HI rstermer
I'm a user of cams ,,, I have made many,many of them... from 1/2" dam. to 2" dia. and from from 1/2" high to 1 1/4" tall , I have made them with a hole saw and using dowel rod, by the way dowel rod works the best..
,,, most of the holes are just off the edge of the dowel ,to get the max caming action out of them..
They work better than the wedges in most jobs..
I have but sand paper on some and that helps hold them in place or to say hold the stock in palce.
I also drill all the holes the same so I can use the same allen screw with them all/most...it's a 10-24 x 1 1/4" allen cap screw...
But I also use sq.drive dry wall screws when I need to...
I use a stop block on the chop saw so they all come out the same, the norm is 8 of each size..
Thumbs up on the cams
Hope this helps..
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Originally Posted by rstermer I've seen a number of thumbnails posted on the forum of cams set up to hold material in place and was wondering if those who have made cams for that purpose could share their knowledge. How does one decide on how much to offset the pivot point from the center of the circle? What material should be used for the cam and the pivot? Any paticular diameter for the pivot pin? When is it best to add a lobe to the cam and what are the design criteria for lobed cam? Do you add a friction surface to the cam face? If not, how do you get it to lock in place? What other considerations are important? Thanks for your thoughts.
rstermer |