Go Back  Bike Forums >
Reload this Page >

Bike Forums

Classic & Vintage

Shimano 600 headset nut

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Shimano 600 headset nut

Old 08-30-22, 10:02 PM
  #1  
Thalia949
Junior Member
Thread Starter
 
Join Date: May 2019
Location: Southern Cal
Posts: 105

Bikes: Masi Gran Crit, Bianchi Campione D' Italia 84, Eddy Merckx Corsa Extra, Ibis Ripley, Co Motion Tandem, Merlin Agilis, Ritchey Breakaway, Bianchi Infinito CV, Colnago Master

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 84 Times in 39 Posts
Shimano 600 headset nut

Does anyone have any hacks on how to remove a Shimano 600 headset top nut? It is the 8 point nut. My LBS doesnít have a wrench that fits for this and recommended pliers. Iím pretty sure pliers will scar it.

I have standard headset 32mm wrenches, so I am better off than pliers but would welcome any input.
Thalia949 is offline  
Old 08-30-22, 10:12 PM
  #2  
bargo68 
Dedicated Detritus Dodger
 
bargo68's Avatar
 
Join Date: Oct 2015
Location: Fairfax, California
Posts: 452

Bikes: Some mighty fine ones at that!

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 176 Post(s)
Liked 521 Times in 225 Posts
Large vise grip set judiciously with a shop rag to keep from scarifying.
Worked for me once on one of these.
No prob.
bargo68 is offline  
Old 08-30-22, 10:21 PM
  #3  
delicious 
dork
 
delicious's Avatar
 
Join Date: Jun 2006
Location: berkeley
Posts: 1,789
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 84 Post(s)
Liked 55 Times in 31 Posts
Looks like someone in Poland is machining reproductions and selling them on eBay for a fair price.
delicious is offline  
Old 08-30-22, 10:25 PM
  #4  
branko_76 
Senior Member
 
branko_76's Avatar
 
Join Date: Jun 2018
Location: The Urban Shores Of Michigami
Posts: 1,737

Bikes: ........................................ .....Holdsworth "Special"..... .......Falcon "Special".......... .........Miyata 912........... ........................................

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 698 Post(s)
Liked 655 Times in 409 Posts
Originally Posted by Thalia949 View Post
Does anyone have any hacks on how to remove a Shimano 600 headset top nut? It is the 8 point nut. My LBS doesnít have a wrench that fits for this and recommended pliers. Iím pretty sure pliers will scar it.

I have standard headset 32mm wrenches, so I am better off than pliers but would welcome any input.
If I had that headset on a bike I liked, I'd look for a dedicated wrench for it.

Not sure if any of these would work but it's worth looking into......

https://www.mcmaster.com/wrenches/op...rement~metric/

https://www.mcmaster.com/wrenches/op...rement~metric/
branko_76 is offline  
Old 08-31-22, 03:44 AM
  #5  
plonz 
Senior Member
 
plonz's Avatar
 
Join Date: Mar 2015
Location: Western MI
Posts: 2,677
Mentioned: 45 Post(s)
Tagged: 0 Thread(s)
Quoted: 595 Post(s)
Liked 326 Times in 219 Posts
Originally Posted by delicious View Post
Looks like someone in Poland is machining reproductions and selling them on eBay for a fair price.
I bought something similar and they work like a champ. Figured if I was going to have a bike or two with this headset permanently in my stable, it was worth that outlay.
plonz is offline  
Likes For plonz:
Old 08-31-22, 04:53 AM
  #6  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,890

Bikes: 1989 Cinelli Supercorsa

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,327 Times in 836 Posts
Please don’t use pliers or vice grips for anything on your bike aside from tightening cables. Use the right tool.

I *personally* wouldn't listen to anyone recommending pliers or vice-grips for this job--up to and including your LBS.

The wrenches linked above on eBay are nice. You can even get originals for a good price.

Last edited by smd4; 08-31-22 at 06:20 AM.
smd4 is offline  
Likes For smd4:
Old 08-31-22, 06:34 AM
  #7  
oneclick 
Senior Member
 
Join Date: Feb 2020
Posts: 2,279
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 862 Post(s)
Likes: 0
Liked 931 Times in 572 Posts
Headset parts are one of the places on a bicycle where unfortunately form often trumps function.

A good open-end spanner should have jaws long enough to hold eight points of that nut, so you don't actually need the special tool; handled properly it won't mark them.

For some headsets the AT508K, a slip-joint plier with replaceable curved soft jaws is a good one - they are commonly available on that auction site.
oneclick is offline  
Old 08-31-22, 07:32 AM
  #8  
jamesdak 
Senior Member
 
Join Date: Aug 2010
Location: Utah
Posts: 8,081

Bikes: Paletti,Pinarello Monviso,Duell Vienna,Giordana XL Super(2)Lemond Maillot Juane (2) & custom,PDG Paramount,Serotta CSI,Fuji Opus III,Davidson Impulse,Pashley Guv'nor,Evans,Fishlips,Prologue TT,Y-Foil,Softride, Tetra Pro, CAAD8 Optimo,Klein Quantum II

Mentioned: 143 Post(s)
Tagged: 0 Thread(s)
Quoted: 2098 Post(s)
Liked 3,187 Times in 1,277 Posts
Originally Posted by plonz View Post
I bought something similar and they work like a champ. Figured if I was going to have a bike or two with this headset permanently in my stable, it was worth that outlay.
Yep, I did the same and works great. Worth the small outlay in cash in my book.
__________________
Steel is real...and comfy.
jamesdak is offline  
Likes For jamesdak:
Old 08-31-22, 07:47 AM
  #9  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,890

Bikes: 1989 Cinelli Supercorsa

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,327 Times in 836 Posts
Originally Posted by oneclick View Post
For some headsets the AT508K, a slip-joint plier with replaceable curved soft jaws is a good one - they are commonly available on that auction site.
In this particular case, and probably most others, the proper tools are cheaper than those pliers.
smd4 is offline  
Old 08-31-22, 08:16 AM
  #10  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,890

Bikes: 1989 Cinelli Supercorsa

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,327 Times in 836 Posts
I would support the use of a properly-sized adjustable wrench over the use of pliers. But I'd prefer to use the proper tool.
smd4 is offline  
Old 08-31-22, 08:22 AM
  #11  
RustyJames 
Senior Member
 
RustyJames's Avatar
 
Join Date: Mar 2021
Location: Beaverton, OR
Posts: 1,156

Bikes: You had me at rusty and Italian!!

Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 457 Post(s)
Liked 704 Times in 395 Posts
*If* water pump/slip joint pliers are going to be used, liberally wrap the jaws with electrical tape. Itís worked for me in the past.
RustyJames is offline  
Old 08-31-22, 10:53 AM
  #12  
markwesti
Senior Member
 
markwesti's Avatar
 
Join Date: Jul 2015
Location: Seal Beach Ca. On the right , next to Long Beach
Posts: 1,773

Bikes: 86' Centurion Ironman

Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
Quoted: 605 Post(s)
Liked 241 Times in 151 Posts
Originally Posted by Thalia949 View Post
Does anyone have any hacks on how to remove a Shimano 600 headset top nut? It is the 8 point nut. My LBS doesnít have a wrench that fits for this and recommended pliers. Iím pretty sure pliers will scar it.

I have standard headset 32mm wrenches, so I am better off than pliers but would welcome any input.
You need a new LBS . The wrenches are on the bay .
markwesti is offline  
Likes For markwesti:
Old 08-31-22, 11:17 AM
  #13  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,890

Bikes: 1989 Cinelli Supercorsa

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,327 Times in 836 Posts
Originally Posted by markwesti View Post
You need a new LBS . The wrenches are on the bay .
Indeed. There's no reason why the shop shouldn't have a set of these wrenches. Hardly used? Maybe. But Shimano 600 stuff hasn't disappeared yet.
smd4 is offline  
Likes For smd4:
Old 08-31-22, 12:27 PM
  #14  
SurferRosa
seŮor miembro
 
SurferRosa's Avatar
 
Join Date: Dec 2018
Location: Pac NW
Posts: 6,918

Bikes: Old school lightweights

Mentioned: 78 Post(s)
Tagged: 0 Thread(s)
Quoted: 2949 Post(s)
Liked 4,260 Times in 2,262 Posts
An adjustable wrench and a rag works just fine, although this probably isn't NASA approved.
SurferRosa is offline  
Old 08-31-22, 02:16 PM
  #15  
genejockey 
Klaatu..Verata..Necktie?
 
genejockey's Avatar
 
Join Date: May 2007
Location: SF Bay Area
Posts: 13,697

Bikes: Litespeed Ultimate, Ultegra; Canyon Endurace, 105; Battaglin MAX, Chorus; Bianchi 928 Veloce; Ritchey Road Logic, Dura Ace; Cannondale R500 RX100; Schwinn Circuit, Sante; Lotus Supreme, Dura Ace

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 7737 Post(s)
Liked 8,356 Times in 4,266 Posts
Originally Posted by jamesdak View Post
Yep, I did the same and works great. Worth the small outlay in cash in my book.
Same here. I did have to take a file to it to get the fit right, but that's a small price to pay, given what a genuine set of wrenches for those headsets bring these days.

Also, the nuts on that headset are aluminum and a poorly fitting wrench or set of pliers would scar them up something terrible.
__________________
"Don't take life so serious-it ain't nohow permanent."

"Everybody's gotta be somewhere." - Eccles
genejockey is online now  
Old 08-31-22, 02:23 PM
  #16  
smd4
Senior Member
 
Join Date: Dec 2020
Location: Wake Forest, NC
Posts: 2,890

Bikes: 1989 Cinelli Supercorsa

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1779 Post(s)
Liked 1,327 Times in 836 Posts
Originally Posted by genejockey View Post
that's a small price to pay, given what a genuine set of wrenches for those headsets bring these days.
The truth? Not much:

Shimano Headset Wrenches
smd4 is offline  
Old 08-31-22, 02:31 PM
  #17  
genejockey 
Klaatu..Verata..Necktie?
 
genejockey's Avatar
 
Join Date: May 2007
Location: SF Bay Area
Posts: 13,697

Bikes: Litespeed Ultimate, Ultegra; Canyon Endurace, 105; Battaglin MAX, Chorus; Bianchi 928 Veloce; Ritchey Road Logic, Dura Ace; Cannondale R500 RX100; Schwinn Circuit, Sante; Lotus Supreme, Dura Ace

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 7737 Post(s)
Liked 8,356 Times in 4,266 Posts
Originally Posted by smd4 View Post
The truth? Not much:

Shimano Headset Wrenches
Those are the newly made ones from Poland. Originals are asking a whole lot more.
__________________
"Don't take life so serious-it ain't nohow permanent."

"Everybody's gotta be somewhere." - Eccles
genejockey is online now  
Old 08-31-22, 02:37 PM
  #18  
StarBiker
Senior Member
 
StarBiker's Avatar
 
Join Date: Feb 2009
Posts: 1,985

Bikes: Bianchi Grizzly, Cannondale F700,

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 783 Post(s)
Liked 139 Times in 110 Posts
Reminds me I went to recycling center/dump the other day and there is a section of bikes a guy picks up and disperses throughout Asia. I have ran into him in the past. Nice guy. There was a bike in the pile with a nice frame (No markings), wheels off to the side, no handlebars and a complete set of shimano 600 components attached. Can't take anything.........
StarBiker is offline  
Old 08-31-22, 02:38 PM
  #19  
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Posts: 8,730

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Mentioned: 127 Post(s)
Tagged: 0 Thread(s)
Quoted: 1367 Post(s)
Liked 926 Times in 647 Posts
The standard eight-point, 32mm locknut flats are featured on most vintage bike's headsets, and the earlier Shimano alloy headsets are no different.

While the Shimano headset has some metal scalloped away from the wrenching area, the normal contact points (nearer to the corners) for the wrench are left intact, so work perfectly with standard wrenches.

Since alloy headset wrenching flats tend to get dented at the corners (rounded in extreme circumstances), Shimano developed a wrench shape interface that better supported multiple corners. It's a better headset wrench for delivering greater torque with less damage near the corners to the wrenching flats.

In lieu of any special tools, and wanting to achieve better tightening using less wrench torque, I first tighten the headset normally, but at reduced torque.
Following this, I reposition the wrenches to different pairs of flats, and repeat the tightening at reduced torque.
What happens is that the threaded bits ovalize slightly in response to pressure against any opposed pair of flats, allowing each subsequent tightening effort to move the wrenched pieces tighter together, finally arriving at full tension as if much heavier torque had been applied initially.

The above process is especially useful when any cable hanger or reflector bracket needs to be kept centered while the wrench tightening is going on, since the centering peg or flat within the hanger/bracket's 1" hole usually allows a lot of off-center freeplay on the steerer's groove or flat, thus allowing unwanted rotation of the hanger/bracket.
One can use reduced torque on just the top wrench while using an elbow, knees or thigh/hip to prevent the handlebar from drifting out of alignment with any cable hanger or bracket while the threaded parts are moving and settling into final tightness and position. The hanger/bracket can often be held from turning using only a bare free hand as the top nut is secured from different pairs of flats at a reduced torque level.
It does help further if all threads and adjacent flat surfaces are greased first, and if several re-positionings of the wrench(es) are used to arrive at final tightening.

So the Shimano headset wrenches are ideal, but not necessary if good, normal headset tools are at hand.

Last edited by dddd; 08-31-22 at 02:50 PM.
dddd is offline  
Likes For dddd:

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 - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.