2
210061741
Guest
More chain wear info.
2
210061741
Guest
Drive Specs 10t - 18t
See attached.
See attached.
2
210061741
Guest
Motor to Jackshaft Chain Selection
Here is a great choice for the motor to Jackshaft chain.
It will require a new sprocket at the motor.
Roller Chain Renold Synergy ANSI 35 (ISO 606) duplex
Serial Number : 125037
The advantages
#1 Allows us to go to a 15T Motor Sprocket.
#2 Allows us to use a 24T Jackshaft Sprocket.
This will be quieter,and can handle the stress.
This will also be smoother running. / Less Vibration.
#3 The pressure at the pin joint is greatly reduced and well within limits.
#4 The Jackshaft rpm will be 685.63 Rpm which will help us reduce the torque at the Freewheel.
#5 The chain might just outlast the bike.
#6 We can get the chain assembled to the needed length.
The Disadvantagesn)
#1 Expensive. We need a little over a foot. about $50 for the chain.
#2 We need to fit the motor with a 15T dual sprocket.
Alternative.
We could use std #35 2 stranded chain.
Our configuration sets us well within the specs.
It depends on how long you want it to last.
Personally i would like to assemble it and not have to worry about it at all.
If you end up replacing the chain it will cost more in the long run.
Look at the cost of a NuVinci Hub.
Quality components aren't cheap.
I promise this chain won't break and hurt you.
The #40 or even worse a Bicycle chain COULD.
WHAT DOSE IT COST FOR AN EMERGENCY ROOM VISIT FOR A SMASHED FACE??
Look at the Bright Side.
We have all winter.
@ least we can buy are components 1 at a time.
It'll look cool as HE**.
Here is a great choice for the motor to Jackshaft chain.
It will require a new sprocket at the motor.
Roller Chain Renold Synergy ANSI 35 (ISO 606) duplex
Serial Number : 125037
The advantages
#1 Allows us to go to a 15T Motor Sprocket.
#2 Allows us to use a 24T Jackshaft Sprocket.
This will be quieter,and can handle the stress.
This will also be smoother running. / Less Vibration.
#3 The pressure at the pin joint is greatly reduced and well within limits.
#4 The Jackshaft rpm will be 685.63 Rpm which will help us reduce the torque at the Freewheel.
#5 The chain might just outlast the bike.
#6 We can get the chain assembled to the needed length.
The Disadvantages
n)#1 Expensive. We need a little over a foot. about $50 for the chain.
#2 We need to fit the motor with a 15T dual sprocket.
Alternative.
We could use std #35 2 stranded chain.
Our configuration sets us well within the specs.
It depends on how long you want it to last.
Personally i would like to assemble it and not have to worry about it at all.
If you end up replacing the chain it will cost more in the long run.
Look at the cost of a NuVinci Hub.
Quality components aren't cheap.
I promise this chain won't break and hurt you.
The #40 or even worse a Bicycle chain COULD.
WHAT DOSE IT COST FOR AN EMERGENCY ROOM VISIT FOR A SMASHED FACE??
Look at the Bright Side.
We have all winter.
@ least we can buy are components 1 at a time.
It'll look cool as HE**.
2
210061741
Guest
Chain Data
Heres some great chain information
:donatello: BTW
We will configure this setup 3 ways.
The first will be the absolute best money can buy and expensive.
The second will be the most cost effective and still safe.
The cheapest possible soloution.
NO GUARENTEE THIS WON'T HURT YOU.
That way we will have options.
Heres some great chain information
:donatello: BTW
We will configure this setup 3 ways.
The first will be the absolute best money can buy and expensive.
The second will be the most cost effective and still safe.
The cheapest possible soloution.
NO GUARENTEE THIS WON'T HURT YOU.
That way we will have options.
Sounds really cool - but even if the shaft seized, chain derailed and lodged, etc - you are still freewheeling. In fact this is one of the safety reasons we designed the Shifter Kit in the first place. Can't say this for the stock China bolt on sprocket - sucker locks and at best you are skidding, worst well - "smashed face", death, etc....
BTW Don't forget your time at $60/hour!
BTW Don't forget your time at $60/hour!
2
210061741
Guest
A note about sprocket Teeth Count
- NUMBER OF TEETH - The fewer the number of teeth in
a sprocket, the greater the degree of articulation, the
higher the wear.
- NUMBER OF TEETH - The fewer the number of teeth in
a sprocket, the greater the degree of articulation, the
higher the wear.
Last edited by a moderator:
2
210061741
Guest
Why Calculate Pin Pressure is important.
Bearing Pressures
When a chain has been correctly selected, the mode of failure
over a very long period of time is most likely to be wear.
The subject of wear, which depends on many factors, has
been addressed earlier in this guide. However, a very useful
indicator of chain performance is the magnitude of pressure
between the key mating surfaces (i.e., pin and bush).
This pressure is known as the bearing pressure and is
obtained by dividing the working load by the bearing area.
Bearing areas for standard chains are quoted in the
designer data at the end of this guide.
Safety Factors
Applications vary widely in the nature of loads applied,
therefore, apply safety factors to allow for some degree of
abuse.:
A factor of safety of 8:1 in non-passenger applications
A factor of safety of 10:1 in passenger applications
Lower factors of safety than these may be used (except
for passenger applications), when careful consideration
of the maximum loads and health and safety implications
have been made.
:surrender:
Factors of Safety
All Renold Chain is specified by its minimum tensile
strength. To obtain a design working load it is necessary
to apply a "FACTOR OF SAFETY" to the breaking load.
However, before considering this, the following points
should be noted:
- Most chain side plates are manufactured from low- to
medium-carbon steel and are sized to ensure they have
adequate strength and ductility to resist shock loading.
- These steels have yield strengths of approximately
65 percent of their ultimate tensile strength. This means
that if chains are subjected to loads of greater than this,
depending upon the material used in the side plates,
then permanent pitch extension will occur.
- Most applications are subjected to intermittent dynamic
loads well in excess of the maximum static load and
usually greater than the designer's estimate.
- Motors, for example, are capable of up to 200 percent
full load torque output for a short period.
As a result, chain confidently selected with a factor of
safety of 8:1 on breaking load is, in effect, operating with
a factor of safety of around 5:1 on yield and much less
than this when the instantaneous overload on the drive is considered.
again
- Motors, for example, are capable of up to 200 percent
full load torque output for a short period.
As a result, chain confidently selected with a factor of
safety of 8:1 on breaking load is, in effect, operating with
a factor of safety of around 5:1 on yield and much less
than this when the instantaneous overload on the drive is considered.
STILL THINK THE CALCULATIONS ARE CONSERVATIVE.
To most im sure this post is very technically advanced.
The analysys of the system is very important.
Hopefully it is easy enough to see why.
Bearing Pressures
When a chain has been correctly selected, the mode of failure
over a very long period of time is most likely to be wear.
The subject of wear, which depends on many factors, has
been addressed earlier in this guide. However, a very useful
indicator of chain performance is the magnitude of pressure
between the key mating surfaces (i.e., pin and bush).
This pressure is known as the bearing pressure and is
obtained by dividing the working load by the bearing area.
Bearing areas for standard chains are quoted in the
designer data at the end of this guide.
Safety Factors
Applications vary widely in the nature of loads applied,
therefore, apply safety factors to allow for some degree of
abuse.:
A factor of safety of 8:1 in non-passenger applications
A factor of safety of 10:1 in passenger applications
Lower factors of safety than these may be used (except
for passenger applications), when careful consideration
of the maximum loads and health and safety implications
have been made.
:surrender:
Factors of Safety
All Renold Chain is specified by its minimum tensile
strength. To obtain a design working load it is necessary
to apply a "FACTOR OF SAFETY" to the breaking load.
However, before considering this, the following points
should be noted:
- Most chain side plates are manufactured from low- to
medium-carbon steel and are sized to ensure they have
adequate strength and ductility to resist shock loading.
- These steels have yield strengths of approximately
65 percent of their ultimate tensile strength. This means
that if chains are subjected to loads of greater than this,
depending upon the material used in the side plates,
then permanent pitch extension will occur.
- Most applications are subjected to intermittent dynamic
loads well in excess of the maximum static load and
usually greater than the designer's estimate.
- Motors, for example, are capable of up to 200 percent
full load torque output for a short period.
As a result, chain confidently selected with a factor of
safety of 8:1 on breaking load is, in effect, operating with
a factor of safety of around 5:1 on yield and much less
than this when the instantaneous overload on the drive is considered.
again
- Motors, for example, are capable of up to 200 percent
full load torque output for a short period.
As a result, chain confidently selected with a factor of
safety of 8:1 on breaking load is, in effect, operating with
a factor of safety of around 5:1 on yield and much less
than this when the instantaneous overload on the drive is considered.
STILL THINK THE CALCULATIONS ARE CONSERVATIVE.To most im sure this post is very technically advanced.
The analysys of the system is very important.
Hopefully it is easy enough to see why.
Last edited by a moderator:
2
210061741
Guest
Important Note
For factors of 5:1, the resulting bearing pressure is 50
percent higher than recommended. Chain working under
these conditions will wear prematurely, despite the type of
lubrication regime used.
For factors of 5:1, the resulting bearing pressure is 50
percent higher than recommended. Chain working under
these conditions will wear prematurely, despite the type of
lubrication regime used.
2
210061741
Guest
The Facts of Chain Drive Design
The Facts From The EXPERTS.
The Facts From The EXPERTS.
For sure, never ride a bike with a bolt on sprocket.
