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series-hybrid t1_isa7ts5 wrote

wrap a wet cloth near the cut to wick heat away, on both sides of the cut. A thin abrasive disc in an angle-grinder is exactly the tool. Stop often to let it cool.

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MmmPeopleBacon t1_isa8c7d wrote

This is the most correct answer

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series-hybrid t1_isa8x25 wrote

Thanks!

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paulmarchant t1_isaaqe5 wrote

Also, cover the bit of the rail you want to keep to avoid surface finish damage from hot sparks. Tape is fine, aluminium foil is fine.

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Buchaven t1_isb1329 wrote

One last addition? Don’t forget to deburr! Trying to slide a bearing or bushing onto the home cut end could be problematic. Once the cut is finished, use the grinder to put a SMALL chamfer on the end so you guarantee you don’t have any burrs sticking out past the original outer profile.

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series-hybrid t1_isb3ghq wrote

Well done! No circumcision is complete until the deburring is done.

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Lightingcap t1_iscd79u wrote

Jumping on to the top comment to add: make sure you wear a face shield AND safety glasses. And be very careful you don’t skew the blade to one side or the other. Thin cutoff wheels will shatter.

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