PDA

View Full Version : Leather Strop



Marten
02-17-2014, 03:33 PM
Good afternoon.

I have done a few searches on the Forum but to no avail unfortunately and therefore thought that I might ask the question outright...
Any idea where I might be able to obtain a leather strop please? Currently I am making use of an old belt but that is obviously not the ideal.

Thank you in advance.

Marten.

Clive Mechanic
02-17-2014, 04:44 PM
HI Marten

you can make one yourself fairly easily. here's a link to BF that might help http://www.bladeforums.com/forums/showthread.php/640503-Make-a-leather-strop

The leather belt will work fine but some vegetable tanned leather would be best. just glue the leather (smooth side up) or belt to a block of wood and you're ready to go.

Cheers

Clive

MadRookie
02-17-2014, 05:15 PM
Tip, first glue a piece of float glass to the wood, then the leather on top of the glass.

I have found that after time, the wood warps & is not perfectly flat anymore (especially on larger strops).

This is what mine looks like...


http://i126.photobucket.com/albums/p114/MadRookie/IMG_2640_zpsf8d8a1c2.jpg (http://s126.photobucket.com/user/MadRookie/media/IMG_2640_zpsf8d8a1c2.jpg.html)



http://i126.photobucket.com/albums/p114/MadRookie/IMG_2639_zps2919992c.jpg (http://s126.photobucket.com/user/MadRookie/media/IMG_2639_zps2919992c.jpg.html)



http://i126.photobucket.com/albums/p114/MadRookie/IMG_2635_zpsd2dec2bc.jpg (http://s126.photobucket.com/user/MadRookie/media/IMG_2635_zpsd2dec2bc.jpg.html)


:)

Chui
02-17-2014, 06:20 PM
- one of the easiest and cheapest bases for a strop is mdf..........just ensure it is the impregnated water-resistant variety.

And, one of the very best things to use as a strop is denim glued to a piece of mdf - amazing results...

oubaas jordaan
02-17-2014, 07:46 PM
2 questions please:
1. What is float glass?
2. What is mdf?

Chui
02-17-2014, 07:49 PM
2 questions please:
1. What is float glass?
2. What is mdf?

1. term used for glass production whereby the glass is allowed to solidify upon a layer of molten metal..........comes out rather flat!

2. medium density fibreboard - used in making furniture a great deal

marthinus
02-17-2014, 07:55 PM
Good afternoon.

I have done a few searches on the Forum but to no avail unfortunately and therefore thought that I might ask the question outright...
Any idea where I might be able to obtain a leather strop please? Currently I am making use of an old belt but that is obviously not the ideal.

Thank you in advance.

Marten.

Marten, where are you located?

I know of a leather supplier in Silverton called leatherrite. You can get some vegetable tanned leather there for a small price, just have to look at their offcuts. Makes a really good strop.

Henre
02-17-2014, 10:17 PM
Just bought a sheet of veg tanned belly hide from woodheads in CT they also sell offcuts per kilo. A sheet of shoulder should be enough for about 200 strops should you be so inclined, could even get a few sheaths done ;)

MadRookie
02-18-2014, 06:42 AM
Yep, got my leather at Woodheads too.

:)

Francois M
02-18-2014, 07:19 AM
I was told by and old timer that strops used to be made of Horse hide as it more abrasive than Cow hide can anybody confirm or shoot it down, Just as a matter of intrest and to find out

marthinus
02-18-2014, 10:24 AM
I was told by and old timer that strops used to be made of Horse hide as it more abrasive than Cow hide can anybody confirm or shoot it down, Just as a matter of intrest and to find out

From looking at a few online strops for razors one can find horse leather used, however, as to being more abrasive I do not know.

Personally one should be careful not to over strop. I have seen a few people over strop a knife and ended up with a dull edge. This is usually because people apply to much pressure. Here is a great illustration on stropping and things to be careful of.


A lot of people have noticed that stropping can make an edge duller as well as sharper. Some say you need a lot of pressure, some say you need no more than the weight of the knife. Actually, you need to get the right combination of angle and pressure.
I tried to capture this relationship visually:
The black string represents the surface of the leather strop. The wood represents the edge. It is cut to a 30-degree inclusive angle, a popular edge angle for knives with good steel. Ideally, you want the string parallel with the edge bevel.

First: Proper angle and very little pressure on the strop. With very little pressure, the leather is not depressed significantly and dragging the edge over the strop at the sharpened angle sharpens the entire edge bevel without rounding the edge. People who say you need little pressure are using the correct sharpening angle. Notice the string is parallel with the edge bevel.
http://i121.photobucket.com/albums/o225/josey_photo/DSC01609.jpg

Second: This shows the angle of the knife held too high on the strop, rounding the edge. This is wrong no matter what the pressure.
http://i121.photobucket.com/albums/o225/josey_photo/DSC01610.jpg

Third: This shows the edge held at too shallow an angle, with little pressure applied. This combination of angle and pressure rounds the shoulders of the edge bevel without affecting the edge.
http://i121.photobucket.com/albums/o225/josey_photo/DSC01611.jpg

Fourth: This shows the angle held too shallow, but with a lot of pressure. The pressure compensates for the incorrect angle and the edge is sharpened. Notice the string is parallel with the edge bevel. This combination will sharpen well. People who use a lot of pressure, are using a shallow stropping angle.
http://i121.photobucket.com/albums/o225/josey_photo/DSC01612.jpg


Finally: This shows the correct sharpening angle, but with a lot of pressure. The extra pressure causes the stopping leather’s surface to drag around the edge, dulling it.
http://i121.photobucket.com/albums/o225/josey_photo/DSC01613.jpg

MadRookie
02-18-2014, 10:44 AM
Horsehide has a finer grit than cowhide and depending on the edge type to be stropped will lean towards either horse or cow.

I prefer cow as my stropping is maxed to 1µ...sometimes maybe 0.25µ....and it works great, but then again that is loaded with polycrystalline diamond spray.

The above for kitchen knives - I know the razor guys prefer clean leather be it cow or horse.


:)

Yosarian
02-18-2014, 11:19 AM
I have a couple strops from Longstrider that have are goat hide. His reasoning was that it is thinner then cow or horse so deforms less both making it less likely to round the edge and allows slightly more pressure to be used.

Madrookie - I notice your strops have the smooth side of the leather on the outer, all mine have the napped, or suede side up, can you say a little about what compound you use if any.

MadRookie
02-18-2014, 11:58 AM
I do not use clean leather for stropping anymore, as its sole purpose is straightening the edge apex - my knive edges are mostly straight & where not will get the same benefit stropping on loaded leather, with the addition of some sharpening too.

I use mostly Boron Carbide paste & Polycrystalline Diamond spray - they abraid quick and in 1µ leave a seriously frightening edge.....

Although I have sprays right down to 0.025µ in poly diamond - reserved for those "bragging rights" edges which have shortened longevity in real world application - 1µ is the norm by me.

:)

Marten
02-18-2014, 04:37 PM
Hi Guys.

My apologies for being so quiet. Bit overwhelmed at work right now.
Thank you indeed for all the responses.
Marthinus, I am situated in Heidelberg, Gauteng... Also, your pics are rather insightful. Thank you very much.
MR, those look amazing. Damn good idea that!
Thank you for the link Clive.

Where do you obtain your compound please MR?

MadRookie
02-18-2014, 09:18 PM
"Where do you obtain your compound please MR? "


Here : http://www.chefknivestogo.com/podisp.html

I know the owner well due to many, many purchases, can bring it in for you if so required??

Let me know...


:)

Marten
02-20-2014, 09:35 AM
Geez! That is very kind of you MR!
Tried sending you a PM but I believe that your Inbox is a bit full...:lol:

Thank you for your kind offer...

MadRookie
02-20-2014, 10:14 AM
Ok Marten - Inbox cleared.

:)

Eldergeek
03-15-2014, 09:28 PM
Picked up a piece of leather today and a MDF strip, and created a two sided strop, used red and black compound separately , stropped a few blades today.
Looking good...
Thanks for the tips everyone!