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Quorn T&C Grinder
Quorn T&C Grinder

The Quorn T&C Grinder is a well known, and well debated, design for grinding and sharpening cutters and tools. My version is standard in all aspects except for the raising/lowering of the motor and grinder head, and some of the fixtures.

My Quorn Tool and Cutter Grinder set up to touch-up the end of an 3/8" diameter endmill in a Clarkson alike holder. Note the handle on the top of the column. I believe that the time spent painting tools could be profitably spent doing something else !
A rear view of the column, showing the internal lead screw and the flat machined the length of the column.
A close up of the front of the Clarkson collet holder.
The box of accessories. Hidden in the back left corner is an adapter to allow the use of the wheels mounted on an 8mm collet to be fitted to the nose of my Bantam, which takes an MT4. There's something for everything I need here so far.
On the near side are some 4 1/4" angle grinder wheels with their mounting collet.
There are a number of areas of the Quorn where the builder is expected to make a design decision. This is how I chose to do the main collet holder. The holder can turn in the frame, and is anchored by a large collet holder.
Here are the three parts of the holder. The nut pulls the split holder into the large graduated ring. I should take some more relief from the split collet, to reduce the torque required on the nut to lock it up sufficiently - it currently needs a little more force than the design intended.
This is one of the larger of the locking handle sizes, another area that needs a decision. I suppose that I copied most of the dimensions from the quill lock on the vertical head on my Centec 2 mill.
Here is a rough drawing of the handles. There are around a dozen of them on the Quorn.
Which means there's always a box with spares and extras - those handles that didn't quite fit at the time, but I might resurrect later.

Page updated on 27th January 2020

Copyright (C) Richard Hart 2015 - 2018