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<div style="font-size: 10pt;"><div dir="ltr" style="margin-top:0;margin-bottom:0;">Heat is the enemy of these motors. The main cause of excessive heat is bearing drag. And you have to use good quality bearings to get any good life out of them. When they get noisy, they need a rebuild. You can't wait for them to fail.</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div><div id="LGEmailSignatureBox" dir="ltr" style="margin-top:0;margin-bottom:0;"><div dir="ltr" style="margin-top:0;margin-bottom:0;font-size:9pt;"><i>Sent from my T-Mobile 4G LTE device</i></div></div></div><div style="font-size: 10pt;"><div id="LGEmailHeader" dir="ltr" style="margin-top:0;margin-bottom:0;"><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div><div dir="ltr" style="margin-top:0;margin-bottom:0;">------ Original message------</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>From: </b>Chris Zach<cz@alembic.crystel.com></cz@alembic.crystel.com></div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Date: </b>Tue, Jun 12, 2018 7:21 PM</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>To: </b><a href="mailto:elec-trak@cosmos.phy.tufts.edu">elec-trak@cosmos.phy.tufts.edu</a>;</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Cc: </b></div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><b>Subject:</b>(ET) Another mower motor blows.</div><div dir="ltr" style="margin-top:0;margin-bottom:0;"><br></div></div><pre>Well, had the usual deck motor failure. This seems to happen every other year or so with tall thin motors:Mows fine one <a href="http://weekend.St">weekend.St</a>art mower next weekend, tractor pulls huge amount of current. Blade is stopped.Blade free-wheels, wiring to motor is smoked.Take motor top off, commutator is burned, and armature is obviously shorted. Motor <a href="http://destroyed.An">destroyed.An</a>y idea why this happens? The inside of the motor was dry, no problems, plenty of brush. It's as if the laminates just decide to fail and burn everything <a href="http://up.No">up.No</a>w to buy some more motors, my supply is low. This never happens to fat motors, they just have the magnets deglue and shatter all along the inside. Once again no reason, is there a glue that will hold them?C_______________________________________________Elec-trak mailing<a href="mailto: listElec-trak@cosmos.phy.tufts.eduhtt"> listElec-trak@cosmos.phy.tufts.eduhtt</a>ps://<a href="http://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak">cosmos.phy.tufts.edu/mailman/listinfo/elec-trak</a></pre></div>
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