rewinding a rotor

[polecat]

ok you clever lot how hard is it to rewind a rotor from a bosch chainsaw mines just gone i've been looking into it as you do i'm still trying to get my head around it anybody do rotor rewinding
thanks polecat

[lordedmond]

do you mean an armature with a com. on it

its not hard I spent a year during my apprenticeship in the winding dept.

the hard part is getting the insulating materials in the small quantities you will need , the there is the stoving varnish and a oven to bake it in ( do NOT use a domestic oven if you want domestic bliss )

you would need to determine whether it is lap or wave wound , coil pitch , turns and gauge of wire

you will run into problems with the com. as most are wire welded not soldered


as I said the winding is not hard its obtaining the materials to do the job


I have done up to 100hp dc and 200hp ac motors up to 3kv and ac 200hz 128 volt high speed grinder stators

Stuart

[DMIOM]

Hi Polecat,
not sure what part of the world you're in?

If you're in the UK I can most heartily recommend asking "Fulmak Rewinding" in Nottingham.

I've had a number of jobs done by Fulmak over the years, and they're extremely helpful. I've had a couple of different motors rewound, and where I had an anonymous DC servo (which someone had retrofitted to a mill) which had magnetic issues, Ian sourced a replacement Baldor and had it modified to fit by his local engineering contractor - one Stevenson Engineering (of high renown too!), who have also done a splendid job.

  Fulmak Rewinding
  236 Bennett Street,  Long Eaton, Nottingham NG10 4HH, United Kingdom
  0115 973 3216

(usual disclaimer - no connection but just a very satisfied customer)

Dave

[polecat]

iam sure they call it a rotor anyway it's off a brushed bosch electric chainsaw looked up the wire it's only a fiver need to do a bit more research about it i fancy a go after all it cant get anymore broken than it is now i've taken photoes before i start i will phone to get a price to rewind it profesionally that will confirm whether i do it or send it away thanks to all on this cracking forum i do alot of lurking in the background and marvel at what you guy's can make
polecat

[Noitoen]

This is not a task for a beginner. The rpm's involved require a careful rewinding job and if not done right, it will be destroyed in minutes. If Bosch no longer supply a spare part you should give it to some professional to do it. After rewind they balance it again and will be (almost) as good as new.

[polecat]

iam aware of the balencing issues i used to balence my own wheels on a zx9r 142 hp and a top speed of 175 mph still researching how to do it but some of the utube video's it looks do-able to me
thanks polecat