Chain
drive is often overlooked for its efficiency, when in fact it is an
extremely effective method of transmitting drive with up to 95% of the
power being transferred from one shaft to another. In addition to
efficient transmission, chain drive is also flexible and adaptable,
avoiding the need to cut special gears to change ratios, when off the
shelf products can be matched to most tasks, simply be changing sprockets.
The
drive chain of any vehicle is one of the most important components and yet
normally gets the least attention. The standard drive chain of older
motorcycles and cars are of the "Roller Chain" type. The chain consists
of two major parts, 1) the pin link and 2) the roller link.
Both
links get their linear strength from the side plates that keep them
together. A "Heavy Duty" chain will have thicker, stronger side
plates and thus greater overall strength. The pin link is very simple in
design having only two rods or pins connecting the side plates. The roller
link is more complex, consisting of two hollow bushings connecting the
side plates surrounded by a movable roller.
There
are several types of drive chains to cope with everyday cycling,
industrial applications, to racing superbikes:
Standard:
as described above.
Common
Drive Chains
Chain
reference #
Pitch
Width
415
1/2
inch
3/16
inch
420
1/2
inch
1/4
inch
428
1/2
inch
5/16
520
5/8
inch
1/4
inch
525
5/8
inch
5/16
inch
530
5/8
inch
3/8
inch
630
3/4
inch
3/8
inch
O-Ring:
similar to the standard but equipped with a rubber o-ring at each end
of the pin. This o-ring traps in lubricant and keeps out road grit and
moisture, thus prolonging the life of the chain.
Self-Lubricating:
these chains incorporate oil-impregnated sintered metal bushings
inside the rollers that gradually release oil to the chain.
Master link: most
vehicle chains are connected into a loop by a master link. This is a
single pin link with
extended
pins that allow the attachment of a removable side plate. The side plate
is held in place by a spring clip.
Endless
Chain: some vehicles are equipped with an endless chain that does
not contain a master link but are connected back unto itself when
produced. These chains must be removed by removing the swingarm of the
bike.
Maintenance:
The
more you care for your chain, the longer it will last. In this case
where high pressures are applied for short duration, lubrication is
important. After each run in adverse salt or dusty conditions the
final drive should be cleaned and lubricated.
remove
the chain from the vehicle and soak in kerosene (I know gasoline will
also clean a chain but due to its fire potential, use kerosene).
if
road grime and slight rust is a problem, scrub lightly with a hard
bristle or metal brush.
hang
the chain over the pan of kerosene and drip dry.
work
your way down the chain testing the rollers and flexibility between
each link. If you find links that will not flex
freely even after forcing them, the chain needs replacing.
place
the chain on the floor and measure out 1 foot. Grab the chain at each
end of this foot length and push the chain links together. Now pull
outward on the chain and note any change in its length. It is
recommended that this movement be no more than 1/4 inch. Check the
rest of the chain in 1 foot lengths. If the
slack is more than 1/4 inch for any foot, the chain should be replaced.
relube
the chain.
This
is commonly done by using one of the aerosol can chain lubes
available. CAUTION: if your chain is of o-ring
design, make sure the chain lube is compatible.
A
second way to lube your chain is by purchasing a can of solid lube.
This material has to be heated, melting the solid, and the chain
dipped in. The chain is hung over the can and allowed to drain and
harden. This form of lube is longer lasting and will protect your
chain the most.
reinstall
your chain and set the slack to your manuals specs. If
the chain adjuster on your rear axel indicates that the chain needs
replacing, do so.
the
master link spring clip open end MUST face away from the direction of
rotation.
Sprockets
Whenever you check your chain, check your rear and drive sprockets also.
The teeth on both sprockets should be uniform and symmetric. If they
appear hooked or worn, they probably need replacing. Grant you, not
an easy thing to do between land speed record runs.
1.Standard
2.Strands
3.Select
a chain
4.Select
Centre Distances
Currently
Selected Chain
Chain
Description
Selection
Data
Enter
Data Here
110166
ISO 606
32B-1 Bush Roller Chain
Selected
For/Customer :
Input
Power
KW
Input Speed
rpm
Drive Teeth Z1
Driven Teeth Z2
Drive Load
Driven Load
Calculated
Data
Chain Pitch
2.000 Ins
50.80 mm Ratio
:1 Output Speed
rpm Max Speed
380 rpm
Centre Distance
mm
Links
Date
Created :08/22/2004
Selected By :
Application :
Email address: Summary Data
Corrected Power: 10.00
KW
Max power at this speed: KW
Power Deviation: %
Chain Velocity: m/s
Bearing Pressure: N/mm˛
Safety Factor: :1
Approx Wear Life: hours
Approx Fatigue Life: hours
If
your land speed record car cannot refuel itself like this, you are
at a huge disadvantage. Blueplanet is around 66% the weight of a
car that does not have cartridge exchange refueling for the same
performance.
Blueplanet
has inbuilt battery loaders. It does not need a
complicated
service station to refuel itself in under 2 minutes.