Work Holding - How Not To Do It

[MrWhoopee]

Just a title Jeff . FWIW , I never knew we had a FB page either . Maybe they'll let me in !

I didn't either. I just clicked the Join button and I'm in. Not many members though.

 

[RaisedByWolves]

Not a problem that it is close to the ways. There is space.
Since he is removing the outer diameter, his work holding is not bad.
If he was facing it might be dangerous, but I have faced without having the material against the face of the jaws.

I don't find it to be a dangerous or how not to moment.

Disagree.

When that thing comes off of the chuck, and it will, it needs somewhere to go.

As tight as that is its likely to bind between the ways and the chuck jaws, and at that moment I do not want to be in the room, let alone operating the machine.

 

[woodchucker]

Disagree.

When that thing comes off of the chuck, and it will, it needs somewhere to go.

As tight as that is its likely to bind between the ways and the chuck jaws, and at that moment I do not want to be in the room, let alone operating the machine.

So why is that any different than using the jaws from internal but not having it seated on the face of the jaws?
All cutting action for this is into the chuck, not to push it back.

 

[GHThomas]

The other FB site has 44K+ members.

 

[RaisedByWolves]

So why is that any different than using the jaws from internal but not having it seated on the face of the jaws?
All cutting action for this is into the chuck, not to push it back.

The diameter of that part is 2-3X the size of the chuck.

He wants to remove about .500" off of the diameter with this mostly being an interrupted cut in hard material.

There's nothing keeping this from walking back towards the headstock, and that little chuck does not have enough grunt to secure the gear given the leverage over the chuck that far from center.

As to using the stepped portion of the jaws and the part not being seated, if it were to come lose in that scenario it would likely just fall onto the carriage or tool post.

I've had parts come out of the chuck, and chucks come off due to boneheaded coworkers and the worst thing they did was spin around the shop until they got tired.

If that huge ring gear were to come off towards the headstock with the chuck jaws extended and no clearance to speak of, well, I wouldn't even want to see the aftermath.