Control Plate with a large number of drilled holes
Control Plate with a large number of drilled holes
(OP)
Hello,
I am working on a machining print of a part with a large number of drilled holes. How would you guys go about dimensioning the Diameters of those holes? The way I want to do it is 4x 15mm, or 12x 5.2mm. Will there be any confusion given the large number of holes of similar size?
Thanks
I am working on a machining print of a part with a large number of drilled holes. How would you guys go about dimensioning the Diameters of those holes? The way I want to do it is 4x 15mm, or 12x 5.2mm. Will there be any confusion given the large number of holes of similar size?
Thanks





RE: Control Plate with a large number of drilled holes
On the drawing, remove all the dimensions and replace them with a large letter which corresponds with the table. I have Autocad 2008 and I just pull down the Draw menu and select Table. This will bring up a utility that lets you create the table as needed. When finished it will put a table on the drawing where you click and then will open the editor to "fill in the blanks."
I hope this helps.
Frank Reid
One test is worth a thousand expert opinions. - Dan Joos, test engineer
RE: Control Plate with a large number of drilled holes
I wrote:
>On the drawing, remove all the dimensions and replace them with a large letter... <
I should have said "on the plate remove all the hole dimensions and replace them..."
Also, you might want to add a third column to the table titled QUANTITY and put the number of holes of each size in its row. This allows the machinist to see how many holes to drill before changing drills.
Frank Reid
One test is worth a thousand expert opinions. - Dan Joos, test engineer
RE: Control Plate with a large number of drilled holes
Another thought - color code each hole - RED=14mm, GREEN = 12mm, etc. etc
Or use X, O, P, M or some letter code for each size.
Done all above.
RE: Control Plate with a large number of drilled holes
RE: Control Plate with a large number of drilled holes
RE: Control Plate with a large number of drilled holes
This is the standard method for drilling holes in metal plates. Chicopee is correct that there needs to be a starting point to begin the drilling. The machinist will have it easier for locating the drill locations. In the plate shown the upper left corner would be the reference point. I often use an arrow pointing to that corner with the note 0,0 to make it clear.
Frank Reid
One test is worth a thousand expert opinions. - Dan Joos, test engineer