Drill chuck disasembly
Have a Jacobs clone (at least it dosent have a name on it) 1/2 " that the
gear teeth are wrecked so was going to take it apart to see the innards.
Can't find how it comes apart.
Markings on it are as follows:
A sort of fat delta (Mazada engine rotor) RJ3-16L
That's all it says.
Does the "barell seperate or does it press off and if so how to support it etc. ?
Thanks for any ideas.
Heres a site with some instructions,
If it's a ball bearing chuck, watch for the bearing port during the press. If you're not careful, you'll be be chasing your balls around the shop floor.
I hate it when that happens.
Hehe, yeah, that was fun...
But later chucks, at least the Jacob Super Chucks, have caged bearings rather than loose.
I wouldn't know about that. My stuff is a little obsolete.
So---how does a keyless chuck come apart? Press the sleeve off, same as ordinary chuck?
Nope, they have an outer shell that screws off the body.
In my shop I have 12 Jacobs ball bearing chucks. Some of them were purchased used and the jaws are a little chewed up. I wanted to put new jaws in them so I called my industrial supplier and got a price. They only sell rebuild kits for the ball bearing chucks and the price was $115.00 for the 1/2" chucks. At that price I can buy two import ball bearing chucks. Enco's sale price on new Jacobsís ball bearing chucks is very close to that price. I don't think I will be purchasing any more Jacobs ball bearing chucks for my shop because of the cost to rebuild. I can put new jaws in my Albrecht chucks for $45.00 and it takes less than 10 minutes. Albrecht chucks are very simple to disassemble.
I am not a big fan of the keyless chucks when being used on my CNC mills, the spindle has a brake that stops the spindle so fast the chucks can open up. I think my next chuck purchase will be an Albrecht key type chuck. They use a T-handle type Allen wrench to tighten and are rock solid and dead true when tight.
Originally Posted by CCWKen
WOW, that thing is in great shape, nice knurling too, for 1902 or any era for that matter.