Thrust bearing on a Neu motor

[egneg]

Do I need to put one on this motor? If you think I should what should I use as a spacer as the motor bearing area is much larger than the thrust bearing and it won't be pushing against the case. Thanks for any help.

[properchopper]

Jan at Kintec Racing has some nifty 5 mm spacers-check out his site.

[sailr]

You have a choice, shorten the motor shaft or use one of Kintec's spacers. I have done both. Either is acceptable in my opinion.

[Rumdog]

What motor and boat?

[sailr]

It doesn't matter what motor and boat! If the shaft is too long for the collet to be pushing against the bearing, then you must either A) add a spacer or b) shorten the shaft!

In my case it's a Neu 1509/1Y in a custom N2 Mono. But I have done it with several motors and boats. It's just that you want the load going against the bearing.

[Rumdog]

True, I was just thinking that if it's a small hull and motor, he may not have to run a thrust bearing. But it can never hurt to run one that's for sure.

[raptor347]

If the rear end bell is pinned/set screwed you don't need the thrust bearing.

If you feel you need to run one. Make a mount plate with a shaft hole small enough so it can take the load off the thrust bearing.

[Rumdog]

Is this true even on hulls in the mid 30" range?

[raptor347]

I don't run a thrust bearing on any of my Neus, including the 100+ mph SAW boats.

On the early motors that didn't have pinned end bells, it could be a problem. Once they started pinning them you can put pretty much all the load on them you want.

[tth]

Brian is right no thrust bearing needed. They have some great bearings on these neu motors.

[Chilli]

Chuck, I was asking myself the same question at the beginning of the year when I got my Neu. I ended up using a stainless fender washer, trimmed down the sides a bit for the mounting screws and used contruction adhesive to glue it to the motor mount. Works like a charm. But you learn something new every day on this board, and Brians word is good enough for me.

[Fluid]

I've never run a thrust bearing on a Neu, and here's why - none of mine have any endplay. Without endplay you cannot load the thrust bearing properly, you don't know for certain if you are putting the shaft in a bind or not. Feiago and Hacker motors have a little endplay, so you can make certain that you are not installing the thrust bearing with a preload - which adds drag and thus heat and a slower boat.

The bearings in the Neus are large enough to handle the thrust laods just fine, in fact they are designed for it in aircraft applications - where the Neus came from. My 9-pound P Sport Hydro has run just fine without a thrust bearing for almost a year's worth of racing - it's plenty fast too.




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[egneg]

Thanks for the input guys. The Neu I have is pinned and the bearings are large so I will forgo the thrust bearing.

Mike that is a good idea you have as I think it's better than other spacers I have used.

[Chilli]

I thought it was a good idea too until I learned from Brian and Jay yesterday that its not needed... Don't want any extra drag so I'll be pulling it off.

Have a great weekend Chuck. I hear the big stipers are running up the bay and will to try to catch a few.

Mike

[sailr]

Good info! Yes, most brushless inrunners started out in aircraft applications. In an airplane though, it is PULLING rather than pushing against the motor and bearings. That didn't present the same problems as our application. I definitely use thrust bearings on everything but guess I can go ahead and remove them from my NEU motors!

Thanks!!