[MachineShop] New Safety Check for South Bend Lathe

[itsunclebill at gmail.com]

At Quelab, we don’t have people using our equipment as part of a full-time occupation.  Sometimes even things can get overlooked.  I think a startup checklist for each machine, posted at the machine, would be a great thing.

 

From: Machineshop <machineshop-bounces at quelab.net> On Behalf Of Denis Muradov via Machineshop
Sent: Saturday, March 16, 2024 10:35 AM
To: John P Anthes <jpanthes at comcast.net>
Cc: Denis Muradov <denis.muradov at gmail.com>; MachineShop Information list <machineshop at quelab.net>
Subject: Re: [MachineShop] New Safety Check for South Bend Lathe

 

I checked the two four jaw chucks. They both have the same four bolt pattern style. The spacing is ~4.12" on one and ~2.81" on the other. I have attached a picture of the bigger one. 

 

 

 

On Wed, Mar 13, 2024, 6:55 PM Denis Muradov <denis.muradov at gmail.com <mailto:denis.muradov at gmail.com> > wrote:

We have two four jaw chucks with nothing on the back. I think they have plain backs? I will double check.

 

On Wed, Mar 13, 2024, 5:13 PM John P Anthes <jpanthes at comcast.net <mailto:jpanthes at comcast.net> > wrote:

Wow! Sure am glad you learned of this situation Denis.
Honestly, I cannot imagine how this happened?

Untrained users?

I’ve spoken a few time of a 4-jaw chuck. But we never located one? I do rather recall having one at sometime?
And I don’t recall a collet chuck available that would substitute for the 3-jaw chuck?

I just don’t get it. But and pleased that you discovered the concern.
THANK YOU!

John Anthes
Sent from John's IPad Air

> On Mar 13, 2024, at 6:28 PM, Denis Muradov via Machineshop <machineshop at quelab.net <mailto:machineshop at quelab.net> > wrote:
> 
> 
> Today while, Mr Ford was working on the backlash problem, I decided to take the chuck off. It turned out that the camlock position screws were in the open position, except maybe for one which was halfway. This could have caused the chuck to come off during operation. This might explain the parallelism issue some users ran in to during training. 
> 
> From now on, whenever using the lathe, double check that the camlock screws are in the locked position. Take a look at the picture for the correct orientation. More permanent labeling will need to be done in the future.
> 
> I will update the training documentation with this step in the future. 
> 
> Thanks
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