Hi all
I have in my possession a handle that is too short and I would like to have an extension cord made,
I drew this turning part in pj, but it looks rather boring to me to do (and expensive) with 2 flats (to screw on one side and 2 on the other to avoid the rotation of the wedge). How could I optimize/ facilitate the manufacture of this part?
Thank you in advance for your help
Cdlt
Hello
I can't open this version of the part so I can't see it from every angle, but I would say that the most annoying to machine is the inner hole with, I guess, the flats to slide and block the handle rod. If you want this version, I think that the outer flats are not useful.
An alternative that is easier to machine and probably much cheaper; tapping. By tapping the hole in the workpiece, and threading the handle rod you avoid flat spots. The outer flats are then useful.
Another possibility, a simple hole without flats for the rod, but create perpendicular lateral threaded holes crossing the inner hole, to screw in screws without heads (or even with heads if it doesn't bother) (as to hold a coupling sleeve on a motor axis, see illustrations) which will then act as internal flats. The external flats are then useless. If these side holes complicate feasibility and increase the cost of machining, you can make them yourself at home afterwards.
First of all, the flats on the handle side are duplicated with those on the wedge side which will be enough to screw the handle.
If you can touch up the wedge, I would drive a pin radially into the extension and make a hole in the wedge.
As a result, there is no need for a flat spot, possibly, to ensure tightening, add a radial hole in the middle of the extension to slide the shank of a screwdriver into it for example.
Hello gentlemen,
First of all, thank you for your help!
stefbeno : I'm going to take inspiration from the "hole" trick for clamping the part, indeed much simpler than flats, on the other hand modifying the shim will be more complicated, I have the possibility to weld it directly to my axis... It could be even simpler!
Cdlt
