Does anybody here have the instructions for setting the angle on a
Quill master head? I have looked all over the web without success. One
web site has some drawings of possible uses but nothing on how to
actually set the angle with relative ease.
The Quillmaster head changes two angles instead of just one when the
angle is changed. Instead of the interface between the two parts of
the head being parallel to the quill axis the two faces are at an
angle. Lets say the head is adjusted so it is straight. You indicate
on the upper part where the casting is ground. Now you loosen the
screws and change the angle. At any angle other than 180 or 90 the
cutter is actually at a compound angle. I can use the compound angle
formulas to figure out where to set things but I'm sure the things
were shipped with instructions that are hopefully aimed at folks who
don't wanna get out the books just to set up the thing. If you google
for it you will see illustrations. Check out this link:
(snip description of geometry)
Fair enough, sounds like one of those "very useful but not user
friendly" things that applies in so many fields.
Compound angles make my brian hurt. And I built my house with
hip-roofs, so I have direct personal experience in said pain. Best of
luck to you my friend.
It is real handy Pete. When new it must have come with some relatively
simple instructions. And a lot of machinists don't like math so that
makes me think that there might even be a chart or a table or
something. There is a scale on the thing but the numbers don't
correlate to the angle it's at which also leads me to believe there
must be instructions.
I wouldn't hold out too much hope, Eric. I got one in an auction lot several
years ago. The quillmaster, QRA attachment, and wrenches were in all the
original packaging, but the only instructions covered how to attach the QRA to
The QRA has milled flats, similar to a full size right angle attachment except
in the form of an L, which would be useful for setting angles. Perhaps a square
block bored to clamp on the nose of the quillmaster would do the trick?
I'm afraid both the quillmaster and QRA are long gone. After seeing the prices
they were fetching on ebay I couldn't justify keeping them around.
I don't know how to use the scale. From the photos in an old Bridgeport
catalog, it appears the scale is arbitrary. Is that so? I'm having just as hard
a time as you imagining the scale being very useful, but Bridgeport did go to
some trouble to put one on the tool.
It still seems to me that one way to set the angles would be to clamp a pin in
the collet, or some more convenient reference to the nose of the quillmaster.
Then use a sine bar or protractor to measure the angles between the axis of the
quillmaster's spindle and the xy and xz planes of the mill.
Or, put a pin in the quillmaster's collet. Mount a plate with a hole that's a
close fit on the pin on a sine bar or small sine table. Clamp the sine bar or
table to the machine table, tipped up and rotated to the proper angles. Align
the pin in the quillmaster to the hole.