For those of you who utilizing a coring system, what do you consider the minimum HP motor to do so effectively? thank you...John
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Coring?
- Thread starter John Grace
- Start date
Donna Banfield
TOTW Team
When I used coring systems, (both McNaughton and Oneway), I was on a Oneway 2436, 3hp. And I could easily stall that motor if I was being too aggressive. I have heard from others that a bare minimum was 1.5 hp, but more was always better. If I was coring anything above 12" diameter, I would want at least 2 hp.
I core with one way system on my Jet 1642 1 1/2 hp. It gets the job done.
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I was just coring this ash blank on my PM3520 C today (just posted on the “What's on your lathe” thread). I believe I’ve got a 2 hp motor, which did stall out a couple of times, taking about a 10” core.
BTW, just noticed that you’re a fellow Baltimorean John. Welcome!
BTW, just noticed that you’re a fellow Baltimorean John. Welcome!
Thank you all...perhaps my over-all problem is a bit impatience.
Depends on your definition of “effectively” - each person will have a different definition. I can core more effectively - quicker - on my Nova Galaxy vs my club’s Jet 16x42 due to higher power at lower rpm’s (400-600rpm) of the dvr motor. Also the pivoted type coring tools (oneway and woodcut) will use a bit less power vs a mcnaughton, due to more binding of the latter.
Started coring with the Macnaughton on a Jet 1642 1.5hp - as mentioned, works fine, learned to have patience. Moved up to a Robust AB - 3hp, still practice the patience and still rewarded with a squeal when I forget. Both work, 3hp works a little quicker, both work better with a freshly honed tool.
I have a woodcut two blade system, my lathe is 1 1/2 hp. It will cut a core from 12" od to 4" od. I can stall the lathe if too agressive. Just take my time and make sure the blade is sharp. Takes about 4 minutes to core a blank More hp would be nice but you work with what you have.
You "can" core with a 1 hp motor, but it is difficult and requires a lot of patience. My preference is for 1 1/2 hp and 220 volt. I tried coring on a Jet with the 1 1/2 hp motor that ran on 110. It was a royal pain...
robo hippy
robo hippy
I have a Oneway 2436, 3 HP, core on low gear usually 300-400 RPM, using Korpro. Hard to stall with this setup though given enough pressure you probably could but that would be way too aggressive a cut.. Agree with others, larger cores take more HP.
I have a 2HP motor and used a Oneway bowl saver to produce several cores. Did it work? Sort of...just painfully slow.
I core with a oneway system on a Powermatic 3520b. It works but does stall the lathe if I get aggressive.
The original coring tip from Oneway is to me the worst design out there. This is why the corepro is so popular because it cuts so much better. For coring, you need to be in the low speed range for the added torque that is needed. If you try to core in high speed range, the older motors especially, don't like the extra umphf needed. If you have a lathe with 3 speeds, then mid speed range works just perfectly.
robo hippy
robo hippy
I have a 3 hp Robust AB and a brand new OneWay coring system with the Hunter Korpro cartridge and cutter. Successfully cored a couple 20" big leaf maple blanks last week but was reminded by an occasional belt squeal to take it slow and clear the chips frequently.
I cored on my old Delta 450 with a 1 hp motor. The size of the bowl, the size of the coring tool The type of wood are all factors. Cutting and winding the groove will help, but you may only get two bowls. Also dry versus wet woods plays a large role. Patience, sharp tools and a practiced technique will lead to success.
Exactly why I'm on the look-out for a Robust later this year. Trying to be patient and hoping to find a used one but must have the 3HP motor.
I have a spray bottle filled with WD-40. i spray it into the grove occasionally with the tool in the grove And lathe running, but not cutting. The wood absorbs the oil and chips exit better. I‘ve also notice less noise when it’s applied. I’ve not notice any residue on the cored bowls
I’ve used the Oneway Easy Core on 1.5 hp lathes for years with no issues. A fresh edge and light touch + clearing chips frequently = no problem at all.