Hollowing with John Jordan tools

[Michael Nathal]

Michael, The hope system has a cutter where you can put it on the Hope straight tool and rotate it to any angle, not just 45 degrees. It will function the same as the Jamison with the cutter at 45 degrees in a straight bar. As far as counter acting torque, articulate arm systems are different. The Hope system uses an I” (may be larger) post the arm fits over to counter act the torque where the Jamison is captured. Would be hard to say which is “better”, but both work well.

Attached is what I mean by "45 degrees". The first photo shows the Jamieson pivoting head inserted in a hole parallel to the shaft. This is equivalent to the Hope straight tool. The second shows it inserted in the 45 degree hole for extra reach.

 

[William Rogers]

Attached is what I mean by "45 degrees". The first photo shows the Jamieson pivoting head inserted in a hole parallel to the shaft. This is equivalent to the Hope straight tool. The second shows it inserted in the 45 degree hole for extra reach.
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I guess I don’t understand what you mean by extended reach. I can reach the same place with the Hope bar and cutter rotated to 45 degrees. All that said I can and have made the shape you have referenced. I do not feel the Jamison bar will offer any additional advantage.

 

[Doug Freeman]

The hollowing hole size, flatness of the top of the piece, and dia or reach distance control where a tool can get to. The off-center reach of the jamieson does not need as much bar angle to reach a given point, at a bar depth past the curve of the hope bar. A greater bar angle requires a larger hole, so yes there are situations where the jamieson could make a cut and the hope could not. The top shape, hole size would need to change for the hope to reach it. People using the hope bar may not have run into the particular situation of these limits due to the shapes hollowed and hole sizes.