Superman said:
rockmeister said:
If everyone could pray to the Snow Gods to keep it coming.
I think they're listening. The weather guru's are calling for another 5 to 10 inches tonight thru tomorrow. We have 2 ft. + on the ground now. Better get that sled put back together soon.
I know, definitely working on it!
Shooting for riding this weekend! YEAH!
This means anything that isn't required to make the sled ridable will drop on the priority list. lol
Will still do the stuff, just may not be this week.
Thanks RX! Yours is looking great as well!
Was out of town at a friends this weekend, used his press while I was there for the drivers. Thanks Skip!
The press has a patent date of 1906 on it!
Seriously old, yet really tough and a cool design.
Gives a great feel for the amount of force you are putting into what you are pressing.
The only downside is ratcheting the press handle hundreds of times for a long press, like the shafts!!! Whew! :exc:
Pressed the new Doo Extrovert drivers off the Doo shaft.
Pressed the existing Yamaha drivers off the Yammi shaft.
The Doo shaft is 1.110"
The Yammi shaft is 1.060"
A difference of .050"
Had to figure out a way to make up .050"+
Usually Mylar will work well for such things, went to a local store to find some as they used to use mylar sheet for book report covers.
No luck... Apparently they don't make them from mylar anymore.
Ended up finding the report covers, but of a plastic resembling polyethylene.
Bought them, cut a strip out and soaked it in gasoline.
As a general rule, if gasoline won't eat it, most petroleum products won't eat it.
Held up fine.
Ok, so far.
Found a plastic that was .015" thick.
Figured twice around would give me .060" thickness, twice around plus one on each side (.015x2x2).
Cut out, wrapped the plastic in a roll, and slid it part way into the driver.
You don't have to slide the shim this far into the driver, only an inch or so.
Let the roll unwrap a bit and slid it over the Yamaha shaft.
Made sure the previous hex on the drivers was lined up with the hex on the shaft.
Started pressing the driver on the shaft.
I suspected that the shim plastic would slide on the driver plastic as it was pressed on, rather than the metal shaft, but wasn't sure.
Was correct.
I did one just part way as a test to see how well the plastic shim did under compression.
It compressed .001"
Compressed just enough to eliminate the matte finish of the plastic, so it did good under compression. (The main force it will ever see.)
Going in.
After driver is pressed on it.
However, it took a bit less force to put the driver on, as it did to take it off the doo shaft, so I added another turn of the plastic sheet.
The output dimension with 2 wraps of shim plastic, reading 1.113"
.003" interference fit on plastic, wasn't quite enough, so used 3 wraps.
This made the sheet length 10" for a finished shim thickness of approximately .084"
Cut the shim sheet length to an whole number of revolutions around the shaft(3), so that it didn't make the driver eccentric on the shaft.
This worked well!
Force required to press the extroverts on, was now just a touch more than the force required to remove them.
I'm happy with that!
Indexed the 2nd driver and pressed on the shaft in the same manner.
Note the hard to see indexing arrow.
The indexing arrows MUST be on the same hex flat!
I marked the outside edge of the extrovert with a marker to note the index arrow and the orientation of the drivers to make it easy to see at a glance.
Fine tuned driver locations on the shaft to the proper measurements.
Will show proper dimensions and a drawing in a post to follow.
Trimmed excess plastic shim that was sticking out from under the drivers.
Finished Extrovert drivers on shaft.
Note the black indexing marks are lined up, and the clip cut-outs on the drivers are to the outside.
Overall, this went well!
You JUST lost you MAN CARD
