Tormek Community Forum

In the Shop => Knife Sharpening => Topic started by: kwakster on September 01, 2024, 04:35:42 PM

Title: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:35:42 PM
This traditional Argentinian Ju-Ca brand fixed blade belongs to a friend of a friend, and as you can see the point was broken off and the handle was also in need of a bit of TLC.

Website of the Argentinian father & son team, who have been making these knives since 1959: http://ju-ca.com.ar/

(https://i.ibb.co/XXyFWvb/GEDC4880.jpg) (https://ibb.co/zs8Pm0r)
(https://i.ibb.co/vZj1kFj/GEDC4881.jpg) (https://ibb.co/9srnWDr)
(https://i.ibb.co/23djCbc/GEDC4882.jpg) (https://ibb.co/5hL5S7s)
(https://i.ibb.co/zm4CXCd/GEDC4883.jpg) (https://ibb.co/QJKhPh0)
(https://i.ibb.co/SB3Wqch/GEDC4884.jpg) (https://ibb.co/L1Zb4rL)
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:36:25 PM
Wet ground a new point & a rough new swedge on the side of my Tormek SB-250 Blackstone (black silicon carbide):

(https://i.ibb.co/S06CXRt/GEDC4885.jpg) (https://ibb.co/xG2TSJ1)
(https://i.ibb.co/FVPLtMX/GEDC4886.jpg) (https://ibb.co/yS3cJ1p)
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:36:57 PM
The first leather washer had rotted and had to be removed.
Then the gap was sanded, cleaned, and filled with some JB-Weld.

(https://i.ibb.co/z8THkhB/GEDC4887.jpg) (https://ibb.co/B45K1VQ)
(https://i.ibb.co/zWMbnkD/GEDC4888.jpg) (https://ibb.co/qLS9yZV)
(https://i.ibb.co/TYWRgLT/GEDC4889.jpg) (https://ibb.co/VJwDqmN)
(https://i.ibb.co/9bDxTTh/GEDC4890.jpg) (https://ibb.co/pf7HzzQ)
(https://i.ibb.co/Fwrnvcv/GEDC4891.jpg) (https://ibb.co/cFBx5R5)
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:37:29 PM
New JB-Weld "washer" sanded flush, and the blade hand reground to it's original full convex shape on the green silicon carbide side of the Foss 7205 bench stone used with oil.

(https://i.ibb.co/NsChwkf/GEDC4892.jpg) (https://ibb.co/7XCc7TB)
(https://i.ibb.co/j4GL722/GEDC4893.jpg) (https://ibb.co/4NMjBGG)
(https://i.ibb.co/Sc6Xysz/GEDC4895.jpg) (https://ibb.co/5k1W4MP)
(https://i.ibb.co/c3kkQ0K/GEDC4897.jpg) (https://ibb.co/9gccW6m)
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:38:04 PM
Blade & swedge colored with a blue magic marker before refining step with 1000 grit wet & dry SiC paper, used with oil on glass.

(https://i.ibb.co/NxYxWPg/GEDC4901.jpg) (https://ibb.co/R2H2QmG)
(https://i.ibb.co/thnj3r2/GEDC4902.jpg) (https://ibb.co/dcXC7Yp)
(https://i.ibb.co/t3HHTw2/GEDC4899.jpg) (https://ibb.co/PtrrvsW)
(https://i.ibb.co/k9GnH3V/GEDC4900.jpg) (https://ibb.co/TbwXvKD)

After the refining step:

(https://i.ibb.co/ZgXKnD1/GEDC4903.jpg) (https://ibb.co/LgR6L7h)
(https://i.ibb.co/LJBB39S/GEDC4904.jpg) (https://ibb.co/61GGkDY)
(https://i.ibb.co/cQ93s0K/GEDC4905.jpg) (https://ibb.co/w4qg2VZ)
(https://i.ibb.co/C6Rs18b/GEDC4906.jpg) (https://ibb.co/2SGYnhv)
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: kwakster on September 01, 2024, 04:38:42 PM
Handle parts & washers fine sanded, polished and waxed, filework & swedge also polished a bit & the blade stropped on hard cardboard with 1.0 micron diamond compound to remove the burr.

(https://i.ibb.co/gtkxsMz/GEDC4907.jpg) (https://ibb.co/nQxFhsz)
(https://i.ibb.co/bsNvhcQ/GEDC4908.jpg) (https://ibb.co/VgMCyfJ)
(https://i.ibb.co/xMgf3rJ/GEDC4910.jpg) (https://ibb.co/30FMkPB)
(https://i.ibb.co/svMVv5T/GEDC4913.jpg) (https://ibb.co/ynbQnhz)
(https://i.ibb.co/k05bF8q/GEDC4909.jpg) (https://ibb.co/q97qwsm)
(https://i.ibb.co/yWZw7LL/GEDC4916.jpg) (https://ibb.co/PwP70BB)
(https://i.ibb.co/5cStdp6/GEDC4917.jpg) (https://ibb.co/C0YNqCz)
(https://i.ibb.co/F6Z8zVq/GEDC4919.jpg) (https://ibb.co/SNYVBr7)

Specs:

Overall length: 20,9 cm (8.23 inches)
Blade length after the regrind: 10,0 cm (3.94 inches)
Max blade thickness: 3,1 mm
Brale grind: full convex zero edge
Blade steel: forged 1045 carbon steel
Handle materials: 1 x JB-Weld/Leather/Brass washers, cowbone, Argentinan hardwood, brass pommel
Sheath: brown leather (left-hand model)
Weight (knife only): 98 grams
Weight (knife + sheath): 120 grams
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: Ken S on September 01, 2024, 06:23:01 PM
Well done, Kwakster!

Ken
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: John Hancock Sr on September 02, 2024, 01:13:22 AM
Beautiful restoration. Lovely knife.
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: tgbto on September 02, 2024, 11:43:42 AM
Very nice work, congrats !
Title: Re: Argentinian Ju-Ca small fixed blade regrind & TLC
Post by: Ken S on September 02, 2024, 05:40:50 PM
This beautiful restoration by Kwakster reminds me of the need for thinking on various levels. This impeccable work is far removed from the work needed from the busy farmers market of large contract sharpener. I am not denigrating this busier word, just stating the obvious in terms of expectations. As Tormek might say, it cuts the tomato, and cuts it well. That is the objective, not creating a show piece.

Longtime members may remember the restoration Jan did on his grandfather's chisel. It was truly a labor of love. There is room in the Tormek spectrum for both restoration and workaday sharpening, as well as for crossover work. 

Kwakster lets us see the inner artist.

Ken