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Unfamiliar dimensional call-out. Help needed.

thread1103-493677

Unfamiliar dimensional call-out. Help needed.

Unfamiliar dimensional call-out. Help needed.

(OP)
Hello,

I'm trying to understand the location of the thru holes on the attached schematic. The image shows a mounting method for a level sensor. Any help is greatly appreciated.

RE: Unfamiliar dimensional call-out. Help needed.

B.C. = bolt circle with either a 1.50 inch or a 38 mm diameter.

RE: Unfamiliar dimensional call-out. Help needed.

Not the correct way to dim.
But, 1.50 eq sp means the 4 holes are eq sp on that dia, 90 deg apart. But, does not show the orientation to the part.

ctopher, CSWP
SolidWorks '19
ctophers home
SolidWorks Legion

RE: Unfamiliar dimensional call-out. Help needed.

A lot depends on what is 1.50"/38 B.C. and what it shows. You may want to post it too if you are looking for help at understanding the location of those holes.

RE: Unfamiliar dimensional call-out. Help needed.

A number in parentheses seems to be either mm or a quantity, depending on where it is.

A number after a "/" seems to be either mm or a quantity, depending on where it is.

So basically, good luck with your guess.

RE: Unfamiliar dimensional call-out. Help needed.

Ripped from the files of "What Not To Do (Drafting Edition)...

RE: Unfamiliar dimensional call-out. Help needed.

Are there any more views on that drawing?

Type 61 sounds enough like Code 61 to make me wonder.

Type 61 looks to be a "standard" in industries that use pipe for light duty structural service.
Not much like your image. Countersunk bolt holes for a start.
https://www.simplifiedbuilding.com/pipe-fittings/k...

RE: Unfamiliar dimensional call-out. Help needed.

Old school prior to GD&T. For 1/4 soc hd screws. Old timers held the True position required for assembly. 3Ddave is correct. Being it was on a diameter.

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