Primary Drive Sprocket Peg Holes

  • Thread starter Thread starter Reggie3cl
  • Start date Start date
R

Reggie3cl

Guest
I'm fooling around with a design for holding the front primary drive sprocket, but I want to double check the distance between the centres of the peg holes.  I make it 52mm, but it's difficult to measure with the equipment I've got as the shaft gets in the way.

Anyone got a loose sprocket the could measure for me?

Reggie
 
Sorry Reggie. I was going to measure one for you but I forgot. Evidently my memory has one of those stupid Microsoft auto-archive functions  ???
Don't forget to make the hole in the middle of your sprocket holding tool big enough for a 32mm socket. Some sockets are thicker walled than others.

Cheers,
Cam
 
Not a problem lad.

Still kicking round ideas with my designer mate.  I wanted something that we could knock out on a CNC machine perhaps with a choice of handles-a long one line Steve's or one that bolted to the crankcase like Wagner's cut on a water jet machine.  Anyway, we'll see how it goes.  I have specified a clearance of 43mm for the socket as measured from the one in my toolkit...

NutMRD.jpg


Reggie
 
You can save yourself a load of machining money and make a stronger component by making that a simple full circle with two pegs in it. You are losing a bit of advantage with the design you have as the tool will not sit snug against the sprocket, it will be held off by the chain which may encourage it to tip under load.

  Keith
 
Yeah, that was my original brief, bloody designers having original thoughts. I've told him the handle has to clear the chain and that it should be flat ideally.  So what do I get, a round handle and a horseshoe.  Brilliant.  Anyway, I'm seeing him this weekend so will sort it out properly.

Reggie

 
You must log in or register to reply here.
Back
Top