Re: Black & Decker grass strimmers (GL320) motors overheat fast

> This strimmer's motor has no effective cooling : impeller is made of

> > plastic, fan blades are not angled to force air into motor ( has no vents > > either ), heat will build up in steel rotor shaft & cannot escape, so > > copper coils will melt. When I glued an impeller onto rotor shaft using > > std (OPC) cement , the cement disintegrated into powder when the shaft > > got incredibly hot ( in ambient air of 29°C ) ! My hitachi EM-8 mower' > > s motor's cooling is good : motor doesn't heat up @ all, rotor shaft is > > always cool. > > My mum bought a new strimmer after each strimmer's motor's coil > > melted, 4 strimmers in total. After 3 motors' coils melted, 1 rewinder ( > > electrician ) told me not to let these motors heat up. > > Impeller should be made of metal ( preferably aluminium alloy ) so > > heat can escape from motor's shaft, fan blades should be angled to force > > air into motor, vents should exist to let out heated air. Electric cable > > attached was oversized ( 6 amp capable at least ) & overweight, just 2 > > amp cable will suffice ( spec says 240v, 1.2A, 240w ) > > I advise others to chk out alternatives 1st, before buying these stupid > > strimmers ( overweight & overheat ). > > The fan is the centrifugal type, but that does not explain a lack of vents. > I don't think a 2 amp cord is standard issue for appliances of that type. > > I have a Black & Decker Hedge trimmer. The power switch made contact only at > the very bottom of it's throw, making it difficult to keep it running. I had > to take it apart and install a spacer under the switch rocker. > > Others have complained about B&D drills overheating. > > Even Chicago Electric equipment, made in China and sold dirt cheap at Harbor > Freight is better quality than B&D consumer stuff. > > Dave M. > > > >

String trimmer motors make a decent cieling fan when run off a solar panel.

Reply to
Beecrofter
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now that's interesting Beecrofter.........................

Reply to
madgardener

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