Hole diameter and tolerance for introduce a shaft
Hole diameter and tolerance for introduce a shaft
(OP)
Hello All,
Basically I want to specify the size of a hole and tolerance in a plate to introduce a shaft and then weld the shaft to the plate. See attached image.
Thanks in advance.
Basically I want to specify the size of a hole and tolerance in a plate to introduce a shaft and then weld the shaft to the plate. See attached image.
Thanks in advance.





RE: Hole diameter and tolerance for introduce a shaft
That will make hole 200 +0.250/-0.000, shaft 200 +0.000/-0.250
Don't take my word for it, wait for more responses
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Hole diameter and tolerance for introduce a shaft
RE: Hole diameter and tolerance for introduce a shaft
thanks keyen by the observation.
RE: Hole diameter and tolerance for introduce a shaft
RE: Hole diameter and tolerance for introduce a shaft
An example piece for honing/grinding capability that I came across once was a pin in a cylinder. There was a rubber plug to seal one end of the cylinder. It was easy to assemble the pin, put it part way into the cylinder and then seal the end with the plug. At that point the assembly could be set upright on the pin. The remaining air in the cylinder would act as a cushion and the cylinder could be spun freely, like a top, which it would do for a long time. At no point would air leak between the cylinder and the pin. The clearance between the two parts was on the order of a few millionths of an inch or less.
RE: Hole diameter and tolerance for introduce a shaft
https://mdmetric.com/Ch6.8wGO.pdf
As always, real life is an art of making compromises. Too tight fit may cause issues during assembly (although often there are ways to deal with it by designing components properly). With too much loose between parts, there may be, for example, problems with potential unwanted perpendicularity error of the plate relative to the shaft axis.
In some cases, as tbuelna mentioned, the decision on the amount of considered loose may be left up to a fabricator. But in some cases it will not work - imagine that the components are delivered by two separate fabricators.
I guess only designer knows enough to choose the best option.
RE: Hole diameter and tolerance for introduce a shaft
Interesting question - if hole and shaft both pass respective GO gauges, shouldn't they fit?
Especially if the Rule 1 is in place.
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: Hole diameter and tolerance for introduce a shaft