08-28-2017, 05:16 PM
Since making that spindle tool, I've had different thoughts about design improvement. One of them was to revise the shape of the shallow grooves in which the rollers ride to a convex shape. This would have a more gradual ramp than the concave shape, providing more mechanical advantage and greater wedging security. Although the features in the following sketch have been exaggerated, the concept is clear I think.
The retaining ring concept would have to change because, unlike the original configuration which tends to self-center the rollers, this configuration would probably skew them. Anyway, it's all moot; there's no reason for me to ever make another one since the current tool works.
Vinnie, I just googled "pin chuck" (never heard of it before) and you're dead right, it's very similar. I copped this sketch from the "Fine Woodworking" web site:
Good call !
The retaining ring concept would have to change because, unlike the original configuration which tends to self-center the rollers, this configuration would probably skew them. Anyway, it's all moot; there's no reason for me to ever make another one since the current tool works.
Vinnie, I just googled "pin chuck" (never heard of it before) and you're dead right, it's very similar. I copped this sketch from the "Fine Woodworking" web site:
Good call !