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Align head and tail on Jet JWL-1236?

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Forum topic by George M posted 07-25-2011 04:03 PM 2744 views 0 times favorited 17 replies Add to Favorites Watch
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George M

118 posts in 2232 days


07-25-2011 04:03 PM

I picked up a Jet JWL-1236 lathe off of Craigslist. It is in great condition, however the head pin and tail pin is off by about 1/16” side to side. It is right on up and down. I have read where people have adjusted the head to compensate for the side to side discrepancy. I cannot find a way to do this. Is it possible? If so how do I do it?

-- George, Parker Colorado


17 replies so far

View Bertha's profile

Bertha

13003 posts in 2160 days


#1 posted 07-25-2011 04:06 PM

Uh oh. I’d start by disassembling the tail stock & making sure the post and washer aren’t bent. Actually, if they ARE bent, that’s probably a good thing. Easy fix for a few bucks. Crank the tailstock plunger all the way out & check that too. Check the underside of the tailstock where it rides on the bed.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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Eric_S

1551 posts in 2663 days


#2 posted 07-25-2011 04:10 PM

DBHost did a good blog on aligning the Central Machinery version of this lathe. Perhaps it can help?

http://lumberjocks.com/dbhost/blog/22818

-- - Eric Noblesville, IN

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George M

118 posts in 2232 days


#3 posted 07-25-2011 04:33 PM

Bertha, checked all that already. Everything seems just fine on the tailstock.

Eric – Checked out that post. I can get it to line up that way, howeve the indexing pin is then on in. I was hoping there was a way to turn the swivel point slightly so that the indexing pin would have the headstock centered.

-- George, Parker Colorado

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Bertha

13003 posts in 2160 days


#4 posted 07-25-2011 04:38 PM

You might be able to tinker with the locking washer on the tailstock. I’m not sure if you’d want to. I’m kind of at a loss here. Does the pin look like it’s in the center of the tailstock head? maybe you just need a new insert? I’m kind of at a loss here. I’m not aware of any fine adjustment, but I only have a JET mini. Is your headstock permanently mounted onto the bed (I assume it’s cast together like mine). Maybe sloppy bearings in the headstock? Now I AM getting frustrated! :)

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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Eric_S

1551 posts in 2663 days


#5 posted 07-25-2011 06:49 PM

Unfortunately the CM version doesn’t have an indexing pin.

-- - Eric Noblesville, IN

View George M's profile

George M

118 posts in 2232 days


#6 posted 07-25-2011 10:25 PM

Betha,
I dont think it is in the tailstock. It slides in the rails and the only way to have it shift side to side is to start grinding the keyway – dont want to do that.

What needs to happen is to be able to turn the large “pipe – for no better word” that the head pivots on. Otherwise I just have to use the tightening screw to keep it lined up and not have the indexing pin seated.

-- George, Parker Colorado

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SCOTSMAN

5839 posts in 3052 days


#7 posted 07-25-2011 10:28 PM

Make sure you don’t have anychips under the chuck or tailstock.I know that sounds crazy but it can cause runout /or/ drift.Alistair

-- excuse my typing as I have a form of parkinsons disease

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Grandpa

3256 posts in 2143 days


#8 posted 07-26-2011 04:05 AM

The Jet 1236 has a head that indexes or swivels 90 degrees so you can turn larger bowls. the chuck or faceplate would be in the front. My question is this. Is the headstock locked in the exact position it should be? If it is off by a degree it would cause the problem you are talking about. Check this first.

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George M

118 posts in 2232 days


#9 posted 07-26-2011 04:45 AM

When the head is locked in the index, it is misaligned to the tail by about 1/16”. I have to pull the indexin pin out and rotate it that 1/16” and then lock it down in order to align the pins.

-- George, Parker Colorado

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dbhost

5609 posts in 2699 days


#10 posted 07-26-2011 04:51 AM

You guys beat me to pointing to my post… Yeah, no indexing pin on the Central Machinery version… Sorry…

-- My workshop blog can be found at http://daves-workshop.blogspot.com

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Grandpa

3256 posts in 2143 days


#11 posted 07-26-2011 04:52 AM

I think there should be an adjustment in this index for this purpose. I have a manual and it tells you nothing about this. it only describes assembly upon delivery. This is probably the place to look for an adjustment for this machine. Good luck and lets us know how you fix it.

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George M

118 posts in 2232 days


#12 posted 07-26-2011 04:07 PM

I thught there would be also, but cannot find one.
So far no solution other than pulling the index pin out and tightening the secure bolt when points are aligned.

-- George, Parker Colorado

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Grandpa

3256 posts in 2143 days


#13 posted 07-27-2011 05:52 AM

I haven’t had an opportunity to go look at mine. been really busy. I will try to check tomorrow (Wednesday) afternoon and see what it looks like to me.

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Grandpa

3256 posts in 2143 days


#14 posted 07-27-2011 07:48 PM

George, I looked at my lathe. I will admit that I was gifted with this machine. I have never swiveled the head on it. I checked and without dissassembling something I don’t see any way to make a positive adjustment fix on this. One thing I did notice is when I index the head and turn it back the alignment was nto exact. There is a little slack in this mechanism so I was able to pull it a little by hand and when it aligned I could tighten the locking lever. This is the lever below the speed control. This is all I could find. Maybe this is the only adjustment. I have talked to the Jet people in the past and I did keep their phone number. Call them at 1-800-274-6848. I am thinking they will want to help. let me know what you find.

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Bertha

13003 posts in 2160 days


#15 posted 07-27-2011 08:00 PM

The JET people have always been quick to help me. I wonder if the pin just earned some play over the years. I hope you get it ironed out. That’s a nice lathe.

-- My dad and I built a 65 chev pick up.I killed trannys in that thing for some reason-Hog

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