Author Topic: Halls MK3 Drive belt  (Read 194 times)


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Halls MK3 Drive belt
« on: May 31, 2022, 02:30:15 PM »
I have a Halls mark3 and wonder if anyone knows where I can purchase a new drive belt for it or  do I need to get one made.  Not too many options here in the NT. Any help appreciated


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Re: Halls MK3 Drive belt
« Reply #1 on: May 31, 2022, 05:06:53 PM »
I presume this is a round belt.
If you are near a major town, Darwin Alice or Katherine take your belt along to a bearing supply place, they have continuous round belting in various diameters. Buy whatever length you need and weld the ends together.

Next is the how to of welding the ends, they will probably want to sell you a little barbed thing for joining it, get it if you don't feel confident with welding it. The barbed thing makes a bit of a lump in the belt which will give you a tick every time it goes around, not really a deal breaker but it can be eliminated. Welding it is really easy and will take only a few seconds once you have gathered your bits and pieces.

Tools: An old kitchen knife, you will be heating this so not a good one. A spare set of hands will be helpful. A lighter or gas torch to heat the knife. Razor blade.
Method: Trim the ends nice and flat with a clean razor blade, this also removes any body oils or oxidation on the ends. Get your spare set of hands to hold the knife so you can easily see both sides of the blade, Apply heat to a small area of the blade and then hold your belt ends on the both sides of the hot blade near the spot where you heated it but not right on the area where the flame was in case there's any carbon or soot. When the belt ends start to melt just move them down and press them together, don't press too hard or you will push all the molten plastic out of the fusion zone and get a bad join. You will have a small circular lump where the join happened just trim this off with your razor blade or you can leave it, it wont affect the belt.
If you do this properly the join will be as strong as the rest of the belt.


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Re: Halls MK3 Drive belt
« Reply #2 on: June 02, 2022, 12:09:24 PM »
Thank you for  the info  and  yes it is a round belt  appreciate  all  the  instructions


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Re: Halls MK3 Drive belt
« Reply #3 on: June 14, 2022, 10:02:43 PM »
Hi Territorygirl - I had a similar problem with broken belts when I was working in Honiara, Solomon Islands. Needless to say there aren't any lapidary repair shops there so I went to Island Enterprises, the local hardware store, and bought a 3mm 'O' ring that was used for water pumps it worked a treat and was really cheap. Now I'm back in Australia I've had to replace the belts and found CBC bearings had neoprene "O' rings in stock that fitted .


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Re: Halls MK3 Drive belt
« Reply #4 on: June 15, 2022, 01:07:03 PM »
Loctite 406 will bond them. I have a couple on hand all the time and easy to replace when needed, usually halfway through a facet. When they break I replace with the spare and reglue the broken one and put it aside for later.


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