blade is a softer steel.  They do this so that the upper blade will take the brunt of the wear.  Start by just replacing the upper blade.
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Ashling
« Reply #2 on: March 27, 2009 10:24:46 AM »

Thanks, I'll try that first.  Smiley
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« Reply #3 on: March 27, 2009 10:31:48 AM »

the repair tech where I got my serger indicated that trying to sharpen serger blades is not effective and can cause more problems.... definitely replace them. and yes, you can just change the top... about 2-3 tops per bottom blade is average.
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purefairydust
« Reply #4 on: March 29, 2009 02:43:44 PM »

Don't forget to look in the notions box that came with your serger, it might have an extra blade in there. I know on the sergers I have bought in the past had an extra blade and extra needles in the notion box. This saved me from have to run out and buy one in the middle of a project and gave me time to catch them on sale.
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« Reply #5 on: April 10, 2009 10:01:29 AM »

It is possible to sharpen some blades.  Both of mine got nicked up and I ordered new ones.  Even though it said it would fit my machine (Baby Lock BL3-418), when they came in, neither one fit.  My repair guy was able to sharpen my old ones nicely and I was back on the road again! 
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