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2:1 reduction gear

 

I'm looking into re-battery and a general re-jigging of my system.

I've been running a 36v system but never running the controller over 50% throttle. Now that my T145s have shown signs of needing to be replaced after 11years, i'm thinking of going LiFePO ? on 48v and putting a 2:1 reduction on my Perm 132 perm mag motor. This would enable the motor to run faster at lower amps (cooler) and also have the motor running most of the time in the 'forward' direction. At my power output and voltage that the motor is running in reverse most of the time isn't actually a problem, but the brushes may last just that little bit longer with the motor running the 'correct' way. :-)

Any one have any points to a high efficiency gearbox of approx 2:1 ratio ? Most of the examples I've found so far also include clutches, a feature not needed here.

About 2.4-3kw moves my boat at hull speed, so I don't need something of high power capability.
 

Thunderstruck has a pre-built reduction that might work for you.

On 6/2/2020 11:47 PM, Matthew Geier wrote:
I'm looking into re-battery and a general re-jigging of my system.

I've been running a 36v system but never running the controller over 50% throttle. Now that my T145s have shown signs of needing to be replaced after 11years, i'm thinking of going LiFePO ? on 48v and putting a 2:1 reduction on my Perm 132 perm mag motor. This would enable the motor to run faster at lower amps (cooler) and also have the motor running most of the time in the 'forward' direction. At my power output and voltage that the motor is running in reverse most of the time isn't actually a problem, but the brushes may last just that little bit longer with the motor running the 'correct' way. :-)

Any one have any points to a high efficiency gearbox of approx 2:1 ratio ? Most of the examples I've found so far also include clutches, a feature not needed here.

About 2.4-3kw moves my boat at hull speed, so I don't need something of high power capability.
Bob Jennings
 

I ended using a Browning EPT 3200 series helical gear drive with C Face adapter for my set up. Downside I needed to have a drop pan fabricated to sit over the stringers in the engine compartment.?


On Wed, Jun 3, 2020, 3:44 AM Bill Farina <bill@...> wrote:
Thunderstruck has a pre-built reduction that might work for you.



On 6/2/2020 11:47 PM, Matthew Geier wrote:
> I'm looking into re-battery and a general re-jigging of my system.
>
> I've been running a 36v system but never running the controller over
> 50% throttle. Now that my T145s have shown signs of needing to be
> replaced after 11years, i'm thinking of going LiFePO ? on 48v and
> putting a 2:1 reduction on my Perm 132 perm mag motor. This would
> enable the motor to run faster at lower amps (cooler) and also have
> the motor running most of the time in the 'forward' direction. At my
> power output and voltage that the motor is running in reverse most of
> the time isn't actually a problem, but the brushes may last just that
> little bit longer with the motor running the 'correct' way. :-)
>
> Any one have any points to a high efficiency gearbox of approx 2:1
> ratio ? Most of the examples I've found so far also include clutches,
> a feature not needed here.
>
> About 2.4-3kw moves my boat at hull speed, so I don't need something
> of high power capability.
>
>
>
>
>
>
 

+1 for the Browning gear box.? I'm using a CbN-3201-SB3-2.5 with the NEMA spec C-face adapter, my Motenergy PMAC motor bolted right up to it.? The Browning gear boxes are industrial grade with service levels of 10,000 hours before changing the factory oil.? They are figuratively, and maybe literally, bulletproof.? They are relatively inexpensive, small, light, quiet, and efficient.? These gear boxes are available for various power levels and in a variety of different gear ratios, My box ratio is 2.55-1.? You can see a pic in the "Eric's Serenity" photo album in this group.??/g/electricboats/album?id=190248?

Fair winds,
Eric
 

I don't seem to be able to find anyone who sells those in Australia and my motor is german and has metric mounts and what? I can find seems to indicate these gearboxes use imperial dimensions.
(My country?went 100% metric system when I was a child, I don't even have any ability to estimate?sizes/lengths?in imperial units, only metric)

Other than that, the gearbox looks ideal for me, it will fit in the old engine bay and has no nasty?spinning bits.
The thunderstruck belt drive is wonderfully simple but would require rebuilding my engine box to be higher and would need a guard around the belt.

On Thu, 4 Jun 2020 at 07:37, Eric via <ewdysar=[email protected]> wrote:
+1 for the Browning gear box.? I'm using a CbN-3201-SB3-2.5 with the NEMA spec C-face adapter, my Motenergy PMAC motor bolted right up to it.? The Browning gear boxes are industrial grade with service levels of 10,000 hours before changing the factory oil.? They are figuratively, and maybe literally, bulletproof.? They are relatively inexpensive, small, light, quiet, and efficient.? These gear boxes are available for various power levels and in a variety of different gear ratios, My box ratio is 2.55-1.? You can see a pic in the "Eric's Serenity" photo album in this group.??/g/electricboats/album?id=190248?

Fair winds,
Eric

 

¿ªÔÆÌåÓý

Can I ask what those go for? A Google search didn't show any immediate prices.

On 6/3/2020 2:37 PM, Eric via groups.io wrote:

+1 for the Browning gear box.? I'm using a CbN-3201-SB3-2.5 with the NEMA spec C-face adapter, my Motenergy PMAC motor bolted right up to it.? The Browning gear boxes are industrial grade with service levels of 10,000 hours before changing the factory oil.? They are figuratively, and maybe literally, bulletproof.? They are relatively inexpensive, small, light, quiet, and efficient.? These gear boxes are available for various power levels and in a variety of different gear ratios, My box ratio is 2.55-1.? You can see a pic in the "Eric's Serenity" photo album in this group.??/g/electricboats/album?id=190248?

Fair winds,
Eric

Bob Jennings
 

My gear reduction was a CBN 3201-S-B3- 1.8. Cost was $745.00.

Matthew, I bought mine from an industrial motor supplier. Browning is a world wide motor company.
Baldor is another major player in industrial motors. If Baldor is readially available in Australia ask the vendor to cross reference the part number.

On Wed, Jun 3, 2020, 5:37 PM Eric via <ewdysar=[email protected]> wrote:
+1 for the Browning gear box.? I'm using a CbN-3201-SB3-2.5 with the NEMA spec C-face adapter, my Motenergy PMAC motor bolted right up to it.? The Browning gear boxes are industrial grade with service levels of 10,000 hours before changing the factory oil.? They are figuratively, and maybe literally, bulletproof.? They are relatively inexpensive, small, light, quiet, and efficient.? These gear boxes are available for various power levels and in a variety of different gear ratios, My box ratio is 2.55-1.? You can see a pic in the "Eric's Serenity" photo album in this group.??/g/electricboats/album?id=190248?

Fair winds,
Eric

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