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Thread: The great chuck runout debate
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21st July 2009, 12:20 AM #1
The great chuck runout debate
There has been a mass debate recently about chucks, adaptors and the amount of acceptable runout. Just for the hell of it I checked out my four chucks and adaptors. Attached is a boring 15 minute video of how I went about it. I left the setup of the first chuck complete (without editing), but edited the other 3 setups to keep the file size down, and to save peoples sanity. I forgot to reset the camera to capture the runout on the face of the first Vicmarc adaptor but it was <0.00025" (believe me, I work at Bunnys )
The chucks tested were:
A reasonably new (3 month old) Vicmarc VM120 with Vicmarc adaptor
A 5 y/o VM120 with VM adaptor
A G3 ~3 y/o with a T/Tool adaptor
A GPW 100 mm chuck (purchased at last years Melb. WWW show) with supplied adaptor.
In the washup I think the GPW chuck came out the best, and it was the cheapest .
Good news/bad news, I couldn't get the file to upload as one big file so I had to split it into 5 smaller files. Good news if you find it boring, bad news is it breaks the continuity. Anyway enjoy .To grow old is inevitable.... To grow up is optional
Confidence, the feeling you have before you fully understand the situation.
What could possibly go wrong.
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21st July 2009 12:20 AM # ADSGoogle Adsense Advertisement
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21st July 2009, 01:18 AM #2
Ooley dooley you've been busy
Inspiration exists, but it has to find you working. — Pablo Picasso
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21st July 2009, 06:30 AM #3
Hell, John....of course there won't be any runout, you guys are smack dab in the middle of winter and the metal has contracted (you know "shrinkage") so much there can't possibly be any runout
Seriously, the blues in the background added a lot to the vids...made the time bearable
Well, looks like you've got four well machined chucks and inserts...take it that the GPW is a local manufacturer chuck, don't think I've heard of it here in the states.
I'm still waiting to hear back from Craft Supplies about the Super NovaCheers,
Ed
Do something that is stupid and fun today, then run like hell !!!
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21st July 2009, 08:45 AM #4GOLD MEMBER
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just thought i would mention its that the blues in the background makes the file a lot bigger .
not complaining just explaining .
interesting by the way
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21st July 2009, 09:13 AM #5
Sorry Ed, I had to remove some of your smilies. Couldn't upload reply........ too many images in post
G'day Ed, it may be the middle of winter here but there was still plenty of thread clearance on all the threads, except for............. you guessed it, the G3 . Glad you liked the background music, prolly made the vids bearable. I gave up the commentary after the first chuck because it was pretty self explanatory what I was doing. The GPW is a cheap Chiwanese knock off that sells for AU$215 including 4 jaws sets and adaptor.
I hope everything turns out for the best with your Super Nova saga.
Thanks Texx, I new the music added to the file size. There's almost as much debate about what music we listen to while turning, but that's been covered in another thread.Last edited by Grumpy John; 21st July 2009 at 09:15 AM. Reason: Image issues
To grow old is inevitable.... To grow up is optional
Confidence, the feeling you have before you fully understand the situation.
What could possibly go wrong.
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21st July 2009, 09:59 AM #6
John well done a variety of chucks and adaptors music wasn't to bad (not a real blues fan)
I see the largest runout on the G3 as being almost 9 thou is that chuck pre-Chinese or post.
Ray
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21st July 2009, 10:16 AM #7
Ray, from memory I think I bought the G3 new about 3 years ago. I'll see if I can dig up the receipt. Does that make it a Chinese one?
To grow old is inevitable.... To grow up is optional
Confidence, the feeling you have before you fully understand the situation.
What could possibly go wrong.
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21st July 2009, 10:43 AM #8
If a chuck has .009" run out on a wood lathe, I reckon thats tolerable. At the end of the day we are free hand turning and after we have run our sand paper over the job to finish and especially if you power sand. I suspect most turning jobs will have that and more on the run out.
For me such details are only an indicator of how well they are made and I do note sloppy machining usually means the whole tool is under par.... or worse The turner has to and will work around these little challenges.
I have 5 SN2 chucks and have no idea if and or how much they run out. It has never occurred to me to check, also cant find my darn dial gauge indicator.Inspiration exists, but it has to find you working. — Pablo Picasso
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21st July 2009, 10:53 AM #9
No don't think so John they only went there in the last 12 months.
Hughie looking at Ed's video his was visually wobbly John's I could only see one that had out chuck wobble visually so minor hardly noticable
A mate who's a Tool maker fitter machinist was saying after watching Ed's video that even Machine lathes have this problem from time to time some times caused by line up of threads when putting them on so they just remove and try again
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21st July 2009, 11:01 AM #10
Ray ,
Yeah I find that a little run out is not that much of a problem. But when there is run out you can usually find more sloppy work else where on the item and its often serious. ggrrhh!
I have got some bits that might be useful for your rose engine.Inspiration exists, but it has to find you working. — Pablo Picasso
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21st July 2009, 11:04 AM #11
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21st July 2009, 04:56 PM #12GOLD MEMBER
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Seems to confirm my hands-on observation that the (my) GPW is at least as good as the (my) pre-Chinese Supernova2. So much for the anti-Chiwanese bias.
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21st July 2009, 06:44 PM #13Senior Member
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I believe the GPW chuck is marketed in the US under the name Barracuda 2.
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21st July 2009, 07:19 PM #14
Well John i watched it this morning and the first thing i thought was You need to get a life or more hours at Bunnies,
But then again you have shown some serious information on how to check all the different bits so well done John
Not dure that it will increase sales for any one thoughregards
David
"Tell him he's dreamin.""How's the serenity" (from "The Castle")
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22nd July 2009, 12:05 PM #15Cheers Huon
Largest range of Dayacom pen parts in the southern hemisphere.
Why pay more? When the best costs less! www.garypye.com
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