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Re: sketch serrations
It sounds like circular saw blade specs. Serrations would be the material cut out to form the teeth.
# of teeth: 99 (Total number of teeth around the diameter.)
pitch: 16/32 (Point to point distance on the points of the teeth. Measured in 32nds so it's really 1/2")
Nom Pressure angle: 45 (I believe this is the angle relative to center on the cutting edge of each serration.)
Pin Diamter: .120
Number of pins: 2
Pin measurement: 6.3965 +/- .0005
(Not sure this could be some form of locking mechanism for the saw. I know some smaller grinding wheels have 2 holes or pins depending on manufacturer to lock it onto the axle to prevent it from spinning loose from the machine.)
I'd first extrude a disc with the OD and then use an extruded cut to make a single serration. After that I'd use circular feature pattern of 99 instances.
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Re: sketch serrations
Joesph,
Any way you could post the drawing so I can get a better idea of what it is for? Sounds to me like some sort of gear data.
Chris
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Re: sketch serrations
I probably cannot post the print for confidentiality reasons.
I have created the serrations. After looking at the pitch between them something isn't right. I find the pitch to be 0.200'' instead of 16/32''. I used the circular pattern with 99 features. The pin measurement means the center of a pin of 0.120'' diameter coinsides with the 6.3965''. They never called out any root diameter so my serrations come to a point.
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Re: sketch serrations
From everything I have ever seen the pin dimensions is the dimension over the outside of the pins.
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Re: sketch serrations
Yes you are correct Christopher. I changed the drawing to reflect that. My pitch is still incorrect with 98Teeth.
I can't figure out why just yet. The pitch is just around 0.200'' from one.
See the updated serrations below
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Re: sketch serrations
98 cuts would be 99T but the pitch 16/32 isnt' correct yet. I can't seem to generate the correct pitch with the given data.
any ideas?
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Re: sketch serrations
The pitch has to be measured on the pitch diameter or it won't be correct (but it appears they didn't supply a pitch diameter for you).
The pin measurement is the OD measured if you put pins in 2 of the grooves on opposite sides (as if you measured with a set of calipers on the outside of those pins).
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