• Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.

How would you go about..

DPittman

Ultra Member
I'm not sure I have the capabilities yet but I'm wondering how a fellow would go about remaking this thing. It is is a curved gear rack that engages with a gear as the rack passes over in an arc.
20220918_144827.jpg
How does one cut teeth on an arc?
 
It was probably stamped I would think.
Shaper and a dividing head comes to mind or Cnc with a small endmill perhaps?
 
It was probably stamped I would think.
Shaper and a dividing head comes to mind or Cnc with a small endmill perhaps?
Yes I think it was originally stamped as it consists of two pieces sandwiched together.

I guess it is essentially an internal gear.
 
Last edited:
Fairly easy approach. Trace your arc of the gear on a blank, punch, drill, then trace the good gears onto the blank and cut with a vertical band saw, finally file or grind to final finish.

This not super precision work, just something that needs to mesh with reasonable accuracy.

So its well within your skills and even simpler tools, just don't over think it.
 
I'm not sure I have the capabilities yet but I'm wondering how a fellow would go about remaking this thing. It is is a curved gear rack that engages with a gear as the rack passes over in an arc.
View attachment 26639How does one cut teeth on an arc?
If you have access to a mig or tig I would just build up the worn ones and grind and file to final shape. A cut off wheel and triangular file and, Bob's yer uncle.
 
Back
Top