T18 torque

[DanielOB]

can eccentric and angle chuch for T18 drill woth 18 V transmiit the highest torque T18 can deliver, and with breaking safety factor larger than 1.1

 

[Leifer]

(I don't know safety factor)
No, it won't have the same power with those attachments.
Adding additional gear turns (elements) always increases torque force at the source (motor), and reduces the torque output at the business end. Friction, wear, and "direction of momentum" are unavoidable.
I don't know if this is what you were referring to.

 

[AlexThePalex]

Both chucks can deliver all the torque the T18 has without problems.

Please ignore what Leifer says, might be true for a stepped gearbox, but both chucks just have a 1:1 ratio.

 

[mrboult]

You certainly don't have to hold back on power when using the right angle chuck. I have regularly used mine at full tilt in gear 1 never had any issues. (Same goes for the DRC/PDC drills)

 

[Phil Beckley]

Hi
All are 1:1 no loss of torque.
rg
Phil

 

[Leifer]

That is good to know.
I'll stand corrected, for now.

I was contemplating a theory like this:
If attaching several right-angle chucks to each other in a row (several bends), would the torque (or "power transmission") be reduced at the bit ?
It seems it would, for the several gear bends. If it does "for several", than it would be there for one.
But not likely noticeable with one gear bend (right-angle chuck) (and the eccentric chuck with two bends ??).
I forgot to take engineering or "gear theory" in college, so I am not sure of my idea.
I do hope I am mistaken, but it did cross my mind.
Thanks.

Edit: I have some very good "dial torque wrenches" up to 100 Nm. When I get my C18 set, I'll connect the eccentric to the right-angle chucks, and test them at a readable drill clutch setting.

 

[peter halle]

That is good to know.
I'll stand corrected, for now.

I was contemplating a theory like this:
If attaching several right-angle chucks to each other in a row (several bends), would the torque be reduced at the bit ?
It seems it would, for the several gear bends. If it does "for several", than it would be there for one.
But not likely noticeable with one gear bend (right-angle chuck) (and the eccentric chuck with two bends ??).
I forgot to take engineering or "gear theory" in college, so I am not sure of my idea.
I do hope I am mistaken, but it did cross my mind.
Thanks.

Edit: I have some very good "dial torque wrenches" up to 100 Nm. When I get my C18 set, I'll connect the eccentric to the right-angle chucks, and test them at a readable drill clutch setting.

I don't know what real life application you attempting to do, but you can't mount two right angle chucks to each other if that is what you are looking to do.

Peter

 

[Leifer]

I don't know what real life application you attempting to do, but you can' mount to right angle chucks to each other if that is what you are looking to do.
Peter

Not real-life....just proof of concept, is all. 
I don't have the tool(s) yet...this is just theory, and the concept should apply to any transferred geared rotation.
If there is any transmission loss with the x18 + the attachments...it likely would be very small, and un-noticeable.

Not trying to be argumentative, at all....just trying for accuracy. The gear ratio is 1:1.....meaning the spinning of the bit is 1:1 input to output, but may not relate to power ratio, because it's at the end of a chain of gears....aka "gear efficiency" .

I found this...

"The output power is the (input power - the power losses).  Power losses in gear systems are associated primarily with tooth friction and lubrication churning losses.    Churning losses are relatively independent of the nature of the gears and the gear ratios - they are primarily related to the peripheral speed of the gears passing through the fluid.  Churning losses are difficult to calculate and estimates based on experience are often used in initial gear design.  The frictional losses are related to the gear design,the reduction ratio,the pressure angle, gear size, and the coefficient of friction."
LINK

It's easy to forget that any connected gears are always plowing through lubricant, as are the bearings.

 

[Bohdan]

It's easy to forget that any connected gears are always plowing through lubricant, as are the bearings.

Only in an oil filled gearbox. Drill gears are usually greased and the excess grease is forced out of the gear teeth after the first rotation so it contributes little to the plowing effect. Same with ball bearings but I would suspect that these are bushes.

The net result is that the effect is very small and you probably wont be able to detect or measure it as a change in torque.

 

[sae]

It's easy to forget that any connected gears are always plowing through lubricant, as are the bearings.

Only in an oil filled gearbox. Drill gears are usually greased and the excess grease is forced out of the gear teeth after the first rotation so it contributes little to the plowing effect. Same with ball bearings but I would suspect that these are bushes.

The net result is that the effect is very small and you probably wont be able to detect or measure it as a change in torque.

They're most likely bevel gears though, which have an inherent loss of power because not all the forces are transmitted in the direction you want them to be in.

 

[Leifer]

Only in an oil filled gearbox. Drill gears are usually greased and the excess grease is forced out of the gear teeth after the first rotation so it contributes little to the plowing effect. Same with ball bearings but I would suspect that these are bushes.

The net result is that the effect is very small and you probably wont be able to detect or measure it as a change in torque.

I agree.......and the change of grease viscosity because of heat (friction), after a warm-up.
Is there an exploded drawing of any of Festool's angle attachments ?....shows the gearings or bearing types?

Again....all this likely means little, as this convo is for nerd's sake.
What matters is....if the drill works nearly or the same with an angle change attachment....and reports here say "yes".