Aussie Lapidary Forum

LAPIDARY => Gemstone Faceting => Topic started by: Rik672001 on April 23, 2021, 07:24:22 PM

Title: Halls Mark 3
Post by: Rik672001 on April 23, 2021, 07:24:22 PM

Hi
I have bought a secondhand Halls mark 3 and am having problems with the dop arm sliding down the shaft. I have removed the rubber seal and think there should be some ball bearings or something to hold it in the groove. Can anyone assist on what holds the arm up on the shaft
Thanks
Erik

Title: Re: Halls Mark 3
Post by: Pro-oz on April 24, 2021, 12:21:19 PM

I have the Hall Mk 3, but a different arm to what yours is. I have had it apart, up the index wheel end is a sealed ball bearing and a press fit holds the shaft on. Mine hasn't got the threaded part or the rubber ring, what holds the index wheel on? By the looks a nut? Mine has two little threaded screws. Must have been an upgrade along the line.
What does the shaft look like with the hand piece slid off? is there a groove were little ball bearings would run? That's all I can think of, so sorry can't help at this stage.

Cheers
Prooz.

Title: Re: Halls Mark 3
Post by: mehoose on April 24, 2021, 01:21:56 PM

Erik, I did a quick google search and found a pdf upload that Andrew hosted through his website.link is here, there might be something that will help you out?http://www.aussiesapphire.com/Storage/Hall_Mk3.pdf (http://www.aussiesapphire.com/Storage/Hall_Mk3.pdf)
Leah, if this is a no no on my part, remove it!

Title: Re: Halls Mark 3
Post by: Rik672001 on April 24, 2021, 01:24:59 PM

Thanks Prooz, i have measured it and the hole is 3/32 so i think a ball sits in either side and the rubber o ring holds them in and they align with the groove on the shaft. It appears the dob holder doesnt go all the way snug up to the end when in place.

Title: Re: Halls Mark 3
Post by: Rik672001 on April 24, 2021, 01:26:31 PM

Thanks Mehoose, i have looked at that and it doesnt show the piece i am after

Title: Re: Halls Mark 3
Post by: Pro-oz on April 24, 2021, 04:45:17 PM

 mine is the same as the one in the picture, pdf that mehoose put up.

Title: Re: Halls Mark 3
Post by: Dihusky on April 25, 2021, 06:08:45 PM

If in doubt ask Horst Ricker, he knows these machines better that anyone, also does beautiful quill upgrades.

Title: Re: Halls Mark 3
Post by: Glen edge on August 20, 2021, 12:49:18 PM

not sure if im too late but i have a mk3 halls machine and mine has 2 small bearings, 1 either side behind tje rubber seal under the lock nut for the index wheel.
hope this helps

Title: Re: Halls Mark 3
Post by: Glen edge on August 20, 2021, 12:54:33 PM

just saw your pic in first post. mine is the same. should be 2 little ball bearings in those holes
glen