Tauco pillar drill

[pitch pine]

I have had this old pillar drill for a while and decided the other day to have a proper look at it. It is a bench model standing about 30" tall. It runs fine and the table slides smoothly up and down the post, but the alloy stepped pulley above the chuck has been damaged. Are these available anywhere? Also the chuck is difficult to open, I think it is marked Jacobs 3s taper. I have tried to remove it with hardwood wedges, but this is moving the chuck and the slotted drive shaft in one piece. What I am doing wrong? The idea is to get the drill functional again rather than looking new.

 

[Limey Lurker]

To remove the chuck you need a "Morse Tapered Drift". Lower the chuck and look through the slotted hole whilst turning the chuck. You will see that the inner shaft has also got a slot. At the bottom of this inner slot you will see the top of the Morse taper shank. Poke your tapered drift into the slot (flat side down), hold the chuck, and give the thick end of the tapered drift a firm whack with a hammer. The chuck will drop into your hand. HTH.

 

[pitch pine]

Thanks Lurker. I am not sure what you mean by slotted hole. I think I 'll take a few pictures and post them.

 

[pitch pine]

I understand what you mean by slotted hole now, having watched a youtube video of someone changing a drill chuck. They used a tapered drift to free the chuck.......but there is no slot on the quill (I think this is the right word) of this drill. I did find a pin in the shaft, which comes free......but what next? Do I hit it yet?

 

[Limey Lurker]

It sounds as if it's NOT a Morse taper. I know of only 2 other options; a Jacob's taper or a left-hand thread. A Jacob's taper is much smaller than a Morse taper, and is separated with a "U" shaped wedge between the top of the chuck and the quill adjacent, one leg of the "U" going each side of the quill. A left-hand thread is very unlikely if your machine has reversing facility, as there would be the risk of the chuck unscrewing itself if worked hard. A left-hand chuck can be removed by inserting a chuck key as normal, holding tight the top pulley, and hitting the chuck key with a hammer against the direction of rotation, i.e. from right to left.
Regards
Steve

 

[pitch pine]

Thanks Steve. The chuck says Jacobs Taper 33. I did try wedging the chuck out with 2 pairs of gradually tapering hardwood wedges. These were inserted between the top of the chuck and the quill. It drew out the chuck with drive shaft attached. So maybe it is left hand thread. Would that explain the hole in the shaft 1/2" above the top of the chuck? Must be there for a reason.

 

[pitch pine]

So I won in the end. It is a taper fit and the hole through the shaft is so you can insert a rod to wedge against. I also drilled through the bottom of the open chuck and gave it a whack. Although its not a great photo you can probably see how badly marked the taper on the shaft is. The chuck seems beyond repair, it sticks in a couple of positions and looks badly worn. I bet a replacement will be hard to find and expensive. It is marked 6A 33 taper, CAP 0-1/2, Jacobs Chuck.

 

[SteveF]

hi pitch

its useless now

put the whole drill in the post and send it to me

i will scrap it for u :lol: :lol: :lol:

p.s. i just jealous cause i cant find a nice old drill....ignore me

steve