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Synchro909 · 10-02-2025, 12:23 AM

For years, I have been running water pumps I made by fitting a ceramic seal to an existing core or casting new ones. They have a ball bearing front and back and the first one I did now has about 60,000 miles on it and going strong.
The bodies I have cast are aluminium and the impellor is beefed up a bit to accommodate its share of the seal.
I haven't gone over board with keeping the appearance original - there is no castellated nut that used to tighten the packing but with one of those leather grease shields (totally unnecessary) fitted, nobody can see that.
Each pump takes me a lot of time on my simple lathe and I have considered producing them in commercial quantities but as I have said when talking about it, shipping and tariffs would be a killer even though the exchange rate is in my favour. To produce the expected quantities of these pumps, I would have to contract out some of the work - more costs and I would have to establish a relationship with a company in (probably) China to get that done. You already have that.
For those who cannot grasp shifting a crash box, how about a brake on the flywheel?

10-02-2025, 12:23 AM	#3
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 8,434	Re: I need a Project For years, I have been running water pumps I made by fitting a ceramic seal to an existing core or casting new ones. They have a ball bearing front and back and the first one I did now has about 60,000 miles on it and going strong. The bodies I have cast are aluminium and the impellor is beefed up a bit to accommodate its share of the seal. I haven't gone over board with keeping the appearance original - there is no castellated nut that used to tighten the packing but with one of those leather grease shields (totally unnecessary) fitted, nobody can see that. Each pump takes me a lot of time on my simple lathe and I have considered producing them in commercial quantities but as I have said when talking about it, shipping and tariffs would be a killer even though the exchange rate is in my favour. To produce the expected quantities of these pumps, I would have to contract out some of the work - more costs and I would have to establish a relationship with a company in (probably) China to get that done. You already have that. For those who cannot grasp shifting a crash box, how about a brake on the flywheel? __________________ When all is said and done, more is said than done. That's why we judge people on what they do, not what they say. I sometimes wonder what happened to the people who asked me for directions. If I am not in trouble, I've done something wrong.