Jet 1014 Tail Stock Locking Failure

[ROOKIETURNER]

I purcahsed a jet 1014 about four weeks ago. I have had no problems with tightening the tail stock. Today I went to finish a few blanks and as I turned the lock on the tail stock it came to the point of locking down and then gave way and turn 360 degrees. I tried to tighten again and the same result. I turned over the lathe and saw the nut that secures the locking pin. I grabbed a socket, marked the nut position with a marker against the bolt and turn 1/4 turn. The nut moved in orientation with the bolt, but did not thread up any further.

I pulled the ring clip that holds the locking bar, pulled the bar and pulled the locking pin, and found this. The nut gave way and is now cross threaded. Anyone else experience a failure of this type?

 

[RAdams]

Get ahold of Jet (WMH tool groups is what it used to be called). they will likely replace the proken parts with little issue.

 

[holmqer]

I purcahsed a jet 1014 about four weeks ago. I have had no problems with tightening the tail stock. Today I went to finish a few blanks and as I turned the lock on the tail stock it came to the point of locking down and then gave way and turn 360 degrees. I tried to tighten again and the same result. I turned over the lathe and saw the nut that secures the locking pin. I grabbed a socket, marked the nut position with a marker against the bolt and turn 1/4 turn. The nut moved in orientation with the bolt, but did not thread up any further.

I pulled the ring clip that holds the locking bar, pulled the bar and pulled the locking pin, and found this. The nut gave way and is now cross threaded. Anyone else experience a failure of this type?

I had the same problem with my Jet 1220. There were a variety of contributing factors.

1) The threaded portion of the bolt was too short, the threads did not extend past the nut. Whether this is a design flaw or a manufacturing defect, I don't know.

2) The bolt was of a low grade steel

3) The clamp block is circular, thus requiring excessive tension on the bolt

My solution

Made a new cam bolt that is 1/4" longer from 303 Stainless

Made a new square clamp block out of 2"x2"x3/8" CRS. This clamp block offers a 4x mechanical advantage in clamp force for a given bolt tension.

The tail stock now locks solid with one finger on the handle.

When I get home, I'll take a picture of it.

 

[randyrls]

If it is only 4 weeks old, I'm sure Jet will just ask for your address and send you the parts.

The tail stock clamping washer is undersized and has too little area that contacts the underside of the lathe ways on this lathe. Tail Stock creep is an issue some have had while drilling. I had that same problem and replaced the clamping washer with a square one that is the same size as the tail stock base. That puppy locks down SOLID now!

I believe some one here in the group sells these for a nominal price.

 

[markgum]

yup, give JET a call. They seem really good on customer service.

 

[EBorraga]

I had that same problem and replaced the clamping washer with a square one that is the same size as the tail stock base. That puppy locks down SOLID now!
I believe some one here in the group sells these for a nominal price.[/quote]


I'm pretty sure JohnnyCNC is the one who makes the square one.

 

[ROOKIETURNER]

UPDATE: Called Walter Meier's Customer Service, and within 10 minutes they sent me parts list, asked which parts I needed, and I should have them by Tuesday - Wednesday next week. So far, so good.

 

[Lenny]

That's good that they will send you a new one (as they should)!

Maybe they should talk to johnnycnc and learn how to make a good one from the get go! :biggrin:

I replaced mine before it was a problem and it's been an inexpensive upgrade.

 

[ROOKIETURNER]

ANOTHER UPDATE:


I did not want to wait till Tuesday to start turning, and my daughters think that their Daddy can fix anything, so I carefully cut the nut from the pin. And discovered that the nut's thread was intact, it was the bolts threads that sheared off.

I am an organized person, no comments Dave, but I do have a Misc Nut Drawer. So I fished through the drawer and found the rigth size and thread nut. I place the washer back on and since the threads were missing from where the nut used to be I knew that I would need to put a washer or two to fill the space in. I grabbed a locking washer and slide that on the bolt.

I then secured the pin in my vise between two boards and cranked down the new nut. Tightening and loosening until the bolt rethreaded. I then installed on the lathe and too my surprise it works, and even better than before. I can tighten it with one push and the tail stock does not budge at all.

I told the LOML that I may just keep it like this and just store the new parts until needed.

 

[CHICAGOHAND]

Good work my "organized" Brother.

 

[holmqer]

Here is the cam bolt and clamp block I made

Cam bolt is 303 stainless

Clamp block is 1018 steel