Present for graduating dental student

[BrianA]

Walnut and maple . Finished on the lathe. I stacked cut the walnut and maple to cut the tooth. I cut at a 2 degree angle but the bottom tooth (walnut) fit tighter than the top cut of maple. Not sure why?

[rjweb]

Very nice, RJ

[Scrappile]

I like it!  Great unique gift!

[Richard Hotchkiss]

Looks very nice & am sure they will love it, keep up the good work.

[wombatie]

Very unique. 

Marg

[daveww1]

nice job

[BrianA]

Thanks for the positive comments.

Can you tell me why the bottom cut of the stack fit better than the top cut. You can see one side with walnut tooth fits tight but maple tooth is  a bit looser. Cut both at same time at 2 degree cut? Maple was stacked on top of walnut then cut.

[Scrappile]

could you have cut it going the wrong direction? clockwise/counter-clockwise?

[jerry walters]

I'm no expert on this type of cut, but I would think the top would cut at a different angle.  If the walnut were on top the maple would have been a perfect fit.  Just my opinion.  I think if you had cut each by itself they both would have fit.  Hope this makes sense.

Jerry

[yamatetsu]

22 hours ago, BrianA said:

Thanks for the positive comments.

Can you tell me why the bottom cut of the stack fit better than the top cut. You can see one side with walnut tooth fits tight but maple tooth is  a bit looser. Cut both at same time at 2 degree cut? Maple was stacked on top of walnut then cut.

It's because of the stack cut. On the top of the top board (maple),  the saw blade basically starts at 0 degrees and cuts diagonally down, ending at 2 degrees at the bottom of the top board. This means that the maple tooth's surface area of the top is slighly smaller than that of the bottom.

Since you did a stack cut, the saw blade starts at 2 degrees on the top of the bottom board (walnut) and then cuts diagonally down to 4 degrees at the bottom. This means that the top surface area of the walnut tooth is already as big as the bottom surface area of the maple tooth and the surface area of the botton gets even bigger.

 

So the maple tooth is a bit smaller than the walnut tooth. It's not much because it was just a two degree cut.

Likewise, the hole in the walnut is a bit smaller than that in the maple. By cutting you removed a little material the width of the saw blade. So now the holes are a bit larger than the teeth, the hole in the maple board being smaller than in the walnut board.

Now you put the larger tooth (walnut) into the smaller hole (maple). This probably fits so well because by sheer luck the 2 degree cut made the walnut tooth that bit bigger that accounts for the material that was removed by the sawblade in the maple board.

The hole in the walnut board is bigger because the tooth is bigger than the maple tooth and there was material removed by the sawblade.

So when you put the smaller maple tooth in the bigger hole of the walnut board, there will be a gap.