The disc sander on my Draper belt & disc sander has been slipping. I thought
that this was the belt sander but tightening the belt had no affect. I then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a long
allen key?

Thanks

Kevin

Around 5 to 6 inches. I have some, they are good for getting more
torque.

On Sun, 12 Sep 2004 16:43:44 +0100, "Kevin Rayner"
wrote:

The disc sander on my Draper belt & disc sander has been slipping. I thought
that this was the belt sander but tightening the belt had no affect. I then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a long
allen key?

Thanks

Kevin

"Kevin Rayner" wrote in message
...
The disc sander on my Draper belt & disc sander has been slipping. I
thought
that this was the belt sander but tightening the belt had no affect. I
then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a long
allen key?

Thanks

Kevin


=================
Screwfix long series: Imperial = 1/16" = 3" - 3/8" = 7" . The metric part of
the set are shorter - 1.5mm = 45mm - 10mm = 115mm. Sizes in between in
proportion.

Cic.

In message , Kevin Rayner
writes
The disc sander on my Draper belt & disc sander has been slipping. I thought
that this was the belt sander but tightening the belt had no affect. I then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a long
allen key?

Not being funny, but it depends on the size (i.e. a 6mm one tends to be
larger than a 3mm one)

for normal long reach allen keys, somewhere between 4" and 6",
--
geoff

On Sun, 12 Sep 2004 16:43:44 +0100, "Kevin Rayner"
wrote:

The disc sander on my Draper belt & disc sander has been slipping. I
thought
that this was the belt sander but tightening the belt had no affect. I
then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub
screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a
long
allen key?

"Adrian" wrote in message
...
Around 5 to 6 inches. I have some, they are good for getting more
torque.

Not disagreeing of course, but from an engineering viewpoint, why is that?
I've often wondered as I reach for a longer screwdriver to shift a stubborn
screw, to which the same principle applies... From my A-level physics many
moons ago I remember that torque (Nm) = force applied (N) x radius (m); so
if the radius stays constant, how does torque increase? Isn't it
independent of shaft length according to this equation?

David

"Lobster" wrote in message
...
On Sun, 12 Sep 2004 16:43:44 +0100, "Kevin Rayner"
wrote:

The disc sander on my Draper belt & disc sander has been slipping. I
thought
that this was the belt sander but tightening the belt had no affect. I
then
realised that the disc itself was slipping on its shaft.There is an
inspection hole in the belt guard and I can see a socket headed grub
screw
but my allen keys are too short to reach.
Screwfix mention long allen keys in their catalogue but how long is a
long
allen key?

"Adrian" wrote in message
...
Around 5 to 6 inches. I have some, they are good for getting more
torque.

Not disagreeing of course, but from an engineering viewpoint, why is that?
I've often wondered as I reach for a longer screwdriver to shift a
stubborn
screw, to which the same principle applies... From my A-level physics
many
moons ago I remember that torque (Nm) = force applied (N) x radius (m); so
if the radius stays constant, how does torque increase? Isn't it
independent of shaft length according to this equation?

David


A question that has erked me for some time.
The only answer I could come up with is that we rarely have the sharp end of
the driver 100% in the screw slot and given an angle of perhaps 10 degrees
from the core of the screw we can impart
a significantly greater torque.


Arthur.

In article ,
Kevin Rayner wrote:
Screwfix mention long allen keys in their catalogue but how long is a
long allen key?

They vary with size - like spanners. However, there's only two common
sizes. B&Q had the long ones last time I looked in both metric and AF.

--
*Happiness is seeing your mother-in-law on a milk carton

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
Lobster wrote:
Not disagreeing of course, but from an engineering viewpoint, why is
that? I've often wondered as I reach for a longer screwdriver to shift a
stubborn screw, to which the same principle applies... From my A-level
physics many moons ago I remember that torque (Nm) = force applied (N) x
radius (m); so if the radius stays constant, how does torque increase?
Isn't it independent of shaft length according to this equation?

I *think* a longer screwdriver usually has a larger handle so you get
better purchase on it.

--
*The statement below is true.

Dave Plowman London SW
To e-mail, change noise into sound.

Lobster wrote:

"Adrian" wrote in message
...

Around 5 to 6 inches. I have some, they are good for getting more
torque.


Not disagreeing of course, but from an engineering viewpoint, why is that?
I've often wondered as I reach for a longer screwdriver to shift a stubborn
screw, to which the same principle applies... From my A-level physics many
moons ago I remember that torque (Nm) = force applied (N) x radius (m); so
if the radius stays constant, how does torque increase? Isn't it
independent of shaft length according to this equation?

You are right - the length makes no difference in the case of the
screwdriver (other than the fact the bigger driver may have a bigger
handle as Dave mentioned).

In the case of the Allen key however, I think you may have answered your
own question! You need to remember that the key is L shaped, and you can
use either the long or short section of the L to apply torque to the
bolt. Hence if you use the short part of the L, you are then applying
leverage to the long bit - say 4" on a typical key. A long reach key at
6" will therefore give you 50% more torque since your radius increases
by 50%


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Dave Plowman (News) wrote:
In article ,
Lobster wrote:

Not disagreeing of course, but from an engineering viewpoint, why is
that? I've often wondered as I reach for a longer screwdriver to shift a
stubborn screw, to which the same principle applies... From my A-level
physics many moons ago I remember that torque (Nm) = force applied (N) x
radius (m); so if the radius stays constant, how does torque increase?
Isn't it independent of shaft length according to this equation?


I *think* a longer screwdriver usually has a larger handle so you get
better purchase on it.


Or 2 hands (e.g. yankee driver)

--
Chris
-----
Spamtrap in force: to email replace 127.0.0.1 with blueyonder.co.uk