Finding Center distances for surplus Spiral Bevel Gearset
Finding Center distances for surplus Spiral Bevel Gearset
(OP)
I'm building a prototype using a re-purposed spiral bevel gearset from an angle grinder.
I'd like some advice on the best methods to:
A) determine the center distances
B) estimate the torque capacity
No, I don't have the original angle grinder that the gearset was designed for, and specs from the manufacturer are not available.
I don't really want to go through a full reverse engineering or digitizing to determine the PD, tooth form, etc. At this stage I want only to design and build a quick but durable proof of concept prototype.
To find the center distance I've considered making an adjustable bearing block (3D Printed) and then running it at a range of speeds under no load to experimentally determine the center distance that seems smoothest / quietest.
Is there a rule of thumb for engagement / offset between gears from their fully contacted meshed position
Suggestions?
I'd like some advice on the best methods to:
A) determine the center distances
B) estimate the torque capacity
No, I don't have the original angle grinder that the gearset was designed for, and specs from the manufacturer are not available.
I don't really want to go through a full reverse engineering or digitizing to determine the PD, tooth form, etc. At this stage I want only to design and build a quick but durable proof of concept prototype.
To find the center distance I've considered making an adjustable bearing block (3D Printed) and then running it at a range of speeds under no load to experimentally determine the center distance that seems smoothest / quietest.
Is there a rule of thumb for engagement / offset between gears from their fully contacted meshed position
Suggestions?





RE: Finding Center distances for surplus Spiral Bevel Gearset
Also make sure that the mounting distance that you chose allows for backlash and a contact mark that favours the toe (when not under load).
You would need to reverse engineer the set to determine the load capacity.
Having said that; go to a hardware store and look at all the similar gearboxes there. Chose the one that closely resembles yours. Look at the tool's speed and power ratings.
That should give you a very, very rough idea.
Ron Volmershausen
Brunkerville Engineering
Newcastle Australia
http://www.aussieweb.com.au/email.aspx?id=1194181
RE: Finding Center distances for surplus Spiral Bevel Gearset