Rick,
Do an eBay search on KP10 bearing. There are about 20 listings varying in
price of $20 to $40. eBay is where I bought my spare KP8 bearings.
GL,
Ray,
N6VR
On Mon, Mar 11, 2013 at 8:39 PM, Grant Saviers <grants2@pacbell.net> wrote:
> There are many KP8 and KP10 bearings on ebay, but I do note they are
> surprisingly expensive if you want a premium brand. Chinese versions are
> much cheaper. However, the pictures show different size KP bearings so
> checking with the seller about the bearing dimensions is probably necessary.
>
> I've found that ebay, McMaster.com and MSCdirect.com have virtually all of
> what I have needed and are far easier sources than chasing around to local
> bearing suppliers to see what they have in stock. MSC has the larger
> selection. Grainger is another source but usually only deals with
> businesses.
>
> The first step is to measure what is being replaced, ID, OD, outer race
> width and inner race width. A $10 digital caliper from Harbor Freight is
> all that is needed. Then to decide if the bearing is inch series or metric
> and look at the catalog web pages.
>
> It seems a bit unusual to use a ball bearing in a weather exposed
> application such as the UST sheeves. There are some stainless steel ball
> bearings, but a very limited set of choices.
>
> Peening the sheave to lock the bearing outer race seems a bit strange.
> However given the KP series wider inner race it seems they are "cheating"
> and hoping the peening locates the sheaves laterally on the bearing outer
> race. Yuk! The sheaves have a lot of force on them so peening seems a
> marginal means to keep them from walking laterally on the outer race. And
> peening against a ball bearing race?? A sure way to dramatically shorten
> its life. It seems UST is doing something "creative".
>
> When I get a chance I'll make some measurements and think about a possible
> better way.
>
> Grant KZ1W
>
>
>
> On 3/11/2013 6:23 PM, Bob K6UJ wrote:
>
>> Rich,
>> I should have read your message before posting. I was going to call US
>> Tower about the bearings too. I have a HDX589, the K10 bearings must be
>> what I need.
>> Now to find some !!!
>>
>>
>> Bob
>> K6UJ
>>
>>
>>
>> On Mar 11, 2013, at 5:30 PM, Rich Hallman - N7TR wrote:
>>
>> I tried calling US Tower all day...but phone just rang. Not sure if
>>> there is a holiday somewhere that they didn't come to work today.
>>>
>>> I found that the bearing inside the sheave is a K10 bearing. Looks like
>>> a KP10 bearing might work but these seem to be REAL hard to locate.
>>>
>>> Thanks for all the ideas from the list. With the amount of towers out
>>> there, I was hoping for a stock replacement solution, but looks like this
>>> is a bit more complicated...or expensive.
>>>
>>> Rich
>>>
>>> -----Original Message-----
>>> From: TowerTalk
>>> [mailto:towertalk-bounces@**contesting.com<towertalk-bounces@contesting.com>]
>>> On Behalf Of Rich Hallman - N7TR
>>> Sent: Sunday, March 10, 2013 5:19 PM
>>> To: towertalk@contesting.com
>>> Subject: [TowerTalk] US Tower HDX-689 Sheave replacement
>>>
>>> Im looking for the 5 inch OD Pulley Sheave for the HDX-689. This is for
>>> the ¼ in cable. I need to order a few of these as I'm replacing all the
>>> cables on the tower right now. I know US Towers had them, but wanted to
>>> see if anyone else has replaced them from another vendor for a better price.
>>>
>>> Thanks...
>>> Rich
>>>
>>> Rich N7TR
>>> ex KI3V, N3AMK, WB3JOV
>>> www.n7tr.com<http://www.n7tr.**com <http://www.n7tr.com>>
>>> http://www.qrz.com/db/N7TR
>>> Telnet: dxc.n7tr.com N7TR DXCluster
>>>
>>>
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