erik3000
Mechanical
- Sep 13, 2013
- 48
Looking for the most practical way to call out the feature described below for machining.
Imagine a clevis with a slotted hole roughly like this:
Except with a curved (constant radius) slot, as with the link shown in this image:
The slot will have a tight sliding fit with a close tolerance pin which goes through both clevis lugs.
Were it a straight slot, I would dimension and tolerance both the width and length of the slot as continuous features, and non-dimensioned "2X R" for the end radii (would the "2X R" also be noted continous in this case?).
For the curved slot, I'm not sure of the best approach.
A surface profile (all around) cannot be made a continuous feature, and is not the ideal tolerance method for a pin joint.
Can the slot width be dimensioned directly? (and then use "2X R" as with the straight slot). What about the arc length of the slot? Perhaps dimension the radii of the circular arc described by the slot?
Imagine a clevis with a slotted hole roughly like this:
Except with a curved (constant radius) slot, as with the link shown in this image:
The slot will have a tight sliding fit with a close tolerance pin which goes through both clevis lugs.
Were it a straight slot, I would dimension and tolerance both the width and length of the slot as continuous features, and non-dimensioned "2X R" for the end radii (would the "2X R" also be noted continous in this case?).
For the curved slot, I'm not sure of the best approach.
A surface profile (all around) cannot be made a continuous feature, and is not the ideal tolerance method for a pin joint.
Can the slot width be dimensioned directly? (and then use "2X R" as with the straight slot). What about the arc length of the slot? Perhaps dimension the radii of the circular arc described by the slot?