Florian F Fortner 127 Posted March 3, 2017 Share Posted March 3, 2017 (edited) The scrapers that have been posted so far all have the handle in the plane of the blade. This design is, however, not very suitable to apply even pressure in the lateral direction (prone to left-right wobbling) and the tracking of the scraped line is not that good. I built a new one that has balls of steel - handles on either side of the tool, a universal slot that can take lathe bits and self made tools made of pieces of old files and a guide on either side that is free of any wobbling (made of brass to conserve the U-profile that holds the blade). With this tool it's possible to make fullers (even double or triple fullers as common in rapiers, which need very high precision), hollow-scrape blade bevels, and the fuller-like hollow shapes in the ricasso of rapiers and swords (up to a certain width only, I doubt it will work over 20mm width). In the following pictures I am doing a parallel fuller (the WIP of this rapier will come up shortly) which tapers along the length, yet stays parallel with just a slight ridge between the fullers. For this the blade is clamped at a slight angle on the jig. This jig is actually the same I use for all grinding, it has adjusting screws every 10cm, to level out the distal taper and ensure that the blade lies down flat on the surface. To have a crisp end of the fuller, I just clamp a mechanical stop onto the jig, so the scraper will always stop in the same spot. Edited March 3, 2017 by Florian F Fortner 3 Link to post Share on other sites
Brian Dougherty 1,171 Posted March 3, 2017 Share Posted March 3, 2017 Nice idea. Thanks for sharing it. I am going to have to try something similar. Link to post Share on other sites
JJ Simon 123 Posted March 3, 2017 Share Posted March 3, 2017 Nice fixture, thanks for the share. Link to post Share on other sites
Alan Longmire 2,739 Posted March 3, 2017 Share Posted March 3, 2017 Excellent modification! Thanks for posting it. Link to post Share on other sites
Niels Provos 165 Posted March 4, 2017 Share Posted March 4, 2017 I like it. That's looks very useful. Share a video of it in action :-) Link to post Share on other sites
GEzell 136 Posted April 5, 2017 Share Posted April 5, 2017 Very nice, I love the accuracy of it. I assume the cutting edge is oriented at 90°? Link to post Share on other sites
Florian F Fortner 127 Posted November 23, 2018 Author Share Posted November 23, 2018 After doing more swords with different fuller demands I modified the device a bit. Now with the help of brass spacers, I can offset the chisel sideways, which is helpful for multiple fullers. The chisel made out of old files cut a lot better than industrial lathe bits. The ideal chisel blade angle is about 70°, a lot more than lathe bits. So the scraper can be held horizontally, which is easier to maintain. 1 Link to post Share on other sites
James Higson 83 Posted November 25, 2018 Share Posted November 25, 2018 Great, I hope you don't mind if I make one identical! The highest form of flattery and all that Link to post Share on other sites
AJ Chalifoux 57 Posted June 26, 2019 Share Posted June 26, 2019 Has anyone ever tried using one of these for the same purpose? I was going to build one, but if this works, why not? I suppose there's no centering features built in, but that seems easy to add with a few tapped holes and angle iron. https://www.amazon.com/Taytools-468334-Router-Ductile-Hardness/dp/B07GW7X35P/ref=asc_df_B07GW7X35P/?tag=hyprod-20&linkCode=df0&hvadid=309763890402&hvpos=1o4&hvnetw=g&hvrand=4012042591667662875&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9003322&hvtargid=pla-569147430190&psc=1 Link to post Share on other sites
GEzell 136 Posted June 26, 2019 Share Posted June 26, 2019 1 hour ago, AJ Chalifoux said: Has anyone ever tried using one of these for the same purpose? I was going to build one, but if this works, why not? I suppose there's no centering features built in, but that seems easy to add with a few tapped holes and angle iron. https://www.amazon.com/Taytools-468334-Router-Ductile-Hardness/dp/B07GW7X35P/ref=asc_df_B07GW7X35P/?tag=hyprod-20&linkCode=df0&hvadid=309763890402&hvpos=1o4&hvnetw=g&hvrand=4012042591667662875&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9003322&hvtargid=pla-569147430190&psc=1 It's the same basic concept, though that cutter would need modifications to cut annealed steel. Link to post Share on other sites
Alan Longmire 2,739 Posted June 26, 2019 Share Posted June 26, 2019 Plus I don't think that one offers enough support to prevent blade chatter. Link to post Share on other sites
AJ Chalifoux 57 Posted June 26, 2019 Share Posted June 26, 2019 True. There are larger ones that look more stable, but with more expense and having to adapt bits to work, at what point is it not worth it anymore? Link to post Share on other sites
Alan Longmire 2,739 Posted June 26, 2019 Share Posted June 26, 2019 I think that point is when you realize it would be cheaper and easier to make it from scratch. Link to post Share on other sites
Brian Madigan 17 Posted May 7, 2020 Share Posted May 7, 2020 Old files are great for making scraper profiles. I would think HSS bits would work better, but I don't think they're much harder in the first place. Just more heat resistant. I was scraping a hardened and tempered blade with a cheap carbide grout removal tool, which hasn't chipped or rounded over yet: It even has 3 different profiles! I push it to scrape, rather than pull. The flats are useful too for scraping ... flats. For curved single edge swords I usually have to follow the curve of the spine. Link to post Share on other sites
Kevin Colwell 143 Posted May 8, 2020 Share Posted May 8, 2020 interesting thread. I was just posting about using old files to make tools. This is a great take. I just use a variable speed electric die grinder, hose clamps, and a brazing rod bent to form a guide finger. But, the fuller has to follow either the spine or the edge, or I have to make a guide piece/fence. I like the guide rails on this. Link to post Share on other sites
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