Pillar Drill - Movement after depth stop reached?

[Dissolve]

Hello,

I've been getting on fine with my jet pillar drill until now, but I've just started reaching my most precise work to date, and I've come across a really annoying gripe.

After I've set the depth stop nuts and locked them into place, if I lower the spindle to the depth stop, I get another 0.5/1mm of movement in it. Which itself, wouldn't be a problem, but this last bit of movement also wiggles the chuck to the side slightly!

In case I haven't explained it well:

- Depth stop set
- Handle lowered through work piece, depth stop reached
- With the smallest amount of pressure, the spindle is lowered another small increment (Possibly 1mm)
- This not only lowers the spindle lower than the depth stop but it also wiggles it to the side ever so slightly!

You can see the nuts on the spring feed adjustment move this last increment, but the depth stop threaded bar does not move, so I know this is nothing to do with a sloppy depth stop etc. The movement itself appears to come entirely from the spindle.

The spring feed adjustment casing does not move but the two nuts that lock together outside of this casing move.

Does anyone have an idea of how to solve this?

 

[Spindle]

Hi

Sounds like play between the quill and its sleeve - have a good look at where the quill comes out of the body of the drill when fully extended - can you see / feel movement between the two when applying additional pressure to the extending lever?

When the drill moves does it move in the direction of the depth adjusting mechanism - if so this reinforces the above suggestion.

Regards Mick

 

[Dissolve]

Hi

Sounds like play between the quill and its sleeve - have a good look at where the quill comes out of the body of the drill when fully extended - can you see / feel movement between the two when applying additional pressure to the extending lever?

When the drill moves does it move in the direction of the depth adjusting mechanism - if so this reinforces the above suggestion.

Regards Mick

Hello Mick,

I'm afraid I don't quite understand what you mean, When the drill is fully extended to the point that the depth adjustment nuts touch the depth stop, the chuck only extends downwards, yet if additional pressure is applied to the handle once the depth stop has been reached, the chuck extends another mm or so downwards and also wobbles to the side slightly.

Would you mind clarifying what parts you are referring to when you say it sounds like play between the quill and the sleeve as I'm not entirely sure yet which parts are moving and which parts are behaving correctly.

Thanks for the help!

 

[Spindle]

Hi

The quill is the bit that extends and holds the chuck - I'm suggesting you look for play between this and the casting of the machine, where the quill comes out of the casting.

When you say that the drill moves a little to the side and down, does it move in the direction of the depth stop nuts?

Regards Mick

 

[Dissolve]

Hi

The quill is the bit that extends and holds the chuck - I'm suggesting you look for play between this and the casting of the machine, where the quill comes out of the casting.

When you say that the drill moves a little to the side and down, does it move in the direction of the depth stop nuts?

Regards Mick

Hello,

I've given it a closer look today and it seems that the depth stop nuts/threaed rod actually move along with the outer sleeve that the quill/spindle moves up and down inside, it seems to all move side to side in a twisting motion slightly. There's nothing to tighten obviously which is a bit annoying but I can't think what else to try.