[MachineShop] New Safety Check for South Bend Lathe

[Denis Muradov]

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> 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> 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> 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
>> > --
>> > Machineshop mailing list
>> > Machineshop at quelab.net
>> > http://pepper.quelab.net/mailman/listinfo/machineshop
>>
>
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