Memmeddu
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I've just repaired an angle grinder I've sold 2 years ago when working in an ironmongery
Sadly discovered it has been engineered to fail .
That's one of the rare cases I've discovered that on a tool .
Essentially it appears well made robust with good material and other things like heat shrink tubing on the connections which are pretty good .
Dismantling it the first question was how do it takes fresh air .
The switch has an housing mounted on
dovetail ways , this housing provides protection to the switch and the filter capacitor.
The thing is pretty good but it has no clearance between the plastic cover(the handle piece) and the switch thing .
On the opposite side where the air would have space to access ...
No space either...
There's the softstart and speed controller PCB , bulky pieces o plastic with epoxy resin to protect the electronics ,no clearance.
There's also an heatsink on this unit but it's mounted in the wrong direction IMHO
Infact the restricted air flow hits the heatsink and will hardly pass over it .
If it was turned 90 degrees the air would pass easily and on the entire surface of the heatsink itself providing better cooling.
The handle piece has small inlets right where the operator would put the hands , and on the rear there are small inlets .
On the brush holders zone there are 4 small apertures (inside ) to allow the air to pass over the motor .
I see all this design like something engineered to fail .
There's practically no air coming out the grinder when it's switch on .
The wires are thin and brittle,the cables are short and cracked because the tensions and vibrations .
The rotor and stator resins are not well applied on the windings .
On my metabo there's a long flat PCB with the switch and suppression capacitor mounted on it .
Bigger and better insulated wires and 20mm clearance both sides where the air can flow without any restriction
Big air inlets all around where the power cord goes inside the handle
Surely I'm not a fun of the design choosen by AEG for their 1300W angle grinders
What're your thoughts about ?
PS I didn't have time to make any photo
I can't even say the exact model
Sadly discovered it has been engineered to fail .
That's one of the rare cases I've discovered that on a tool .
Essentially it appears well made robust with good material and other things like heat shrink tubing on the connections which are pretty good .
Dismantling it the first question was how do it takes fresh air .
The switch has an housing mounted on
dovetail ways , this housing provides protection to the switch and the filter capacitor.
The thing is pretty good but it has no clearance between the plastic cover(the handle piece) and the switch thing .
On the opposite side where the air would have space to access ...
No space either...
There's the softstart and speed controller PCB , bulky pieces o plastic with epoxy resin to protect the electronics ,no clearance.
There's also an heatsink on this unit but it's mounted in the wrong direction IMHO
Infact the restricted air flow hits the heatsink and will hardly pass over it .
If it was turned 90 degrees the air would pass easily and on the entire surface of the heatsink itself providing better cooling.
The handle piece has small inlets right where the operator would put the hands , and on the rear there are small inlets .
On the brush holders zone there are 4 small apertures (inside ) to allow the air to pass over the motor .
I see all this design like something engineered to fail .
There's practically no air coming out the grinder when it's switch on .
The wires are thin and brittle,the cables are short and cracked because the tensions and vibrations .
The rotor and stator resins are not well applied on the windings .
On my metabo there's a long flat PCB with the switch and suppression capacitor mounted on it .
Bigger and better insulated wires and 20mm clearance both sides where the air can flow without any restriction
Big air inlets all around where the power cord goes inside the handle
Surely I'm not a fun of the design choosen by AEG for their 1300W angle grinders
What're your thoughts about ?
PS I didn't have time to make any photo
I can't even say the exact model
