Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Facing/Chasing Areas Other Than BB & Headset

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Facing/Chasing Areas Other Than BB & Headset

Old 05-16-16, 10:30 AM
  #1  
Ze Bike Doctah
Newbie
Thread Starter
 
Join Date: Aug 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Facing/Chasing Areas Other Than BB & Headset

I've got a customer who had his DH frame recently painted, and we are handling the reassembly. The painter is an idiot, and taped off exactly one thing: the BB. Now, I can handle facing and chasing things such as headset, BB, brake tabs, and anything threaded. But there are many hinges and faces (he even painted over some bearings in the swingarm) that I've never needed to face before. What tools or techniques can anyone recommend to do so with professional quality? I'm kinda at a loss. We told the guy before he had it painted that any facing work we would have to do is extra, but this is just ridiculous..
Ze Bike Doctah is offline  
Old 05-16-16, 11:37 AM
  #2  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,928

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6836 Post(s)
Likes: 0
Liked 215 Times in 179 Posts
Thanks for sharing , work through it.
fietsbob is offline  
Old 05-16-16, 12:03 PM
  #3  
Spoonrobot 
Senior Member
 
Spoonrobot's Avatar
 
Join Date: Jul 2006
Posts: 3,179
Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 986 Post(s)
Liked 25 Times in 21 Posts
Would it be better to try to remove the paint in a chemical way as opposed to a mechanical way?

Hmm, might be worthwhile to determine if this is actually necessary as well. Worst case scenario may be to contact a independent full-suspension frame builder and find out what they do?
Spoonrobot is offline  
Old 05-16-16, 05:40 PM
  #4  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,492

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 32 Post(s)
Tagged: 0 Thread(s)
Quoted: 1142 Post(s)
Likes: 0
Liked 22 Times in 21 Posts
Can you just scrape off the overspray with a sharp knife or single-edge razor blade? There should be no reason to remove metal.
HillRider is online now  
Old 05-16-16, 06:03 PM
  #5  
Raiden
Senior Member
 
Join Date: Feb 2007
Location: Central CA
Posts: 1,408

Bikes: A little of everything

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
As you know, most scraping tools you're going to have are going to be some kind of steel (razor blades and picks) and I'm assuming a lot of what you're cleaning is going to be aluminum (softer) so it's going to be tough. For things like the swingarm hardware, I think my first attempt would be to cut the paint around the hardware with an exacto or other razor blade, then try some sort of plastic scraper to scrape the paint off. I think I would also experiment with a Dremel with the softest rotary brush they make for it.
Raiden is offline  
Old 05-17-16, 01:34 PM
  #6  
Ze Bike Doctah
Newbie
Thread Starter
 
Join Date: Aug 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The paint job really is good, extremely hard. Not doable with just a razor blade in hand.
Ze Bike Doctah is offline  
Old 05-17-16, 01:36 PM
  #7  
Ze Bike Doctah
Newbie
Thread Starter
 
Join Date: Aug 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
After we told the guy how much we would be potentially charging him to do all this prep work (in the 150 range) he decided to take it to a machine shop and have them try it. Disaster averted...
Ze Bike Doctah is offline  
Old 05-17-16, 07:28 PM
  #8  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,659

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1734 Post(s)
Liked 45 Times in 32 Posts
The common way to assembly prep a new paint job is to first cut the corners then remove the paint from the faces. By cutting corners I mean to take a razor/file and without chipping the paint remove just the paint that is on the edge/corner of any flat surface that will receive a part. So the BB will get the outer edge of the face, the corner at the outside surface of the shell, filed at a 45* angle just enough to break through the paint layer. Then when the face has it's paint removed (whether with a facing cutter, a file or a razor) so the chance of a chip traveling around this corner/edge is FAR less. The same goes for any taped off surfaces. the edge of the tape gets a razor cut through the paint so when the tape is lifted no chips will pull up paint.

I would use these methods to clean up all surfaces of pivot bosses and such before assembly is started. While some better painters might do this it's usually the client that does, IME. Andy
Andrew R Stewart is online now  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Brodie68
For Sale
0
09-20-18 12:47 AM
BillN33
Classic & Vintage
14
05-12-18 02:43 AM
Vintage Raleigh
Classic & Vintage
0
09-09-16 11:47 PM
vonfilm
Hybrid Bicycles
0
06-23-10 11:59 AM
hedgeapple
Classic & Vintage
1
04-04-08 08:45 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.