Grinding a very small Radius

Set up basics

To grind a precise radius you need to accurately position to the swing center. To do this we use a dynamic process instead of the pivot center Finder.

Put the tool you’re going to grind in the call. It measured the diameter. Set the desired tool rotation using the tool setter.

Position the upper. Tool spindle body so that it is in the centre. This can be done using the notch, once the. Upper spindle housing is on centre. With the grinding wheel at the angle you intend to use, bring it until you touch the corner of the wheel. Once you’re in this position. You now know that the centre of the pivot is

once you have touched off. Zero. Your hand will dial or your digital readout. Move the upper Y axis of the tool spindle away from the wheel. Move the wheel into what would be centre, in other words, half of the tool diameter. Once you’ve done that. You bring the. Tool back into touch the wheel. Now you’re ready to locate the X axis ’cause you know where the centre is.

Using the microscope bring the tool to the wheel and fine tune

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Small Rads are becoming very easy.
The new lapped in dovetail slides on the x and y Axis table assemblies , combined with a magnified view of the position make diaing in the radius attachment a breeze.

The pivot center / wheel can be easily dynamically located and the tool set with a great degree of repeatability usung the gradated dials.

True and dress the wheel, Load and time the tool, with indexing collar locked in.
Set wheel at height and desired angle to be ground Rotate Tower CCW 2 Degrees.
Center the Upper Y, (tool in the collet) then move off the tool radius 1/2 inch =.250
Bring the wheel at angle to the tool touch off
Rotate the Radius spindle clockwise slowly backing off upper X is necessary (dont crash the wheel)
When fully rotated 90 degrees feed in upper X keeping and eye on things
Your there !

Grinding a very small Radius

Set up basics

To grind a precise radius you need to accurately position to the swing center. To do this we use a dynamic process instead of the pivot center Finder.

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The 4.3 inch Machine Mounted Microscope

Here is a quick set up for corner radius in variable flute tools any diameter any radius

Grinding Small Radius

If you can see it, you can grind it.

This 4.3 Microscope kit is a $340 addition, fits on any JXT works best with the digital readout. Confirm which mounting bolt size 3/8 or 1/4