How to Rebuild a Jacobs Chuck - when a well-cared for machine from a legendary company like Monarch shows up on the market, action is required. When a Millwright, also legendary, took action - even better. The Monarch-Millwright Era has ... bit.ly/38pUIZi
begun.
Timestamps
0:00 Finding a Chuck
2:10 Grease Zerk
3:32 Arbor Removal
5:05 Sleeve Removal
6:04 Reassembly
You can't just put ANY TOOLING on such a machine. All your tooling must function well and be a part of the experience. If all goes well, there will be a future day when the 20N gets installed in the "AA" 14", the chips curl back down the flutes of a sharp bit through some Anchor-Lube, and Stan will smile.
Refurbishing the 20N Jacobs Chuck - 100% Decades of collecting for "some-day", the excitement of a "new lathe", the dawning of the new Monarch-Millwright Era drove me up to the attic in search of a 20N - (presumptuously) most would agree it's a perfect fit.
The 20N Jacobs Super Chuck is the biggest of them all. Designed and patented as early as 1902, it is definitely a period-correct chuck for the "AA". Massive headstock gearbox, ample way surfaces along with a Morse-Taper 4 tailstock the "AA" has some amazing capability and the old-style 20N will open up the "Big-End" of her operating envelope. For some history
bit.ly/3pXsHOD
The Monarch "No Obsolescence Tolerated Here" slogan comes from The Monarch Machine Tool Company advertising materials. For those that know, Monarch is the high water mark of manual lathes. The attention to mechanical detail is an essential element with hardened and ground helical gears in the headstock, reliable, rigid and solid design. The original company was founded in 1909 as the Monarch Machine Tool Company. Located in Sydney Ohio. The lathe that will mate with the 20N was made in 1940, possibly the zenith of the companies existence.
Nothing but MADE IN AMERICA for Stan.
Tools & Parts (mfr) ::: Cost & Country
1) Tap Handle GTD ::: Collected Unknown & 100% MADE in USA
2) Hammer* ::: Priceless & 100% MADE in USA
3) Pin Punch -Starrett ::: Collected Unknown & 100% MADE in USA
4) Lincoln Grease Gun** ::: $150 ish delivered & 100% MADE in USA
5) Arbor *** ::: eBay & Veteran Owned
6) Service Ring**** ::: 100% bit.ly/38pUIZi
* From my Fathers Farm - Drove 2000 miles one-way to get it and a Hay Budden Anvil, (would drive further and do it again in a sec)
**HP Grease Gun (ebay.to/2KvGzAx) Lincoln an Original US company - hard to tell if currently made in USA-not marked en.wikipedia.org/wiki/Lincoln...
*** Veteran Owned USA
****Service Ring
bit.ly/38pUIZi
leave it by the press-you will be glad you have it
Filming
It started in the mezzanine(attic) of a friends shop because of a storm and we had no lights. The green hue in the first part of the video is from a skylight so we could film indoors. We charged the camera batteries from the inverter in my truck. Outside it was raining.
The next day was windy and it was all filmed outside again for the best light. Those Deadcat mic's really work. The idea had to be documented I was going to make this video regardless of any constraint.
UPDATE June 2021 BASH: The 20N fits securely in the tailstock of Stan Zinkosky's pinstriped "Black Betty" and was performing for everyone at the BASH.
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