cutting a 1" threaded fork
05-23-08, 07:01 AM
#1
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cutting a 1" threaded fork
im in the middle of a build up that im doing and the fork im using for this road bike is a bit too long.
I have added a couple small spacers and want to cut the fork down at this point.
I have measured with the fork installed and it looks like ill be cutting 3 to 4 threads above my top spacer. I think this will allow for my top lock nut to thread on just the right amount without bottoming out.
Are there any guidelines to this or tricks?
I was a LBS yesterday and they wanted $20 to cut off the fork which seemed a bit high considering all they have to do is put the proper jig on there and hack it off.
Im thinking that ill leave an old bearing race threaded on an the right height and use that as a guide and then cut it off that way. When i thread off the old race im hoping that cleans up the threads enough to thread on my equipment.
I have added a couple small spacers and want to cut the fork down at this point.
I have measured with the fork installed and it looks like ill be cutting 3 to 4 threads above my top spacer. I think this will allow for my top lock nut to thread on just the right amount without bottoming out.
Are there any guidelines to this or tricks?
I was a LBS yesterday and they wanted $20 to cut off the fork which seemed a bit high considering all they have to do is put the proper jig on there and hack it off.
Im thinking that ill leave an old bearing race threaded on an the right height and use that as a guide and then cut it off that way. When i thread off the old race im hoping that cleans up the threads enough to thread on my equipment.
05-23-08, 07:12 AM
#2
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im in the middle of a build up that im doing and the fork im using for this road bike is a bit too long.
I have added a couple small spacers and want to cut the fork down at this point.
I have measured with the fork installed and it looks like ill be cutting 3 to 4 threads above my top spacer. I think this will allow for my top lock nut to thread on just the right amount without bottoming out.
Are there any guidelines to this or tricks?
I was a LBS yesterday and they wanted $20 to cut off the fork which seemed a bit high considering all they have to do is put the proper jig on there and hack it off.
Im thinking that ill leave an old bearing race threaded on an the right height and use that as a guide and then cut it off that way. When i thread off the old race im hoping that cleans up the threads enough to thread on my equipment.
I have added a couple small spacers and want to cut the fork down at this point.
I have measured with the fork installed and it looks like ill be cutting 3 to 4 threads above my top spacer. I think this will allow for my top lock nut to thread on just the right amount without bottoming out.
Are there any guidelines to this or tricks?
I was a LBS yesterday and they wanted $20 to cut off the fork which seemed a bit high considering all they have to do is put the proper jig on there and hack it off.
Im thinking that ill leave an old bearing race threaded on an the right height and use that as a guide and then cut it off that way. When i thread off the old race im hoping that cleans up the threads enough to thread on my equipment.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
05-23-08, 07:14 AM
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no it is 1+ inches too tall. I just want to be sure when i cut it i leave 3 to 4 threads on the top so i can thread my top nut on just right
05-23-08, 07:17 AM
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hmm...how high is too high with spacers? with my top cone threaded on where it needs to be to secure the bearings i still have 1 inch sticking above that or 25.5mm. Would it be entirely wrong for me to add 20mm worth of spacers here? Seems like alot.
05-23-08, 07:27 AM
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By the way, you want to undercut for the top nut, not leave extra thread. The nut should bottom out on the upper race/spacers and not on the steer tube. You couldn't get proper compression on the headset otherwise.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
05-23-08, 07:42 AM
#6
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yes....undercut. THats what i meant. I count about 4 threads in my headset lock nut so my plan was to cut leaving 3 threads showing and praying that was just right 
