Universal Grinder Questions. Looking At Buying One Used

Terry Z · May 10, 2021

Good day. we are looking at a production job of molding 70A urethane on some aluminum hubs about 10 inches in diameter and a face width of 1.5 inches. The concentricity requirements force us to grind the tire O.D. The volume is too much to handle on an engine lathe with a tool post grinder. Would this be the best machine tool to buy to handle this work? I was thinking of a fixture in the chuck with a quick acting knob for mounting/dismounting the parts quickly. I have zero experience with this type of machine that is why I am asking. Are there ones to avoid and ones that are better to get? Thanks

Milland · May 10, 2021

Let us know what the production rate you're targeting is, as well as other issues (do you want a robot loader, any precision requirements, are you planning for fire risks, etc.).

With as simple a process as it seems, a purpose-modified lathe may work well for you. Removing the compound and adding a dedicated grinding spindle isn't hard.

DDoug · May 10, 2021

Terry Z said:
Good day. we are looking at a production job of molding 70A urethane on some aluminum hubs about 10 inches in diameter and a face width of 1.5 inches. The concentricity requirements force us to grind the tire O.D. The volume is too much to handle on an engine lathe with a tool post grinder. Would this be the best machine tool to buy to handle this work? I was thinking of a fixture in the chuck with a quick acting knob for mounting/dismounting the parts quickly. I have zero experience with this type of machine that is why I am asking. Are there ones to avoid and ones that are better to get? Thanks

How doo you fixture these to the lathe ?

why not a simple 2 axis CNC Gang style lathe with the toolpost grinder on it ?

Milland · May 10, 2021

digger doug said:
why not a simple 2 axis CNC Gang style lathe with the toolpost grinder on it ?

They probably could use more "grunt" than a typical toolpost grinder would offer, so my suggestion in post 2.

DDoug · May 10, 2021

Milland said:
They probably could use more "grunt" than a typical toolpost grinder would offer, so my suggestion in post 2.

Yes, you can get them quite large (toolpost grinders) IIRC Ox did mount a Setco Largish one on a CNC lathe.

The Gang style CNC lathes are simple, and give you plenty of room to fixture up the grinder. Along with having a power chuck/collet system for easy load/unload.

jwmelvin · May 10, 2021

Terry Z said:
Good day. we are looking at a production job of molding 70A urethane on some aluminum hubs about 10 inches in diameter and a face width of 1.5 inches. The concentricity requirements force us to grind the tire O.D.

I’m curious, will you tell me more about grinding the urethane? Room temperature? What wheel?

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Universal Grinder Questions. Looking At Buying One Used

Terry Z

Cast Iron

Milland

Diamond

DDoug

Diamond

Milland

Diamond

DDoug

Diamond

jwmelvin

Aluminum

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