Does anyone have pics they could post of lightened Parma crown gears? I would like to see the "What and How" to do to these gears.
Lightened Parma crown gears
#1
Posted 21 January 2016 - 08:04 AM
#2
Posted 21 January 2016 - 09:11 AM
I don'i run retro, but I would envision drilling one of the two setscrew holes larger & grinding flats on the hub areas between the two setscrew holes. You aren't allowed to shorten the hub length. What isn't clear to me is whether or not you are allowed to drill holes in the gear's plastic. If you can, you might be able to use a metal spur gear's holes for a drilling pattern. Otherwise, the RGEO jig or a lathe's indexing head will work.
I intend to live forever! So far, so good.
#3
Posted 21 January 2016 - 09:27 AM
You can drill holes in the plastic. You can reduce the hub size and flatten sides. You can sand the diameter and you can take off some of the plastic on the non-tooth side of the gear.
You CAN'T relocate the set screw holes nor reverse the hub in the gear.
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Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#4
Posted 21 January 2016 - 09:34 AM
What Noose said.^
#5
Posted 21 January 2016 - 10:52 AM
The lighter the rotating mass, the faster the acceleration........
#6
Posted 21 January 2016 - 11:12 AM
.....and quicker braking (small difference tho it may be).
Don Weaver
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#7
#8
Posted 21 January 2016 - 11:35 AM
Does that have the sleeve in it? Doesn't look like it.
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Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#9
Posted 21 January 2016 - 11:37 AM
Aluminum ? Nice
#10
Posted 21 January 2016 - 11:39 AM
Per Muffin, it has an Aluminum Sleeve. No pictures of the backside.
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#11
Posted 21 January 2016 - 11:57 AM
Ahh OK. Aluminum is lighter than the brass. Before Parma made the gears with the brass sleeves, and before C/R made the brass sleeves available, we did use aluminum IF you could cut the set screw notch and then get it into the gear without bending it.
Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#12
Posted 21 January 2016 - 12:02 PM
WHY not move the set screw hole?? It's simple, and makes lightening the gear easier.
#13
Posted 21 January 2016 - 12:13 PM
It is not allowed.
Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#14
Posted 21 January 2016 - 12:37 PM
Was the aluminum tube drilled out before installing?
#15
Posted 21 January 2016 - 12:41 PM
It is not allowed.
I know that!!! I asked WHY???
#16
Posted 21 January 2016 - 12:48 PM
.2 gram lighter
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#17
Posted 21 January 2016 - 12:49 PM
I know that!!! I asked WHY???
Because we said so. Guys can drill holes and shave metal. Relocating and tapping a new set screw hole is not something the normal racer can do.
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Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#18
Posted 21 January 2016 - 12:54 PM
When will hear "Oh no my gear broke!" for the first time?
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#20
Posted 21 January 2016 - 01:56 PM
Thanks Bill.
Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#21
Posted 21 January 2016 - 02:00 PM
I have my bearings gummed by toothless Eskimo women to make them smoother........
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#22
Posted 21 January 2016 - 02:43 PM
Because we said so. Guys can drill holes and shave metal. Relocating and tapping a new set screw hole is not something the normal racer can do.
Assuming you have a drill press, you can relocate the set screw. I’ve ruined several gears in the process. I don’t recommend it. Bryan has the setup and experience. BP racers only!
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#23
Posted 21 January 2016 - 03:13 PM
By the time you go through all of this you might as well buy a Red Fox or Koford gear.
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Joe "Noose" Neumeister
Sometimes known as a serial despoiler of the clear purity of virgin Lexan bodies. Lexan is my canvas!
Noose Custom Painting - Since 1967
Chairman - IRRA® Body Committee - Roving IRRA® Tech Dude - "EVIL BUCKS Painter"
"Team Evil Bucks" Racer - 2016 Caribbean Retro Overall Champion
The only thing bad about Retro is admitting that you remember doing it originally.
#24
Posted 21 January 2016 - 03:35 PM
The latest Board postings regarding the various Retro Rules Sets indicate The Peter Principle applies to rules as well as management.
What happened to "KISS".
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Jim Honeycutt
"I don't think I'm ever more 'aware' than I am right after I hit my thumb with a hammer." - Jack Handey [Deep Thoughts]
#25
Posted 21 January 2016 - 04:38 PM
With Noose being in such a generous mood, maybe the right time to ask for tape on the bottom?...........
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