[Collins] {Collins} KWS-1 Blower motor bearings

Sat Mar 22 08:26:27 EDT 2014

Try searching for "bearing splitter" instead of puller.  eBay item # 271373761062 is what I used to replace the bearings on the KWT-6 blower motor.  Worked well.
Jim

________________________________
 From: Dr. Gerald N. Johnson <geraldj at netins.net>
To: collins at mailman.qth.net 
Sent: Friday, March 21, 2014 11:18 PM
Subject: Re: [Collins] {Collins} KWS-1 Blower motor bearings

That puller is way too big and made for pulling a sleeve bearing from a 
car engine flywheel. Its not made for pulling a ball bearing of any kind.

www.ebay.com/itm/Bearing-Puller-Kirby-Vacuum-and-small-motors-T127-A-/171163789631?pt=US_Vacuum&hash=item27da28293f
would be more like the right size, but its too short for the KWS-1 fan 
motor shaft. But with a bit of aluminum and steel bars it wouldn't be 
hard to make something like it.

www.ebay.com/itm/Micro-Bearing-Extractor-Puller-Tool-Set-Kit-19-45mm-Deep-Version-BGS-/251457627375?pt=LH_DefaultDomain_0&hash=item3a8c0ae4ef
might be small enough but is pricey.

Some of these are closer to the right size:
www.ebay.com/bhp/motor-gear-puller

Here's a way to make a bearing puller, just needs to be adjusted to fit 
the KWS-1 motor dimensions.
www.instructables.com/id/Cheap-and-Simple-Gear-Puller/

Then this one from Micro Mark might be right, but I didn't get a picture:
www.micromark.com/miniature-gear-and-wheel-puller-9and32-inch-9and16-inch-capacity,8011.html

And there's this concept welded together from button head bolts that 
could be constructed from one steel bar and three button head bolts with 
enough length to reach each bearing. Just needs three tapped holes in 
the cross bar.
makezine.com/2011/02/22/homebrewed-gear-puller/

Google miniature gear puller for another few thousand ideas.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 3/21/2014 3:01 PM, Bill Riches wrote:
> Hi Jerry - I dont think so.  It looks like the Jaws face inward instead of
> outward.  You don't want to take any chances in buggering up the rotor.  I
> would take it to a motor - starter repair shop and they could pull the
> bearings off with the correct tool. You may have trouble separating the two
> halves - the little rivets that hold the label are causing binding.  When
> you pull it apart trim them flush on the inside and the whole mess will go
> together ok.  Use a magic marker to mark stuff you take apart - that way you
> can line up halves.  Be careful of the motor wires - feed them under the
> bracket before pulling halves apart.  Good luck.  Oh - the ring on the
> blower end that is fastened with 4 screws is also glued on.  Use a heat gun
> to heat up the ring after removing the screws and once you start a small
> screw driver under one edge it will pop off.  It must be real hot - be
> careful.
>
> 73,
>
> Bill
>
> -----Original Message-----
> From: Jerry [mailto:jsternmd at att.net]
> Sent: Friday, March 21, 2014 1:13 PM
> To: 'billriches'
> Subject: RE: {Collins} KWS-1 Blower motor bearings
>
> Hi Bill
>
> I really need to do the same to my KWS-1.  Do you think this inexpensive
> puller is large enough to do the job of pulling off the old bearings?
>
> http://www.ebay.com/itm/3-Jaw-Pilot-Bearing-Puller-Small-Bearing-Motor-Pulle
> r-Gas-Engine-Hand-Gear-Pull-/231098557761?pt=US_Hand_Tools&hash=item35ce8c25
> 41
>
> thanks
>
> 73 Jerry
> K1JOS
>
> -----Original Message-----
> From: Collins [mailto:collins-bounces+jsternmd=att.net at listserve.com] On
> Behalf Of billriches
> Sent: Friday, March 21, 2014 12:09
> To: collins at listserve.com
> Subject: {Collins} KWS-1 Blower motor bearings
>
> Greetings,
>
> On my butchered KWS-1 project - Fan sounded like a cement mixer - Ordered
> Bearings # WC87938 from Johnson Bearing - 885-359-1049 for about $6.00 and
> received them a few days later. Good instructions on W8ZR web site for
> repair.  Old bearings were tight however small motor bearing puller worked
> fine.  Cleaned up rotor, put in a baggie, and put in freezer for a few days.
> New bearings arrived and since the shaft had shrunk from the cold just a
> smidge, the new bearings slid right on the shaft.  Sounds much better- most
> of the noise is from the fan as it is moving a bunch of air.
>
> 73,
>
> Bill, WA2DVU
> Cape May
>>

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