Keys to Success with your Longworth Bowl Finishing Chuck
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I am actively looking for distributors inside and outside the USA. I have recently changed suppliers and now have the ability to drop ship directly to your location worldwide at significantly reduced freight rates allowing for reasonable margins on the New Longworth Chuck. If you are a stockist in the UK, or a retailer anywhere and you would like to offer the New Longworth Chuck for retail sale to the public, please contact me for information.
Club buys 10% discount for 10 or more. Ask for info
I introduced the new chuck at the AAW National Woodturning Symposium in Hartford, Ct. in June, 2010.
The New Longworth Style Chuck is available in nominal lathe sizes to fit most modern wood lathes: 10", 12", 14", 16", 20" and 24" with prices beginning at approximately $139.95 plus shipping.
How To Order Your Longworth Chuck:
The modern version utilizes a steel disk approximately 3/8" thick for mounting. This disk is easily gripped by #2 jaws (optional 4" disk available for use with #3 jaws). It is extraordinarily easy and quick to mount and costs about the same as a quality set of Cole/Bowl jaws with similar capacities. Imagine, no more changing chuck jaws or moving buttons.
There is a dovetail groove to accommodate Nova Chucks and Vicmarc Chucks as well as OneWay type straight jaws. I haven't found a chuck yet that the Longworth would not fit.
The New Longworth Style chuck uses soft rubber buttons which are longer than most others. They gently compress and will not mark or deform your turned piece. Intended to hold your item securely while finishing the bottom, the recommended maximum speed is 600 rpm.
To request more information and prices, scroll down. You may request a PDF copy of the instructions for the New Longworth Chuck here.
Example: 16" Longworth Chuck will clear any lathe indicating a swing of 16". The chuck is actually just less than 16" (approximately 15-3/4"). You may also use it on a Powermatic 3520 with a 20" swing, but not a Jet 1442 which will only swing a 14" chuck. A Jet 1642 will be fine.
12" Longworth Chucks will fit all lathes with 12" indicated swing.
All Modern Longworth Chucks have very soft tapered buttons which will not damage your bowl. They expand as you tighten each wing nut. We strongly advise that you utilize the tailstock against the vessel as long as possible when using your Longworth Chuck. 1) This will trap the bowl so it doesn't fly out and shatter, 2) It will eliminate any possible vibration giving you a smooth cut, 3) Best Practices dictates for safety that you engage the tailstock whenever possible.
Remove the tailstock when finishing the last little bit in the very center and for finish sanding. At all other times, use the tailstock.
This means that if you have a lathe with a pivoting head, that you must work over the bed to utilize the tailstock. Think of a Jet 1442, or a Nova DVR300, etc.
|I have moved Longworth Ordering to my new web site. Please click here for current ordering information:|
|Gripping Specifications (Approximate - Actual will
depend on your 4 jaw chuck)
For all 20" & 24" Longworth Chucks with the 4-1/4" mounting plate, dovetailed jaws are required for use in your 4 jaw woodturning scroll chuck in order to hold your Longworth Chuck safely. Using the dovetail groove in the 4-1/4" mounting plate is important in achieving the proper grip. Remember that all woodturning chucks hold tightest when almost fully closed.
|Nova Titan Chuck.
I recently received the following letter regarding the 20" Longworth Chuck and the proper jaw set.
I use the 128mm jaw set part #vo677 with my 20" Longworth Chuck and it is perfect.
Oneway Stronghold Chuck Smooth Jaws (dovetailed).
Information pulled from the Oneway website
Smooth Jaws with
dovetail (not "Profiled" style jaw)
Longworth Chuck Suggested Tightening Sequence
1) Finger Tighten each button bolt assembly off the lathe using this sequence to maintain concentricity.
2) Mount the Longworth Chuck with vessel into any typical 4 jaw wood turning scroll chuck installed on the lathe per instructions.
3) Take three full turns (6 half turns) on each button. Over-tightening will result in split buttons.
4) Bring up the tailstock against your vessel to eliminate any vibration and leave it there until you have just a small nub at the center.
5) Back the tail stock away and carefully remove the nub. Sand and finish per usual on the lathe.