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

Can't get a socket onto my crank bolts

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.

Can't get a socket onto my crank bolts

Old 07-07-06, 11:02 AM
  #1  
Sammyboy
The Legitimiser
Thread Starter
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,846

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Can't get a socket onto my crank bolts

I'm stripping down an 80's Viner road bike, and come to take off the (frankly wierd, meccano like chainringed) SR Cranks. I can't get my usual, 1/2" drive 15 mm double hex socket in there. Wierd, I think, maybe it's a 14mm. Nope - that socket fits into the hole, but not over the bolt. So I get my 3/8th drive set, which has single hex sockets for the metric one - maybe given the inherent greater strength of single hex sockets, the wall will be thinner. Nope, no go. I dig out the 9/16ths size (once again double hex) socket from the 3/8ths etc - it almost fits, but not quite, as you'd expect on a 15mm bolt. What gives? Is there some secret black magic method I don't know? I have no idea how to get these cranks off......
Sammyboy is offline  
Old 07-07-06, 11:27 AM
  #2  
San Rensho 
Senior Member
 
Join Date: Oct 2005
Posts: 5,655
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 136 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
A standard socket won't fit, theres not enough clearance between the socket and the crank arm. Park has a special tool that works. I don't know if a thin walled socket would work.
__________________
Il faut de l'audace, encore de l'audace, toujours de l'audace

1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1
San Rensho is offline  
Old 07-07-06, 11:30 AM
  #3  
Sammyboy
The Legitimiser
Thread Starter
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,846

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Really? Wow. I got two other cranksets off this week with my standard sockets. Damn those SR people! Thanks, I guess I need another tool.......
Sammyboy is offline  
Old 07-07-06, 12:18 PM
  #4  
masiman
Senior Member
 
Join Date: Oct 2005
Posts: 1,735
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Some of the standard crank extractors have 15mm sockets on the opposite end. As far as I know, all crank arm bolts are 15mm or 8mm(?) allen. I think a thin wall would work but I am not positive.
masiman is offline  
Old 07-07-06, 12:38 PM
  #5  
Sheldon Brown
Gone, but not forgotten
 
Sheldon Brown's Avatar
 
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Posts: 2,301

Bikes: See: http://sheldonbrown.org/bicycles

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Sammyboy
I'm stripping down an 80's Viner road bike, and come to take off the (frankly wierd, meccano like chainringed) SR Cranks. I can't get my usual, 1/2" drive 15 mm double hex socket in there. Wierd, I think, maybe it's a 14mm. Nope - that socket fits into the hole, but not over the bolt. So I get my 3/8th drive set, which has single hex sockets for the metric one - maybe given the inherent greater strength of single hex sockets, the wall will be thinner. Nope, no go. I dig out the 9/16ths size (once again double hex) socket from the 3/8ths etc - it almost fits, but not quite, as you'd expect on a 15mm bolt.
Many older cranks used 15 mm bolts in a standard 22 mm extractor thread. I never heard of a 1/2" drive socket that was small enough to fit into the 22 mm threaded hole.

Some 3/8" drive ones work. Most often they will be 6-point sockets. I know Snap-on works, that's what I use. I seem to recall that Craftsman 6-point 15 mm also fits.

Generally, socket wall thickness will vary with quality. The good ones are made of better steel, so they don't need to be as thick to work without bursting. Cheaper sockets try to make up for low quality by using more metal, and they will not fit.

There are also purpose-made wrenches available from bicycle sourcces. Here are a couple of examples, from Tacx and Lifu, though I mostly sell them for use on single speed wheel nuts:

http://sheldonbrown.com/harris/tools/fixedgear.html

When the Japanese got big into the cotterless crank business in the late '70s, they moved from the 15 mm size to the 14 mm size, which doesn't present this problem.

Have pity on folks with Zeus cranks though, they used 16 mm bolts in the same size extractor threads. There's no currently available wrench that will fit. I've got a friend whose wedge bag was stolen, including his special Zeus wrench, and now he's SOL.

Sheldon "Snap-On Rules" Brown
Code:
+-------------------------------------------+
|  Never do today what you can do tomorrow. |
|  Something may occur to make you regret   |
|  your premature action.     --Aaron Burr  |
+-------------------------------------------+
Sheldon Brown is offline  
Old 07-07-06, 01:28 PM
  #6  
Sammyboy
The Legitimiser
Thread Starter
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,846

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks Sheldon, that's helpful. And there's now way I'm buying anything with a Zeus crank now.......
Sammyboy is offline  
Old 07-07-06, 01:30 PM
  #7  
Philatio
we are 138
 
Philatio's Avatar
 
Join Date: Jul 2005
Location: Knoxville, TN
Posts: 678
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
if you are changing the BB anyways, you could hack saw the spindle off between the crank and the BB shell.
Philatio is offline  
Old 07-07-06, 02:04 PM
  #8  
Sammyboy
The Legitimiser
Thread Starter
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,846

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'm not though. I'm stripping it to sell the parts. Good thinking, otherwise! Although, of course, if I did that, the spindle would still be stuck in the cranks, being bigger at the end I'd be sawing off.....
Sammyboy is offline  
Old 07-07-06, 03:37 PM
  #9  
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
If necessary, you could sacrifice a socket and thin-wall it yourself. I'd stick it onto a square-drive-to-hex adapter on a drill, fire up the grinder, and spin the socket with the drill while milling down the wall on the grinder. With eye protection and a face shield, of course.
mechBgon is offline  
Old 07-07-06, 04:08 PM
  #10  
Mothra
Senior Member
 
Join Date: Jun 2006
Posts: 373
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I just chuck a 15mm socket into a lathe and turn down the outside until it fits in the crank..
Mothra is offline  
Old 07-07-06, 04:35 PM
  #11  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,453

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: 1127 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
Sheldon, I have a Park CCW-2 crank bolt wrench that has 14, 15 and 16 mm sockets so maybe it was intended to work on the otherwise unavailable Zeus crank bolts.
HillRider is offline  
Old 07-07-06, 05:59 PM
  #12  
dafydd
JRA...
 
Join Date: Oct 2003
Location: philly
Posts: 839

Bikes: trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Philatio
if you are changing the BB anyways, you could hack saw the spindle off between the crank and the BB shell.
and then you still have crankarms with bolts you can't remove, unless you have the proper tool in the first place.
dafydd is offline  
Old 07-07-06, 07:40 PM
  #13  
ScrubJ
Senior Member
 
Join Date: Apr 2006
Location: Vero Beach FL
Posts: 1,102
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Mothra
I just chuck a 15mm socket into a lathe and turn down the outside until it fits in the crank..
Damn! What kind of cutter do you use? The carbide cutter in the lathe at the shop won't touch my sockets.
ScrubJ is offline  
Old 07-07-06, 10:25 PM
  #14  
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Posts: 28,321

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dafydd
and then you still have crankarms with bolts you can't remove, unless you have the proper tool in the first place.
At that point you go **** the cranks and get new ones.
operator is offline  
Old 07-07-06, 10:26 PM
  #15  
LWaB
Senior Member
 
Join Date: Dec 2005
Location: Auld Blighty
Posts: 2,240

Bikes: Early Cannondale tandem, '99 S&S Frezoni Audax, '65 Moulton Stowaway, '52 Claud Butler, TSR30, Brompton

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HillRider
Sheldon, I have a Park CCW-2 crank bolt wrench that has 14, 15 and 16 mm sockets so maybe it was intended to work on the otherwise unavailable Zeus crank bolts.
No, that 16 mm was for the Stronglight cranks with 23.35 mm extractor threads.
LWaB is offline  
Old 07-08-06, 01:33 AM
  #16  
Mothra
Senior Member
 
Join Date: Jun 2006
Posts: 373
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by ScrubJ
Damn! What kind of cutter do you use? The carbide cutter in the lathe at the shop won't touch my sockets.
I just get an el cheapo Craftsman type socket. The chrome-plating cuts easily in flakes and the underlying metal isn't that tough.
Mothra is offline  
Old 07-08-06, 06:38 AM
  #17  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,453

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: 1127 Post(s)
Likes: 0
Liked 12 Times in 12 Posts
Originally Posted by LWaB
No, that 16 mm was for the Stronglight cranks with 23.35 mm extractor threads.
Aha! I forgot about those. Thanks.
HillRider is offline  
Old 07-08-06, 06:59 AM
  #18  
dafydd
JRA...
 
Join Date: Oct 2003
Location: philly
Posts: 839

Bikes: trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by operator
At that point you go **** the cranks and get new ones.
a little thinking won't let it reach that point.
dafydd is offline  
Old 07-08-06, 07:26 AM
  #19  
poopncow
MADE IN HONG KONG
 
Join Date: Aug 2005
Location: Washington DC
Posts: 1,763

Bikes: some but not enough

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by ScrubJ
Damn! What kind of cutter do you use? The carbide cutter in the lathe at the shop won't touch my sockets.
never tried cutting a socket, but if it is too hard to cut, it is time for grinding. we used to modify end mills with a surface grinder and a rotating fixture w a drawl collar. but you don't really want to do this to your good sockets? do u?
poopncow is offline  
Old 07-08-06, 04:50 PM
  #20  
Philatio
we are 138
 
Philatio's Avatar
 
Join Date: Jul 2005
Location: Knoxville, TN
Posts: 678
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dafydd
and then you still have crankarms with bolts you can't remove, unless you have the proper tool in the first place.
yea I was thinking in terms of junking the old bb/cranks and putting new ones in.
Philatio is offline  
Old 07-08-06, 07:38 PM
  #21  
ScrubJ
Senior Member
 
Join Date: Apr 2006
Location: Vero Beach FL
Posts: 1,102
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by poopncow
never tried cutting a socket, but if it is too hard to cut, it is time for grinding. we used to modify end mills with a surface grinder and a rotating fixture w a drawl collar. but you don't really want to do this to your good sockets? do u?
Grinder is what we use in the shop when we have to make one of those one off things. Never could cut one in the lathe.
ScrubJ is offline  
Old 07-09-06, 07:51 AM
  #22  
miamijim
Senior Member
 
miamijim's Avatar
 
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 13,923
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 323 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
In all my years of wrenching and working on od stuff I never ran into this probelm unless.......

There were remnants of the dust cap left in the threads....
miamijim is offline  
Old 07-12-06, 04:17 AM
  #23  
Sammyboy
The Legitimiser
Thread Starter
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,846

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Ok, so I blagged an old Craftsman 15mm socket (12 point, but never mind). Not easy to do in the UK, but my dad is a 'Merkin, so I had an advantage. And, it fits! Sheldon Brown wins again.

Miamijim - it's not clear to me how dustcap remnants in the threads could have an effect, except on the crank puller?
Sammyboy is offline  
Old 06-10-16, 08:22 AM
  #24  
Ozpedal
Junior Member
 
Join Date: Jun 2016
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
16mm thin-walled socket

An old thread I know but it helped me on my search for an answer. I was also stumped whilst dismantling a Zeus crank with a 16mm bolt. I bought the following socket which had a 19.5 mm O/D and it fitted in the crank:

https://www.amazon.co.uk/dp/B0016WLF...731_TE_3p_dp_1
Ozpedal is offline  

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.