[ARC5] BC-348 DYNAMOTOR

[Mike Hanz]

Ah! Good point...if the brush caps are stuck, then a non-burring method 
of removal is needed.  A collet is the best method, but failing that, 
you can back down the list of cylindrical workpiece holders - a six jaw 
chuck, then a four jaw chuck, then a three jaw (common with most 
electric drills.)  By the time you get to a three jaw chuck or a pair of 
pliers with a roughly round shape in the jaws, you'll need some serious 
padding to keep from scratching the knurled pattern on the brush caps.  
Cardboard is useful in this situation.  Let us know how it turns out, John!

 - Mike

J Forster wrote:

>Apparently the caps are stuck.
>
>You make a good point though. The brushes could well be stuck w/in the
>holders and pushing them a bit w/ an orange stick or equal may free them.
>
>Mike Hanz wrote:
>
>>They are most likely simply stuck because of corrosion between the
>>carbon brush and brass sleeve, John.  It's a common condition.  If you
>>can reach the brushes where they contact the armature, just push them
>>gently in in both the x and y axis with a wood dowel or other soft
>>material while pulling gently on the wire out of the back of the brush.
>>They usually pop loose with some gentle nudging.  Just try not to gouge
>>the soft copper of the commutator in your efforts.
>>
>>WB9NWN wrote:
>>
>>> AM TRYING TO CHANGE THE BRUSHES IN MY DM-28
>>>DYNAMOTOR. I CANNOT REMOVE THE OLD BRUSHES! ANY HELP FROM ANYONE?
>>>