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Please explain the Cincinnati #2 TCG setting block.

Mr_CNC_guy

Cast Iron
Joined
Jul 29, 2018
Location
New England
I see the setting block feature on my Cincinnati #2 Tool Cutter grinder
has two calibrated pins. One on the lower table and one on the upper
adjustable table. They are precisely 12 inches from the rotating
axis of the upper table.

The setting block (which I don't have) fit in a slot in the lower
table and sets against the two calibrated pins. You can accurately
set the angle of the upper table using gauge blocks. That part I
understand, use some trig and get your desired angle.

What I don't understand is that the setting block is cut at a point
on one side. here is a picture;
Setting_block_3.5_inches.jpg

How does that angle affect the trig calculations?
 
Your #2 must be a different vintage than mine. (IIRC 1953, rebuilt by Denver in the 1970's).

I don't have such a thing (nor the sine pins), and just went through both the Parts List & Catalog, and a couple of different versions of the Operator's Instruction Book, and don't see such a part nor read a reference to this procedure. The closest my docs come is for setting an angle on the table, where one version of the OIB says
Very accurate adjustments of the table for taper reamer jobs may be obtained by clamping an indicator gage to the table T-slot, with the gage finger contacting the swivel table. (Fig 21A). Of course, the gage will not be graduated in taper per foot, but with a little practice, it will greatly reduce the number of cut-and-try settings required to obtain an exact bearing the full length of the reamer.

If you had not already identified the device in the photo, I would have called it a tooth rest.

Added in edit: This wouldn't by any chance be a Monoset or a P&W R6 or R8, would it?
 
My machine is definitely a #2 cutter grinder. Here is the drawing
that shows the setting gauge.
Setting_gauge.jpg

Number 27 is the setting gauge.
Number 26 is one of the reference pins.
The other pin is in the slot shown in the upper table above number 20A.

In the 1951 "Operator's Instruction Book" they describe it on page 23.
 
It is part number 149573. That is part 27 that I reference above.
This is from the 1971 service manual and parts list catalog available
at archive.org. I assume that you mean part number and not serial number.
 








 
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