Coring system for lathe with almost 32" swing

[Pete Danielson]

I have a lathe with nearly 32" swing and was looking at the Oneway coring system, but it only accommodates lathes up to a 26" swing. Is anyone familiar with a system that would work with my lathe?

I do metal work as well so I'm comfortable fabricating/modifying an existing system to work, just not sure exactly what's involved or what issues I need to be aware of since I've never used a coring setup before.

 

[Richard Coers]

Just fabricate a spacer system to effectively raise the Oneway bed mounted parts up so it is on center. Remember that torque goes up exponentially as you get further away from the center line.

 

[Pete Danielson]

Making a riser block was my initial thought. I reached out to oneway to ask about that, but haven't heard back. Another supplier I contacted advised against doing that so I didn't know if there was some potential issue I wasn't aware of. Probably just a liability issue.

 

[Paul Paukstelis]

I have a lathe with nearly 32" swing and was looking at the Oneway coring system, but it only accommodates lathes up to a 26" swing. Is anyone familiar with a system that would work with my lathe?

I do metal work as well so I'm comfortable fabricating/modifying an existing system to work, just not sure exactly what's involved or what issues I need to be aware of since I've never used a coring setup before.

Is it a "true" 32" swing lathe, or something like the Rikon that has a sliding bed? If is a sliding a bed, you want to get the system that fits your smallest swing, not the largest.

 

[Pete Danielson]

It's a German lathe made by Hapfo, no sliding bed. The spindle height is @ 403mm so the swing is about 31-3/4.

 

[robo hippy]

You might have to make your own, especially if you are going any where near that bit. I know New Holland Bowl mill has a coring system for bowls that size, and Ronald Kane from Holland had one made Other than that, Oneway is stable all the way to the end of the biggest core you can remove.

robo hippy

 

[Dean Center]

It seems to me that the additional height will substantially add to the stress on the coring rig due to the longer lever arm. Simply raising a factory made rig won't take that into consideration. The guys at Oneway had to consider that when they made their taller set ups. I bet they would enjoy the question and be happy to give you their experience, maybe even their calculations. The base components of a Oneway coring set up aren't very complicated, so fabricating something with larger base plate/clamp blocks and/or increased diameter supports to hold up the standard knives wouldn't be too hard, if you have metalworking ability.

Oops. Hadn't thought about making a 28" core and the knife needed. I'd have no clue about the knife part of making your own if you're going to max out the size of the cores. What would somebody do with a 27" bowl???

 

[DON FRANK]

If the goal is to use standard coring knives from oneway then fabricating higher riser bars will do that and do that safely. Use heavy walled tubing the correct I/S diameter and weld gussets to the base because of the raised height. My lathe is 26" spindle height and it works fine.
If the goal is to be able to core bowls larger than the #3 or #4 knives i would rethink things. I would not want to try to fabricate larger knives from a safety issue.