[PSUBS-MAILIST] Minn Kota lower unit material

Mon Apr 30 21:57:14 EDT 2018

Phillipe,
here is the link to James's site that documents his K350 build.
Somewhere in the build log you should see how he has done his rotating
thrusters. 
http://www.guernseysubmarine.com/index.htm
I understand where you are coming from in that a welded rod on to the 
thruster's penetrator would be more substantial than a threaded rod
that may unwind.
As the guys have said, watch that the magnets don't get too hot. Also most
magnets are glued on so any heat may effect the glue. 
All the best.
Alan

Sent from my iPad

> On 1/05/2018, at 1:18 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Just thread the rotating shaft so it screws into the motor, the same way the original shaft fit into the motor.  Then drill the rotating shaft for wires and fill the void with epoxy (potting)  James Franklin has a site with very good detailed pictures that will help you.  I personally have not done this but most if not all K250's are done this way.  I am sure those that have done exactly what I mentioned will be happy to guide you.
> 
> Hank
> 
> On Monday, April 30, 2018, 6:30:42 PM MDT, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> I currently build a modified version of the k-250. I want to figure how to fit the minn kota to the rotating shaft. (both side of the sub.)
> 
> Philippe
> 
> 2018-04-30 20:00 GMT-04:00 hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>:
> Phillippe, not sure what your asking?  if your asking if you can weld a fitting onto the shaft stub, I would say yes, providing you don't get the part to hot.  I am not sure why you would weld it though.  You can simply pot wires right in the stub hole, and I have two thrusters like that.  You can thread a fitting into the stub that is a penetrator.  Both options work well, but welding it will also work.   Maybe you can explain what your planning to do and why you want to weld a part on.
> Hank
> 
> On Monday, April 30, 2018, 5:24:26 PM MDT, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
> 
> 
> ok it is strong enough ? 
> 
> 2018-04-30 14:04 GMT-04:00 via Personal_Submersibles <personal_submersibles at psubs. org>:
> i sketched out an adapter for mine. Will screw them in with epoxy and call it a day.
> Vance
> 
> 
> 
> -----Original Message-----
> From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs. org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs. org>
> Sent: Mon, Apr 30, 2018 11:36 am
> Subject: Re: [PSUBS-MAILIST] Minn Kota lower unit material
> 
> I’d be concerned about warpage. You may need to re machine the ends?
> Rick 
> 
> On Sun, Apr 29, 2018 at 12:40 PM hank pronk via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
> Be careful about welding to the magnet barrel.  Heat will ruin the magnets, you could submerge the barrel in water while you weld the penetrator.
> Hank
> 
> On Sunday, April 29, 2018, 1:30:43 PM MDT, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
> 
> 
> Ok. thanks. I think to weld my penetrator to it. (at the place of the original shaft)
> 
> Philippe
> 2018-04-29 15:15 GMT-04:00 Cliff Redus via Personal_Submersibles <personal_submersibles at psubs. org>:
> I have a number of Minn Kota 101 lower units, MK part number 2886289.  While I don't have anthing from MK on materials, I tend to agree with Hank.
> 
> 1) Main body that has the permanent magnets attached is some kind of steel.
> 2) Brushed end assembly that holds the shaft bushing and lip seals is cast aluminum (probably 6061-T6)
> 3) Bow end of lower unit that holds a bearing is also cast aluminum (probably 6061-T6)
> 
> Cliff
> 
>  
> 
> On Sat, Apr 28, 2018 at 7:11 PM, Philippe Robert via Personal_Submersibles <personal_submersibles at psubs. org> wrote:
> Hi,
> 
> I have a question about Minn Kota engine Housing. What kind of steel is made ? 
> 
> Thank you,
> 
> 
> Philippe
> 
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