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#Post#: 12136--------------------------------------------------
A new Peerless 110 Differential
By: Graham Hill Date: December 16, 2024, 3:37 am
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I am pleased to confirm that Gemini Karts now have a stock of
‘metric’ Peerless differentials and axle suitable for the
European market. The Peerless 110, now available on Gemini Karts
website, is the result of their direct design negotiation with
Comet (Comet Clutches and Peerless Gear LLC are sister companies
under the USA group ‘Certified Parts Corporation’).
The differential is supplied with a 1000mm long 25mm diameter
axle keyed along its entire length, (both sides), complete with
grooved ends to accept a circlip retainer, allowing the fitting
of standard 25mm go kart drivetrain components.
Gemini Karts also have a stock of compatible 420 60-tooth
plate-wheels available, with a 420 70-tooth plate-wheel soon in
the New Year. Their recommendation is to fit a disc brake to
both axles and a new 200 diameter disc for carrier-mounting is
also available soon.
All further enquires to either Chris or Mark at Gemini on 01933
357797.
#Post#: 12137--------------------------------------------------
Re: A new Peerless 110 Differential
By: Jimr1999 Date: December 16, 2024, 4:01 am
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Looks like a total re-design from previous Peerless 100 series
diffs Graham, and the 25mm keyed axle will make it a lot easier
to use on a CK. A great improvement.
Its torque rating is fine for our requirements (Standard engine
is about 13N/M at shaft, so geared up, that leaves headroom)
I will add that in my experience of braking the diff casing
rather than each shaft, I have yet to find a problem with the
result, but understand the logic behind braking both axles.
When I fabricated mine, I used long and short half axles to get
the diff and sprocket to accept a central engine position and
direct drive for the torque convertor, this saved room in the
engine bay and the need for an adapter (Like used in many U.S.
builds) to offset the sprocket.
HTML https://www.renegadecyclekarts.com/products/p/differential-sprocket-adapter
A layshaft solves that issue.
The new guidance on maximum track would be well within at 1m
total length, axles up to 1090mm seem to be within our rules.
I am sure all 15 will fly off the shelf with Gemini and I wish
them luck with it.
#Post#: 12138--------------------------------------------------
Re: A new Peerless 110 Differential
By: Jimr1999 Date: December 16, 2024, 4:13 am
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... thinking out loud for future re-designs Graham, if the
design was altered so one of the half shafts was 90mm longer,
that would kill two birds with one stone??? A 1090mm axle and an
offset diff location.
JimR
#Post#: 12139--------------------------------------------------
Re: A new Peerless 110 Differential
By: Graham Hill Date: December 16, 2024, 4:16 am
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Jim. Yes, Gemini do not currently offer a spacer to offset the
platewheel, but are happy to develop one if there is a
requirement. Additionally they have suggested that further
design changes are possible with Comet if unequal axle lengths
are seen as a preference. If you email me with
suggested dimensions I can get them onto this.
#Post#: 12145--------------------------------------------------
Re: A new Peerless 110 Differential
By: StefanN Date: December 17, 2024, 2:29 am
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[quote author=Jimr1999 link=topic=1618.msg12137#msg12137
date=1734343297]
Its torque rating is fine for our requirements (Standard engine
is about 13N/M at shaft, so geared up, that leaves headroom)
I will add that in my experience of braking the diff casing
rather than each shaft, I have yet to find a problem with the
result, but understand the logic behind braking both axles.
[/quote]
Thanks for the news Graham and well done Gemini.
Jim, under braking, you need about 280Nm (very approximate) to
lock the back axle which comes closer to the max torque of the
diff (305Nm). I suspect there’s a good safety margin in the
spec, but I can see the logic in braking both sides.
#Post#: 12146--------------------------------------------------
Re: A new Peerless 110 Differential
By: Jimr1999 Date: December 17, 2024, 3:01 am
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Me too Stefan, makes for a good safety if the diff does fail. If
the wheels lock at that force, then they should also spin at
that torque?
The new Peerless110 diff has a much narrower body than the old
100 Peerless, mounting both a disc and a sprocket would not be
possible without an adapter.
JimR
#Post#: 12148--------------------------------------------------
Re: A new Peerless 110 Differential
By: Granville Date: December 17, 2024, 2:36 pm
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I run twin brakes with the peerless 100. My theory was that if
using a single brake on the diff housing and one wheel locked up
and started sliding the other would be free to rotate within the
diff so you would not be braking that free spinning wheel at
all. I ended up using an adjustable twin piston master cylinder
so that both brakes could be matched so one side did not lock up
before the other.
This diff looks so much better than the 100, as the shafts on
the 100 had to be machined down to 25mm and a 6mm slot then had
to be machined all the way along the shafts.
Tempted to get one of the 110s for my second build but wonder
just how much difference does a £250 diff make than a solid axle
for what we use them for, having never driven a solid axle I
don't know the advantage or disadvantage that come with using or
not using a diff. Anyone any experience of using both, is one
better than the other?
#Post#: 12154--------------------------------------------------
Re: A new Peerless 110 Differential
By: Jimr1999 Date: December 18, 2024, 6:39 am
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News to me...
On looking through the Gemini site today, it seems you can now
get the front steering arm in the low position as well as the
high position. Gives more flexibility in steering link location.
HTML https://www.geminikarts.co.uk/product/front-axle-steering-arm-yolk/
JimR
#Post#: 12159--------------------------------------------------
Re: A new Peerless 110 Differential
By: jim Date: December 19, 2024, 12:06 am
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These axles look good and the price seams ok. I've got to go to
the doctors this morning and it's just round the corner from
Gemini. I may have to call in, buy one and fit it to the Ford
Schlock inspired CK I'm very slowly building. I will try and put
up some build photos in the next 12 months or so, if any
progress is made.
#Post#: 12165--------------------------------------------------
Re: A new Peerless 110 Differential
By: Jimr1999 Date: December 19, 2024, 6:59 am
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Dimensioned drawings courtesy of Gemini Karts attached...
JimR
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