BMW K bikes (Bricks)

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roys

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Hi,

Unfortunately both splines are bad meaning driveshaft and rear drive need to be replaced with new or refurbished. However, new are quit expensive (plus shipping plus customs) while shipping an exchange part from Israel to USA or europe as part of getting a refurbished part is nearly as expensive.

I might have a cheaper path but would realy appreciate hearing the wisdom of those more experienced then me - so I appreciate everyones opinion.

I have met a very nice man here who is a toolmaker and a biker (80's moto guzzi and 80's Hondas) that says that he can rebuild both splines - that he has done this in the past for OTHER machinery. BTW - I think he is bored as he woke me and my wife at 05:30AM telling me that he has been dreaming of this all night and he knows EXACTLY how to do it now... and I must bring him parts "immidiately". Basicaly he just wants to be paid for materials (he works in BIG org and seems to be under employed).

As to the male spline he says there is a technique for ADDING material and then machining it down to specs. and that the added on meterial is at least as strong as original.

Q1: has any one heard of such a thing?

As to the female spline on drive shaft he says that he can create same, cut off bad one and weld back his creation.

Q2: Does this sounds similar to what the shops in USA (like Bruno) or europe do?
Q3: It would be better if I could buy that replacment piece and give him to weld on - has anyone done this?

Q4: has any one technical drawings of the splines "profile"? or at least good measurments of the hight, width at bottom and width at top of a tooth? I think given that there are 20 in full circle one can derive the other numbers and angles.

Sorry this is so long but I am having a hard time making up my mind, buying would be simpler but cost plus shipping plus customs (###!^^) will be realy expensive.

Thank you very much for making it all the way down here Smile
Roy

PS I need to make up my mind fast.

    

scottiesharpe

scottiesharpe
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I know very little about such things, but I would suggest to you that a driveshaft is a rotating part and must be balanced perfectly or you will have vibrations and that may cause more damage.

He will have to be pretty good at what he does in order to make that part.

    

roys

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@scottiesharpe wrote:I know very little about such things, but I would suggest to you that a driveshaft is a rotating part and must be balanced perfectly or you will have vibrations and that may cause more damage.

He will have to be pretty good at what he does in order to make that part.

hi,

thankfully i am past this. have bought new drive shaft from motobins and used bevelbox from motorworks, both assembelled in bike and bike rund very well.

tnx
Roy

    

the mule

the mule
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roy

I used to be a toolmaker/fitter-machinist many years ago and remember the technique of metal spraying to build up a machined surface if it was undersize. The end result was that the shaft once treated was in fact stronger than the original shaft so this process does exist.
As to the second question re angles etc for the splines all that is required is the outer and inner diameter and number of teeth. the shape of the teeth is generally a standard and the cutters will shape the teeth profile (angles) correctly and accurately with the use of an indexing head. Hope this helps you

https://s5.photobucket.com/albums/y156/the_mule/
    

roys

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Hi,

thank u very much for the info - it is very interesting. As u know i opted for the more simple solution of replacing the parts. and I will CERTAINLY keep these well maintained as this is an expense I do not want to repeat.

ATB
Roy

@the mule wrote:roy

I used to be a toolmaker/fitter-machinist many years ago and remember the technique of metal spraying to build up a machined surface if it was undersize. The end result was that the shaft once treated was in fact stronger than the original shaft so this process does exist.
As to the second question re angles etc for the splines all that is required is the outer and inner diameter and number of teeth. the shape of the teeth is generally a standard and the cutters will shape the teeth profile (angles) correctly and accurately with the use of an indexing head. Hope this helps you

    

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