C
* * Chas
Guest
"Ted P." <[email protected]> wrote in message
news:[email protected]...
> Sheldon Brown wrote:
> > cotterlesscrank wrote:
> >
> >>> I've been trying to remove the Shimano 7spd freewheel on my beater
in order
> >>> to replace three broken spokes on the drive side. I've got the
Park FR-1
> >>> tool, tried everything to get the damned thing off, including
using a box
> >>> wrench and whacking on the handle with a mallet as suggested on
Sheldon
> >>> Brown's website, to no avail. I don't think the freewheel's
coming off.
> >
> > [email protected] wrote:
> >
> >> Get a piece of pipe, as long as necessary, and put it on the
wrench.
> >> Get someone to hold the wheel vertically on the ground by the rim
so
> >> they can get good counter-torque on the hub, and then push down on
the
> >> pipe. I think the freewheel will come off.
> >
> > Using a pipe and cheater bar like this won't allow any more torque
to
> > the tool than the usual technique of using a good bench vise.
> >
> > The problem is getting enough torque on the wheel/hub, and the pipe
> > doesn't help with this.
> >
> >> I don't see how hitting it with a mallet will work.
> >
> > The fact is that it _does_ work! The impact can generate a greater
> > instantaneous torque than you can supply with a steady twist. This
is
> > the same principle used in impact wrenches for automotive work.
> >
> > This is not based on armchair theorizing. I've used this technique
> > many times on recalcitrant freewheels that wouldn't respond to the
> > usual bench vise approach.
> >
> > Sheldon "Empiricist" Brown
> > +-------------------------------------------------------------+
> > | If brute force doesn't work, you're not using enough! |
> > | --BOB Simon |
> > +-------------------------------------------------------------+
> > Harris Cyclery, West Newton, Massachusetts
> > Phone 617-244-9772 FAX 617-244-1041
> > http://harriscyclery.com
> > Hard-to-find parts shipped Worldwide
> > http://captainbike.com http://sheldonbrown.com
> >
> Sheldon
> This does work. It might take more than one or two taps (same
principle
> a good machinist uses to free frozen nuts). I. Newton would do it if
he
> had a freewheel he wanted to get off.
> Regards
>
> --
>
> Ted "Inertia" Polk
Impact wrenches, YES! Get a BFH!
I've had to replace old (very old) freewheels where the 2 drive notches
were totally stripped out. I had to disassemble the freewheel and put
the inner freewheel body in a vise to remove it. Even then it was hard
especially if someone had forced a French or English freewheel on an
Italian hub or some misfitting combination thereof.
I've also twisted off a number of Phil freewheel tools under the same
circumstances.
At our shop we had several thread chasing dies to clean up buggered hub
freewheel threads.
Chas.
news:[email protected]...
> Sheldon Brown wrote:
> > cotterlesscrank wrote:
> >
> >>> I've been trying to remove the Shimano 7spd freewheel on my beater
in order
> >>> to replace three broken spokes on the drive side. I've got the
Park FR-1
> >>> tool, tried everything to get the damned thing off, including
using a box
> >>> wrench and whacking on the handle with a mallet as suggested on
Sheldon
> >>> Brown's website, to no avail. I don't think the freewheel's
coming off.
> >
> > [email protected] wrote:
> >
> >> Get a piece of pipe, as long as necessary, and put it on the
wrench.
> >> Get someone to hold the wheel vertically on the ground by the rim
so
> >> they can get good counter-torque on the hub, and then push down on
the
> >> pipe. I think the freewheel will come off.
> >
> > Using a pipe and cheater bar like this won't allow any more torque
to
> > the tool than the usual technique of using a good bench vise.
> >
> > The problem is getting enough torque on the wheel/hub, and the pipe
> > doesn't help with this.
> >
> >> I don't see how hitting it with a mallet will work.
> >
> > The fact is that it _does_ work! The impact can generate a greater
> > instantaneous torque than you can supply with a steady twist. This
is
> > the same principle used in impact wrenches for automotive work.
> >
> > This is not based on armchair theorizing. I've used this technique
> > many times on recalcitrant freewheels that wouldn't respond to the
> > usual bench vise approach.
> >
> > Sheldon "Empiricist" Brown
> > +-------------------------------------------------------------+
> > | If brute force doesn't work, you're not using enough! |
> > | --BOB Simon |
> > +-------------------------------------------------------------+
> > Harris Cyclery, West Newton, Massachusetts
> > Phone 617-244-9772 FAX 617-244-1041
> > http://harriscyclery.com
> > Hard-to-find parts shipped Worldwide
> > http://captainbike.com http://sheldonbrown.com
> >
> Sheldon
> This does work. It might take more than one or two taps (same
principle
> a good machinist uses to free frozen nuts). I. Newton would do it if
he
> had a freewheel he wanted to get off.
> Regards
>
> --
>
> Ted "Inertia" Polk
Impact wrenches, YES! Get a BFH!
I've had to replace old (very old) freewheels where the 2 drive notches
were totally stripped out. I had to disassemble the freewheel and put
the inner freewheel body in a vise to remove it. Even then it was hard
especially if someone had forced a French or English freewheel on an
Italian hub or some misfitting combination thereof.
I've also twisted off a number of Phil freewheel tools under the same
circumstances.
At our shop we had several thread chasing dies to clean up buggered hub
freewheel threads.
Chas.
