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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Powder coat problem :(
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Author Topic: Powder coat problem :(  (Read 1502 times)

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Offline Gizmo

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Powder coat problem :(
« on: October 07, 2012, 10:43 AM »
Hi just got a frame back from powder coating , but the bottom bracket cups won't fit
as they powdered inside the bb  :(
Had a 4lb sledge hammer on it ( with a block of wood either side lol ) & nothing
 
Any ideas ? Part from dont take it there again  :LolLolLolLol: ta

Offline pickle

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Re: Powder coat problem :(
« Reply #1 on: October 07, 2012, 10:47 AM »
I guess you could file off the powder from inside but it may chip bits off the BB  ???

You didn't send it to Dan then

gavking

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Re: Powder coat problem :(
« Reply #2 on: October 07, 2012, 11:11 AM »
Get a stanley blade and cut the powder coating away around  the inner  edge of the bottom bracket tubing and then scrap the powder off with said blade insinde the bottom
bracket till the coating is off!! this should stop you chipping the stuff on the parts of the frame you can see!!

Offline threaders

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Re: Powder coat problem :(
« Reply #3 on: October 07, 2012, 11:58 AM »
I had the same touble. I was told to stick the bearing cups in the freezer for a couple of hours, then take em out and you can push them in easy with just your hands. Worked a treat as no need for hammer or any tools :daumenhoch:

Offline Julian347

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Re: Powder coat problem :(
« Reply #4 on: October 07, 2012, 12:17 PM »
I had the same touble. I was told to stick the bearing cups in the freezer for a couple of hours, then take em out and you can push them in easy with just your hands. Worked a treat as no need for hammer or any tools :daumenhoch:

x2

Offline animal

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Re: Powder coat problem :(
« Reply #5 on: October 07, 2012, 02:15 PM »
I always use a dremel with a little sanding disc on it and get all the powder off the inside of the BB and headset cups where they fit  ;) If u don't and force the cups in it will crack the powder or chip it off making a mess . Same applies on painted frames  :daumenhoch: Also grease the cups before fitting that helps aswell.

Offline Finny

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Re: Powder coat problem :(
« Reply #6 on: October 07, 2012, 03:37 PM »
Hi just got a frame back from powder coating , but the bottom bracket cups won't fit
as they powdered inside the bb  :(
Had a 4lb sledge hammer on it ( with a block of wood either side lol ) & nothing
 
Any ideas ? Part from dont take it there again  :LolLolLolLol: ta

The thing is if you have the cup on a very slight angle and I mean slight, it wont go, lay bike on side on a blanket with wood underneath the BB, and another piece of wood on top of the cup, hold it square and get someone else to do the hammering (If you trust them) some of mine have been a pig to get in and thats with no powder on the inner BB Tube, should go in mate!!  :daumenhoch:

Offline midschooljon

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Re: Powder coat problem :(
« Reply #7 on: October 07, 2012, 03:59 PM »
Just remove the paint from inside the BB using any one of the methods mentioned. Do NOT smash them in with a hammer or even inset frozen cups. Both methods work, but in a year or so when you want to swap cranks, or strip the bike to sell, you will wish you had never done that because they will not come out.
« Last Edit: October 07, 2012, 05:03 PM by midschooljon »
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Offline Twesnik

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Re: Powder coat problem :(
« Reply #8 on: October 07, 2012, 04:00 PM »
I always use a dremel with a little sanding disc on it and get all the powder off the inside of the BB and headset cups where they fit  ;) If u don't and force the cups in it will crack the powder or chip it off making a mess . Same applies on painted frames  :daumenhoch: Also grease the cups before fitting that helps aswell.


+1.
 :daumenhoch:

Offline kev-s

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Re: Powder coat problem :(
« Reply #9 on: October 07, 2012, 04:13 PM »
as already said remove any excess powder from the bb using a dremel/sandpaper etc...

you get this with almost every powder coater as they dont/wont spend the time masking up these areas

i know dan does but his powder is show condition and is reflected in the price

some people expect too much from a £25 powder coat job :daumenhoch:

Offline dordymush

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Re: Powder coat problem :(
« Reply #10 on: October 07, 2012, 04:19 PM »
sledge hammer  :knuppel2:
dave the bmxing gypo


Offline HARORIDER

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Re: Powder coat problem :(
« Reply #11 on: October 07, 2012, 07:49 PM »
thats why i always send my stuff to SBD-dan really knows not only how to paint and powder but what goes where and how to prep it right,just a lot less hassle and in hindsight costs less in the end  :daumenhoch:

Offline superbikedan

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Re: Powder coat problem :(
« Reply #12 on: October 07, 2012, 08:03 PM »
thats why i always send my stuff to SBD-dan really knows not only how to paint and powder but what goes where and how to prep it right,just a lot less hassle and in hindsight costs less in the end  :daumenhoch:

just tell your local powder coater to mask off the bottom bracket and head set tube, it's five minutes of his

time saving you stressfull hours of your time especially if you chip the paint work :daumenhoch:
For powder coating drop me a pm

Offline Peter J

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Re: Powder coat problem :(
« Reply #13 on: October 07, 2012, 09:10 PM »
one of these

http://compare.ebay.co.uk/like/150874463977?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&cbt=y

and a drill  :daumenhoch:

Take a bit off at a time as you still need it to be a "push fit"  :daumenhoch:
I might actually build a bike this year instead of just hoarding parts :)

Offline Gizmo

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Re: Powder coat problem :(
« Reply #14 on: October 07, 2012, 10:40 PM »
thanks for the tips guys  :)
ill let you know how it pans out
gonna do one of the above in the
week , when got 5 mins or a couple
of hrs lol

Offline superbikedan

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Re: Powder coat problem :(
« Reply #15 on: October 07, 2012, 11:02 PM »
thanks for the tips guys  :)
ill let you know how it pans out
gonna do one of the above in the
week , when got 5 mins or a couple
of hrs lol

good luck,  one little tip for you, run a knife or file at the  sharp edge of the bottom bracket where the cups go,

that will break the seal and the powder wont chip or flake off as now it's not connected but has a clean line

between it :daumenhoch:
For powder coating drop me a pm

Offline CustardLips

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Re: Powder coat problem :(
« Reply #16 on: October 08, 2012, 01:11 AM »
Provides excellent results when using his services !
Provides excellent advice when not using his services !
SBD - Top Man !  :daumenhoch:
"Every year is getting shorter, never seem to find the time"

"WWG1WGA"

Offline Gizmo

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Re: Powder coat problem :(
« Reply #17 on: October 14, 2012, 12:21 PM »
Provides excellent results when using his services !
Provides excellent advice when not using his services !
SBD - Top Man !  :daumenhoch:

Absolutly  :) went with the blade on the inside , cups fitted a treat
To be fair the guy I took it to does radiators & railings  :LolLolLolLol:

Thanks for the tips  :daumenhoch:

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Powder coat problem :(
 

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