S28-400 Magmotor

[craig_colliass]

Hi i am looking for a pair of magmotors to pep things up a bit with Saint Hammer if any one has any for sale please let me know.

[big_nipper]

With our experiance with the mag S28-400s I would advise sticking with the bosch 750s. Other than a weight/size advantage power is about the same unless you want to risk burning them out. They are also not as robust without a lot of modifications. The C40-300 might be better for you. You will have to ask someone who has used these before as we have not but they are heavy.

[craig_colliass]

Hi Mark
I thought the Mag 400 motors were much more powerful than the Bosch units.
How much power do the Bosch motors give out @24volts?
I was told the Mag units were about 4.5 horsepower!
Thanks for your input Mark, I may not bother then.

[maddox]

Magmotor is overly optimistic of the capacity of its motors.

The difference is a tad more power on 24V than a Bosch, for a lot higher pricetag.
But a Bosch 750, with the known upgrades like welding the front plate, magnet retaining setup and capacitators on the brushes does a great job on 36V 75A. More than 75A is just diminishing return on torque/efficiency.

[widow_twanky]

Mario,

Is the magnet retaining set up a relatively simple procedure?

Andy

[beast]

yes Andy it is

[widow_twanky]

OK, let me ask the questions I shouldve asked in the first place.

What parts do I need to do it and can someone either post on how to do it or show me on Saturday?

Hydra has a bit of a problem with one of the motors sticking occassionally and it seems to be around the brushes/magnets etc.

I dont think the front plate is welded on Hydra as it has some m8 rods clamping it in place which does the same thing so I probably need to take out a motor and have a look if the magnets are retained.

Andy

[woody]

Lets see...... is it still there?

Yup!

http://www.technobots.co.uk/Technical/Guidance/BoschMagMod.htmhttp://www.technobots.co.uk/Technica...oschMagMod.htm

(Message edited by woody on October 23, 200

[big_nipper]

In theroy the S28-400 mag motors do have more power, but they are smaller in size so get hot quickly, without cooling they will overheat if run at power levels much more than a bosch. Dont get me wrong they are good motors for their size and weight but I dont think you would gain any advantage in St Hammer from them. Also stalling these motors is a very bad idea, they will literally last a few seconds without a reasonable current limit, boschs are much more forgiving and for large wheels I suspect they will be stalled quite oftern.

[craig_colliass]

Thanks Mark

I think I will stick with the Bosch units then.
Hope to see you guys at a show soon.