The 9x20 Mods Thread

[Bill Gruby]

We are almost done. Shafts to go, two of them. Then the cover bolts and hand wheel.

"Billy G"

 

[savarin]

Re: 9x20 tool post flex

• The donut mount is worthwhile. Mine was a good improvement but ultimately the compound is the enemy. Makinging a solid platform for the qctp and only using the compound when needed is a better solution on a 9x20. That let me start taking much heavier cuts and part larger diameter steel more successfully.​

This is so true as I have just found out.
Starting work on my 4 jaw chuck back plate and turning down the weld I saw it flex again.
When I put my thumb on the join between the compound top and base I could feel the two parts separating when cutting and a close scrutiny of the top of the toll post showed it also moving.
By screwing all three compound gib screws tight it came under control but then I couldnt move the compound.
Another project now required.

 

[Bill Gruby]

The three gear pocket is done. Back bearings are next.

"Billy G"

 

[Bill Gruby]

The lead screw is set. All is well. It is very smooth. Now on to the other two.

"Billy G"

 

[Bill Gruby]

It was time to get the depth of the gear pocket done. After the math it needed to be .080 less than it was. I faced off the case .080 and checked the fit. Perfect. The gears can move only .001 on the shafts. I put it together on the lead screw and the movement is as smooth as before. Getting closer. hew:

"Billy G"

 

[Bill Gruby]

Two gears and shafts in. One to go.

"Billy G"

 

[savarin]

Looking good Bill. The more I think about this mod the more I think of using a reduction gear would be a good idea.

 

[Bill Gruby]

I like that idea Charles. It will help in finish. Your feed will be more controllable.

"Billy G"

 

[Bill Gruby]

That last pic left a lot to be desired. Here it is again with everything cleaned up.

"Billy G"

 

[Bill Gruby]

Make the Hand Wheel adapter and it is complete Charles. Sorry it took so long.

"Billy G"