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Question about mounting sprockets

Old 08-03-2010, 12:13 AM
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Dirty_Vinylpusher
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Default Question about mounting sprockets

Just wondering what you guys think about this.
Which is the best configuration of grub screws when mounting a sprocket.










































A










or....








B



Old 08-03-2010, 01:55 AM
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bentley marshall
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Default RE: Question about mounting sprockets

a key way is the best .... but i would go with a and make A flat on the shaft where the screws are
Old 08-03-2010, 01:57 AM
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bentley marshall
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Default RE: Question about mounting sprockets

and where did you get your sprockets etc from ??
Old 08-03-2010, 02:00 AM
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Default RE: Question about mounting sprockets

I ordered that stuff in the picture through a local bearing/hydraulics/machinery parts shop.
They had to order it in from Sydney or Brisbane I think.

Can't remember how much it was as I got them ages ago, but I think it was around the $120 mark all up, with 3 meters of chain and the 4 sprockets.
10, 20 and 40 tooth sprockets.


(#25 chain by the way, same as on pocketbikes and scooters etc)





Old 08-03-2010, 02:49 AM
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Default RE: Question about mounting sprockets

DVP i followed the B way on mine.FG uses it too on their wheel squares.Also,make 2 flats,tighten the screws and drill where the mark from the screw is.Drill only 1-1,5mm
Old 08-03-2010, 05:14 AM
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Dirty_Vinylpusher
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Default RE: Question about mounting sprockets

FG uses it too on their wheel squares
I thought I had seen it set up like that somewhere, yes.



Also,make 2 flats
Yes I was planning to do that.
The axle is 1/2 inch and the grubs screws 5mm by the way.



a key way is the best
Yeah but how do you do that in the middle of the axle....?















Old 08-03-2010, 05:45 AM
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Default RE: Question about mounting sprockets

DVP i have many friends who own shops with mills,lathes,cncs ets...They all agree that a keyway on a such a small axle is a big no.First of all a keyway is going to weaken the axle and second is too much a pain in the @@s to make the middle point dead on 90 degrees.I don't say it can't be done,everything can...The question is,is it worth it when you can follow a much easier way?

Also,you have to drill the axle on the flat.I'll take a pic of my old one to show you what i mean
Old 08-03-2010, 06:39 AM
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frumpy
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Default RE: Question about mounting sprockets

Being in the machine tool field myself,every sprocket we ever did or bought had it like option B
Old 08-03-2010, 06:40 AM
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Default RE: Question about mounting sprockets

hi mate,
some of my older Korean machines have a brake on a 90 deg G/box.
the pulley is mounted to the shaft via option B.

V belt pulley drive
single phase 1HP motor
G/box shaft has 2 x flats at 90 deg to one another
pulley has 2 x M6 grub screws onto a 14mm shaft.
if thats any help..........
Old 08-03-2010, 08:08 AM
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Dirty_Vinylpusher
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Default RE: Question about mounting sprockets

3 for B and 1 for A so far then......?

Interesting.








Old 10-10-2010, 10:56 PM
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kenazzo2000
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Default RE: Question about mounting sprockets

b i think is the best

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