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Special parts .

Old 09-11-2010, 10:07 AM
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VassilisG
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Default Special parts .

I think that it is better to upgrade my parts , at first and then I'll use these parts in next projects.

I'll start with brakes. I want one hydraulic disck brake for each wheel , 82 mm rotor and 17 mm piston . I want a hub to put the calliper on.

So i want a hub - calliper set to start this , for front and one for rear wheel. The best way for me is cast alloy.

Lathe , miiling machine , router and prototype parts are ready to use in home foundry.




Front hub - calliper -steering hold part.Prototype and cast alloy part.




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Rear .... the same.




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After some happy- working hours...





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... with seal and piston in calliper




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My babies are ready.

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Old 09-11-2010, 02:57 PM
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sheograth
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Default RE: Special parts .

Nice work
Old 09-11-2010, 04:20 PM
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Dirty_Vinylpusher
 
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Default RE: Special parts .


ORIGINAL: sheograth

Nice work

"Nice"?

I think words like "Outstanding" and "Magnificent" are more suitable to describe it










Old 09-12-2010, 03:32 AM
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Jgilk1
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Default RE: Special parts .

wow man just wow that is some sexy machinery you got right there...
Old 09-12-2010, 05:03 AM
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TIGER76
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Default RE: Special parts .

[X(] Just amazing as usual vass[8D][8D]

...........I need a underground workshop and pay you loads of cash to stay in there for me lol
Old 09-12-2010, 06:09 AM
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VassilisG
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Default RE: Special parts .

Thanks again.


TIGER76 : Find lab , cash , beer and call me.Ha ... ha ...ha...ha
Old 09-13-2010, 05:34 AM
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Mudgy
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Default RE: Special parts .

Hi Vass, you make some fine stuff alright. I am guessing you have made a master cylinder, too? great work, man!
Old 09-13-2010, 12:45 PM
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VassilisG
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Default RE: Special parts .

Thanks Mudgy.Master cylinder ? I dont know this time , maybe in future.

There is a problem with master cylinder from bikes.I need something more because I have 4 pistons in long travel and these (m. c. ) are for 2 , max 3.
Old 09-18-2010, 03:31 AM
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Mudgy
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Default RE: Special parts .

If the MC has short stroke, make a larger dia. piston & bore. You can move more fluid volume with a shorter stroke this way (just need a beefy servo to push)


but I reckon you got that sorted already, right?
Old 09-18-2010, 04:07 AM
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VassilisG
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Default RE: Special parts .

Big bore with the same travel gives more fluid volume but the result is less progressive.

I thing about MC with 30% bigger bore and 30% longer travel .

Old 09-25-2010, 08:28 AM
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VassilisG
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Default RE: Special parts .

... and with 82mm floating on 3 pins, rotor.





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Old 09-25-2010, 09:35 AM
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sam123
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Default RE: Special parts .

Thats some amazing stuff you've made there. Well done mate [8D]
Old 09-25-2010, 04:21 PM
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da mad maori
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Default RE: Special parts .

wow thats very impressive!!! didnt realize the size... its so small
Old 09-25-2010, 06:10 PM
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Default RE: Special parts .

Simply stunning!
Old 09-26-2010, 05:52 AM
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Default RE: Special parts .

Nice work.... can´t wait to see more
Old 09-26-2010, 07:43 AM
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Jgilk1
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Default RE: Special parts .

ok so im not real familiar with disc brakes or the fluid transfer theory....

but if you have a 3mm stroke and a 5mm bore (theory) why not just restrict the flow to the calliper/piston??? or reduce the size of the break line???


but damn i wish i could machine @ all let alone that well some sexy parts....
Old 09-26-2010, 12:26 PM
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rangerfredbob
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Default RE: Special parts .

the size of the line isn't the problem or even in the equation, it's pretty much like levers, the surface area of one piston in relation to the other are the important parts, you can consider it like levers (except backwards) the larger the length (smaller the diameter of piston) the harder you can push with less force. In this situation the differential volume is the issue, he's running out of stroke in the master cylinder before the caliper pistons apply full force to the disc, so he would need a larger master cylinder piston to displace more volume which will in turn require more force (probably not a huge issue)

very cool parts by the way
Old 09-26-2010, 01:45 PM
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VassilisG
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Default RE: Special parts .

Thanks guys.



About pistons , lines ,bores etc .....

I use 17mm bore piston in calliper and it travels 0,8 mm - 1mm .So I need 3,14 x 8.5 x 8.5 x 1 = 227 mm3 for each calliper , or
227 x 4 = 908 mm3 for 4 callipers.

Bike's master cylider has 10mm bore and 10 mm travel ..... =785 mm3. Thats not good.

I have start a master cylider design . I'm thinking for 13mm bore and 12mm travel... that gives 1592 mm3 ... very good.

If I use 16mm bore ( as motor bikes m.c. ) , i'll need about 7 mm travel to take 1592 mm3 but I must use a very strong servo or very big (m c ) lever and I'll lost the progressive of my brakes.


A homemade master cylider is coming to accomplish the brake system.

Old 09-28-2010, 05:44 AM
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Mudgy
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Default RE: Special parts .

I thought you'd end up making yr own mate..well done

I had a look in the bike shop last week..had a look at the Shimano set - up on some mountain bikes...take away the lever, and you'd need a serious servo to push the master cyl...but it looks like a good system as an alternative. Bear in mind it stops a rider on a bike going downhill. A lot of energy required. Translate that into 40 kg doing 80km/h...I reckon it would be similar
Old 09-28-2010, 12:22 PM
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VassilisG
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Default RE: Special parts .

Simano mc is very strong but in sort travel. I used a Simano mc , to Red scorpion , 2 callipers , 4 pistons , 2 rotors and worked grate but now I have 4 piston and 4 rotors . I need much more travel (+ 40 % ).

Whene I pressed the lever , till the end , the pads only touch the rotors. If I use 3 callipers , everything is ok.

This is a new idea , to use only one rotor , on diff , rear and two ,on the wheels , front.

But now I want to use 4 rotors and 4 callipers , so ..... I'll build one mc.
Old 09-28-2010, 03:36 PM
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Jgilk1
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Default RE: Special parts .

have you thought about using a mc off like a 125cc motorcycle??

Old 09-29-2010, 12:34 AM
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VassilisG
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Default RE: Special parts .

Do you thing this 'huge' part in the car ?

Yes it could work but I couldnt see it in 'my' car It is a challenge , for me . I haven't ever built a mc.Thats the best time.
Old 09-30-2010, 10:38 AM
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VassilisG
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Default RE: Special parts .

Next one , absorber.

Its the time for new generetion. The old and the new together .



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Old 11-20-2010, 06:18 AM
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VassilisG
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Default RE: Special parts .

A new edition of my diff.

Ball bearings only. No more bushings.
Belt drive use. No more chains.
This is not the final form , the structure only.




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Old 11-20-2010, 08:06 AM
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sam123
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Default RE: Special parts .

Very nice [8D]

Where did you get the diff gears from?

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