Information on D-Shaft Standard 3

[Edfox023]

I'm looking for some information on a standard method of dimensioning a d-shaft on a drawing. I've included a picture to show what
i'm calling a D-Shaft. I can't find anything on the web or in my books. Any info would be appreciated. Thanks in advance.

 

[looslib]

Not sure of any standard, but I would use a diameter and then a linear dimension from the flat to the oposite side of the shaft.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[pmarc]

You can take advantage of method similar to presented in Y14.5-2009 fig. 4-30. Just forget about datum feature B and 2 holes shown there.
If the flat is not critical to functionality of the shaft you can use less elegant method (in my opinion), that is simply apply two directly toleranced dimensions: 1) for shaft diameter, 2) between flat and the opposite side of the shaft.
Since this looks to be relatively long feature, you may want to condiser control of straightness of derived median line of the shaft as shown in fig. 5-3 (Y14.5-2009).

As a matter of fact you did not write anything about your major functional concern for this application, so please just treat my answer as a suggestion.

 

[Edfox023]

Also, does anyone know where you can purchase D-shaft inserts like this?

It would be used inside of a knob for a stove, or radio possibly.

I could not find anything like it on McMaster-Carr or anywhere on the web.

 

[looslib]

I did a quick google search on "d-shaft knobs" and found lots of places to order them.


"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[Edfox023]

I'm not looking for knobs, I'm looking for inserts like in the picture I posted. Thanks anyways.

 

[btrueblood]

Funny, I got "D-profile shafts" by entering "shafts" as a search term in McMaster -->

http://www.mcmaster.com/#precision-shafts/=l2rik1

Flatted shafts would be an alternate search term. Also look in Boker's catalog, they should have smaller od shafts than the 1/4" ones in McMaster.

 

[Edfox023]

I must not be explaining myself clearly or using incorrect terminology. I'm not looking for a knob or a shaft. I'm looking for an insert that is a female version of a d-profile, that could be inserted into a circular hole to give me a female d-profile.

 

[MintJulep]

http://www.lectra-fasteners.com/catalog.htm

 

[btrueblood]

Sorry, the second picture you posted never showed last time I read this thread.