BMX old Freewheel removal Help please

Hi There

I am trying to help someone at work with his daughters BMX. The freewheel is broken and I thought I could remove it for him and install one of my old freewheels.

I cannot seem to remove the old freewheel with my 4 notch tool because it is different. On the freewheel it reads "Made by Cold Forged Technology Power Removal System by DNP"

It looks like there are 8 notches on this freewheel. Please see attached pics.

Any help much appreciated.

Thanks

2 Attachments

You might have success using a normal (geared bike) freewheel or cassette removal tool, they have 8 or 12 splines of approx. that size.

cheaper bmx type freewheels often use weird and wonderful notchs to get them off (2,3,4 prong/slot type tools).

cassette tool.

freewheel tool

this will do it, but £.
http://www.sjscycles.co.uk/park-tool-fr8c-bmx-screw-on-freewheel-remover-prod12958/

otherwise utilise WD40 followed by a wholehearted bashing with a screwdriver against the notches. Has your lbs got the correct tool you could borrow before this rampant assault?

if the free wheel is caput and your not worried about wreching it.

hold the wheel firmly ... standing on it is good

have a look at the flat face of the freewheel between the cog and the notched body there should be 2-4 indentations which look like you could get a pin spanner in

use a small flat screwdriver or punch and a hammer and place the screwdriver or punch into one of the indents and try to drift it clockwise. as if tightening it up. it is a treaded cone which will unscrew.
once you have freeded it it should unscrew by hand.

under this there wil be alot of small balls / shims along with the pawls and springs

these will go everywere as you remove the cone / cog from the freewheel.

once you have removed all this take you wheel clamp the exposed body of the freewheel and remove it in the same fashion as you would with a normal remover.

Alkali not quite sure what your getting at with that tool? thats the common one with a 4 slot job, or 2 slot for the rest. The one the OP has about 8 or 10 notchs like a normal freewheel tool.

+1 for destructive method. Can't hurt the hub unless you go mad with the clamps/vice/mole grips trying to unscrew it.

i searched the dnp freewheel removal tool on google. Park recommend this one, though it only has 4 splines they are narrow they will fit into every second one of the notches that are visible around the edge. Apparently.

I've managed to remove a few of these using wd40 and a fat old screwdriver + hammer to tap the inner bit of the mechanism round.

From the pictures it looks like a sealed / pressed together freewheel. No pin holes.

The park tool looks like it would work.

Do you have access to an engineers bench vice??? Try gripping very tightly on the sprocket, not the teeth, to crush the outer to the main body and turn anti-clockwise.

Other than that, a big hammer / screwdriver or punch. And some choice Anglo-Saxonisms.

Thanks for all the help I think I will give the destructive method a try!!

wait! another method I've used. Remove the axle.

Get a nail, cut it so that it just fits across the diameter and wedges firmly into the notches. Grab the nail with pliers and twist it, maybe use molegrips or even wedge a tiler's hammer in there for mega leverage. the nail forms the opposite of the slot in a slotted screw.

Sorry, I can't do you a pic, but this is worth a go.

like this. otter added to give a sense of scale.

never thought of using an otter in a technical drawing, but its brightened my day up.
will use in future on clients drawings :D :D :D