My astronomy project:
4, New timing belt and pulleys has arrived:
Always exiting when new parts arrive, will they fit?
Not sure about that, I couldn't get exactly what I want, just close.
Timing belt and pulleys:
I got the correct parts I ordered and they look good. But there is one thing, the 60 teeth pulley was a bit wider than I expected, the teeth is 10 mm wide not 7 mm. There was no information about the size of the width more then it fit 6 mm timing belt. I have wrote to them and asked if it was the correct pulley I got.
Now I got the answer, it's correct, I just misunderstood. I have to do some machining work anyway, just a little bit more to do.
16 teeth pulley:
The small 16 teeth pulley is just a bolt on work, but the locking screws is hidden by the frame. Not a big problem.
60 teeth pulley:
This maybe cause more or less work to fit. The 60 teeth pulley is too big to fit, which I already know when I ordered it.
Some machining needed.
First I check with the original spur gear which maximum hub diameter I can have. It's now 20 mm plus a margin of 4 mm. The drill's size is 2 mm and just fit between the spur and the chassis. To be on the safe side, maximum diameter I can have is 23 mm.
The 60 teeth pulley's hub has a diameter of 29 mm, need a lathe to take it down. Any problem? Yes, I don't have a lathe but used to have it from my earlier works.
The width of the teeth is 10 mm, I have to take it down to 7 mm.
In this space the hub length must fit, 16 mm.
The overall length is 19 mm, 3 mm will be cut from the teeth, need to take away one more mm on the other side.
Now I must think about these machining needed to be done and plan before I start machining the pulleys.