Why doesn't it work?

Bill

On Saturday, 15 October 2016 03:30:21 UTC+1, Bill Wright wrote:
Why doesn't it work?

Bill

Thanks for the prompt - just bought these.

http://amzn.to/2e10ymX

On Saturday, 15 October 2016 03:30:21 UTC+1, Bill Wright wrote:
Why doesn't it work?

Bill

Scissor blades are twisted, curved, bent and often hollow ground.
All need to be right for them to work correctly.

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap bigger,
not smaller

tim

You need to sharpen the side awayfrom the parts that slide and also make
sure the parts that slide slide without any gaps.
Many cheap scissors are made of such rubbish material and are mechanically
poor that its better to bin them and get some new ones.
Brian

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"Bill Wright" wrote in message
...
Why doesn't it work?

Bill

In article , tim...
wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the
full length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger, not smaller

Then you don't sharpen both 'sides' of the blade. Like you'd do with a
knife.




--
*I didn't fight my way to the top of the food chain to be a vegetarian.

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

In message , Huge
writes
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap bigger,
not smaller

Not if you sharpen them correctly.

Also the user applies force when cutting to bring the blade edges close.
Think why left and right handed scissors:-)



--
Tim Lamb

"Huge" wrote in message
...
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the
full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger,
not smaller

Not if you sharpen them correctly.

well obviously

you need a special tool to sharpen them in parallel

sticking each one on a grinding wheel/pad separately, ain't gonna work

tim

On 15/10/2016 18:44, tim... wrote:

"Huge" wrote in message
...
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the
full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger,
not smaller

Not if you sharpen them correctly.

well obviously

you need a special tool to sharpen them in parallel

sticking each one on a grinding wheel/pad separately, ain't gonna work

I remember that my kids' primary school decided to raise some money by
doing odd jobs,including knife sharpening. I remember that there was
some talk about them ruining some scissors.

Having said that, don't all scissor blades have an inside and an outside
edge? The inside edge being where the two blades meet, and the outside
edge being the bevelled part of that edge. Can't you sharpen the
bevelled outside edge without any special tools?

I really couldn't think of a better way to explain that!

tim... wrote:
"Huge" wrote in message
...
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along
the full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger,
not smaller

Not if you sharpen them correctly.

well obviously

you need a special tool to sharpen them in parallel

Yep, a hand powered and controlled simple flat file is the "special tool" -
or even a stone, flat sharpening slip matched with a touch of oil - see
https://www.sharpeningsupplies.com/A...tone-P378.aspx

Caash

Cash

"tim..." wrote in message
...

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the full
length of the blades as as close to zero as possible

There is no gap if the scissors are sharpened properly, with the part of the
blade that meets with the other one being ground back so the width of the
blade in the widest part is reduced and not the thickness of the blade.

when worn out,

He isnt talking about it not working when worn out.

sharpening each blade individually will make that gap bigger, not smaller

Thats not right when the scissors are sharpened properly with
the width of the blade reduced marginally and not the thickness.

"tim..." wrote in message
...

"Huge" wrote in message
...
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the
full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger,
not smaller

Not if you sharpen them correctly.

well obviously

you need a special tool to sharpen them in parallel

Nope, just remove the correct bit of the metal, the bit
that is across the body of the blade, where it slides
past the other blade as the scissors are used.

sticking each one on a grinding wheel/pad separately, ain't gonna work

Works fine when you remove what should be removed.

"GB" wrote in message
...
On 15/10/2016 18:44, tim... wrote:

"Huge" wrote in message
...
On 2016-10-15, tim... wrote:

"Bill Wright" wrote in message
...
Why doesn't it work?


because scissors work by having the gap between the blades, along the
full
length of the blades as as close to zero as possible

when worn out, sharpening each blade individually will make that gap
bigger,
not smaller

Not if you sharpen them correctly.

well obviously

you need a special tool to sharpen them in parallel

sticking each one on a grinding wheel/pad separately, ain't gonna work

I remember that my kids' primary school decided to raise some money by
doing odd jobs,including knife sharpening. I remember that there was some
talk about them ruining some scissors.

Having said that, don't all scissor blades have an inside and an outside
edge? The inside edge being where the two blades meet, and the outside
edge being the bevelled part of that edge. Can't you sharpen the bevelled
outside edge without any special tools?

Corse you can.

I really couldn't think of a better way to explain that!

Its pretty decent, tho a picture would have been
useful with the bit to remove colored etc.

On 15/10/2016 03:30, Bill Wright wrote:
Why doesn't it work?

Bill

Big scissors AKA garden shears are easy to sharpen.
Grind at 90 degrees to a grinding wheel and the wheel i.e. inside face
of the blades flat against the grinding face of the wheel, will give a a
hollow ground finish. The final adjustment is to slightly tweak both
blades in a vice so they curve towards each other and contact with just
enough pressure at the point the blades meet then come away from one
another as the cutting point moves further along the blades.

Scissors are just small shears are they not?

On Saturday, 15 October 2016 03:30:21 UTC+1, Bill Wright wrote:
Why doesn't it work?

Bill

Simply grind off all the metal that doesn't look like part of a pair of sharp scissors!