Tim Neja

iTrader: (1)

If you're creating a SPOOL--why not just take all the diff balls out and tighten it down??

miller tyme

iTrader: (5)

1 extreme side load on bearings, they don't last long
2 risk of pulling the threaded stud out of a carbon axle
3 no weight savings

gigaplex

iTrader: (2)

The only bearing you'll be side loading is the thrust bearing which is designed to take it.

ixlr8nz

I did something like that on an old ae tc3 diff. Took all the balls/plates and thrust bearing out and just drilled a couple of holes through the diff halfs. The bolt goes through the diff halfs and spur gear. Pretty sure i tapped one half so no nut required.

KINGZJ

iTrader: (4)

If you take the balls out and lock the diff it will loosen unless its pinned. The biggest advantage to a spool diff would be weight loss. With 2.5 million in my gear diff it's for all practical purposes locked but its heavy. 25.5 motors lack balls they make good rpm but power is minimal so lightening the axle assembly plus the ability to hook up immediately could prove very beneficial. I just would like to try it if it's easy to use existing parts or I will just make my own to try but would prefer the later.

dmcguire

iTrader: (38)

We used to rubber cement sandpaper to the diff rings and remove the diff balls in the XXXS to make spools. Don't have to crank down that tight to lock it. Though not sure how it would work on a completely round ring (XXXS was a D ring)

miller tyme

iTrader: (5)

thrust bearings slip, the cone rides on the inside ring of bearing, the outside of bearing supports the hub. To truly lock it down and tight enough so it does not loosen, it has to be cranked very tight, the load is applied to ALL components.

Jedd

iTrader: (25)

How are you guys making spools for the rear of the F1 cars and would this work for WGT-R cars

Tim Neja

iTrader: (1)

Well I"d get some E6000 and glue all the diff plates together---inner and outer and then simply bolt it together snugly. Instant "spool"!! And yes--it's the same kind of diff for WGTR cars.

gigaplex

iTrader: (2)

Maybe that's true for some diffs, but that's not how the thrust bearing works in the Associated F6 (only F1 diff I've personally built). None of the conventional bearings would have any side load.

EMU

iTrader: (3)

To lock my xray differential, I removed my balls and replaced the thrust bearing with shims. No problem tightening it down. Certain spurs need modification, if they have increased width around the center hole. To save some weight, you could find some bushings to replace the two bearings between the diff halves.

Most racers at my local track are locking them in similar fashion. Haven't seen any issues with it so far.

Khador12

Here is a spool option.

JayL

That's what I did. Then I can have my ball diff option as well. Actually cheaper than ruining the ball diff and then needing it some day.

Tim Neja

iTrader: (1)

There ya go!! Instant spool!! I was thinking you could go really old school with an axle from the 70's--and two left side hubs instead of trying to lock up a diff!! And you've found the option!! Simple!!

J Lee

This is me 1/2hr ago.