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Messages - harvestbarn

#1
Drill Bit Sharpening / Re: The DBS-22 learning curve
April 17, 2015, 01:17:21 AM
One is aiming for an angle of between 10 to 15 deg  from the cutting edge to the end of the lip clearance while maintaining both cutting edges the same length.

This will only provide a chisel edge not the 4 facet point that the DBS-22 is capable, it has been very interesting hearing the comments from users thanks to all who have contributed.  I do not yet have a Blackstone Silicon grindstone which I suspect is needed for sharpening drill bits on the Tormek.

Garth

#2
Drill Bit Sharpening / Re: The DBS-22 learning curve
April 16, 2015, 01:00:17 PM
Picture of Drill Jig
#3
Drill Bit Sharpening / Re: The DBS-22 learning curve
April 16, 2015, 12:50:40 PM
To sharpen my drills I use a jig I designed, I was finding it difficult to get the angles accurate by hand. I have just tried the base of the scissor drill set at 59 deg. To use you place the cutting edge at 90 deg and grind then push outwards and downward to cut the clearance. This worked on the Tormec but it was very slow cutting even though the wheel was course dressed on the 6mm dormer drill I tried.  Will send a picture of my jig shortly .

Garth



#4
Yes I guess aluminum could be used thick enough to counter sink the fixing screws, would this be an improvement?  The felt is a good idea but I guess 50mm  pvc tape or duct tape would also work well.  I use duct tape on pump pliers to achieve a similar result.
#5
Thanks Stig that is interesting this knife is one of the few Global knives that has such a long and flexible blade. 

The Scissor Jig SVX150 is on order and I am going to modify it similar to that shown in  Herman`s video.   A piece of stainless steel is also coming for the base.

I also sharpen  1908 Sabers for the sport of Tent Pegging and feel this modified jig will be a great help.

Pictures show orange cutting normally two targets carried out at a gallop.


#6
Thanks Herman that was a very good and informative video.  I am sure I will find your jig very useful.  Have you published a picture of your latest version I would love to see it.

Garth
#7
Thank you for your response Herman I will obtain the SVX150 and make a jig to sit on it.  Have you tried it with such a long knife?

Thanks Ken the knife has about 30 cm of cutting edge and a blade width from 20mm reducing to14mm which is rather narrow.  I did not feel the long knife jig was very suitable.  There is no connection with any other posts, I am new to this forumn and the only other related post I found had no obvious answer.  Sorry if I have missed anything perhaps you could steer me to it?

While I acheived a sharp edge the ground bevel is not perfect along the entire length. It took some time with regular dressing as the steel is harder than many of my other knives.

Is a spell checker available?

Garth
#8
I have  just  purchased the T7 and also have the planer iron jig. This knife although fairley parellel is not towards the end so I was unwilling to try it in the planer jig.  I ended up sharpening it free hand is there a better way?  I have seen the post for a home made rest used with the SVD -110 is this a likly solution for thin flexible blades.