new inner bearing loose on shaft

[andy felth]

anyone have ideas as to the topic. ordered kit from hometask and the bearings fit the housing fine but the inner bearing appears to be loose on the shaft. anyone else encounter this problem

[Jerrod Sessler]

Andy-

This is odd.  Hopefully Amy will chime in here.  What is your model number?  What is the bearing number on the bearing that seems to be loose?  It should not have any play in it.  The problems like this are normally disassembly problems where the entire old bearing has not been removed so something looks funny or doesn't fit.

Thanks,
Jerrod

[biguggy]

For both the bearings, inner and outer, the inner race should be a sliding fit on the spider shaft, not a press fit as the outer race is into the bearing housing.

Should you not have fitted the bearings into the housing could you slide the bearing onto the shaft then reach across the outer race and cage with your thumb and forefinger and try and get the inner race to 'wobble' on the shaft. It should not have any discernible 'wobble' but should just, and only just, slide freely on the shaft. 

Should any 'force' be required to get the shaft into  the inner race the bearing will be damaged during assembly.

[david field]

That looks like a Whirlpool spider, is it?

Regardless of the manufacturer I believe .011" is way to much clearance.

Can you measure the internal diameter of the old bearing and the internal diameter of the new bearing? These bearings are normally a standard size with the shafts/housings machined to give the correct 'fit'.

Should the internal diameter of the inner races of the old and new bearings be the same it would appear that the old bearing has become loose on the shaft and worn the shaft in way. This is not unusual. The bearing races are much harder than the shaft and the shaft will 'wear' more than the race.

I am not aware of any good, cost effective way of restoring the shaft to the original dimensions.

The best short term solution I can think of is to hand knurl the portion of the shaft in way of where the bearing sits to such an extent that the required 'sliding fit' is obtained. The major drawback to this, in my opinion, is that in doing that you have no way of controlling the concentricity of the knurled portion of the shaft with the machined section where the outer bearing runs. This would lead, in my opinion, to quite rapid flattening of the knurl with the subsequent  result of the bearing being loose on the shaft again.

Metal spraying of the shaft is also a possibility but I do not see that as being in any way cost effective.

I hope this may be of some help in your decision making but I doubt you will be happy with the conclusion.

Should you have any further questions please post them and I will do my best to respond.

Regards

Biguggy

---

From: andy felth <raf...@yahoo.com>
To: biguggy <big...@yahoo.com>
Sent: Sunday, 27 January 2013, 13:47
Subject: Re: new inner bearing loose on shaft

you are absolutely correct, that is my concern as to how to get the proper diameter on the shaft for a sliding fit.  the outer bearing is a sliding without play fit on the shaft.  the inner bearing however has .011" thousandths and wobbles on the shaft to a large degree whether test fitted on the shaft or with the inner basket assembly inserted into the outer housing.  not sure if you were able to see the picture I sent Jerrod, attached for your convenience.  it shows that the area where the inner bearing rides on the shaft has a smaller diameter the the shaft section above it.  if the shaft was a consistent diameter all the way down then no problem.

---

From: biguggy <big...@yahoo.com>
To: washer...@googlegroups.com
Cc: andy felth <an...@div4scpro.com>
Sent: Sunday, January 27, 2013 3:12 AM
Subject: Re: new inner bearing loose on shaft

[Walter Will]

I have a Whirlpool Duet and the shaft has been worn where the seal is. 

My solution was to fill that in with a bras brazing rod. I tried using a turbo torch, but it just barely got to a high enough temperature to melt the brass rod. I went for my oxyacetylene torch and that works well. It is a mess, and I knew it would be. I am going to take it to a machine shop to turn the shaft to the correct dimension. 

I may need to add some metal to where the large bearing sits. It may just need a tiny bit. I am thinking of just letting molten brass run on that part of the shaft till it covers that section of the shaft all the way around. Then turn it on a metal lathe.

It is terrible that manufacturers do not sell spiders, shafts, or bearings. 

Walter