Drilling a fork crown
03-06-10, 01:31 PM
#1
Member
Thread Starter
Join Date: Jun 2009
Posts: 33
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Drilling a fork crown
Looking for tips and tricks before I drill the back of my fork crown for recessed calipers. My fork is chrome so I don't want it to "chip" or flake when I drill it. If anyone has advice please have at it. Per Sheldon Brown, I'll use a 5/16" bit. Thanks ahead of time.
03-07-10, 01:42 PM
#3
mechanically sound
I wouldn't worry too much about it- just use a good sharp bit. As far as chipping, the half concave washer(that I assume you will use) should give you a little breathing room.
03-07-10, 09:02 PM
#4
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,779
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3583 Post(s)
Liked 3,395 Times
in
1,929 Posts
5/16" in the back of the crown (for recessed Allen nut), but 1/4" in the front.
01-12-20, 01:59 AM
#5
Newbie
Join Date: Dec 2019
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Have done this a bunch in the past to convert nutted to recessed brake sets. Did it recently on my 650B converted Voyageur to use the same Tektro mount you are considering. Worked like a charm, but did require the purchase of a new superhard drill bit. Fork crowns are tough rascals!
As a side note, also had to carve up the Tektro mount a bit to a) clear the bottom headset cup and b) fit between the head tube and centerpull, while c) maintaining the correct vertical angle for the cable. Wasn't a major problem, but you may encounter the same situation.
As a side note, also had to carve up the Tektro mount a bit to a) clear the bottom headset cup and b) fit between the head tube and centerpull, while c) maintaining the correct vertical angle for the cable. Wasn't a major problem, but you may encounter the same situation.
