how to grind plunge lines

I hollow grind my blades first on a 14" wheel then switch to a 9" disk. rFor continuous, production-type centerless grinding, the thrufeed method is very effective. I never made a hollow grind before. The plunge line is that spot between the blade and the ricasso. In a Rösler plunge finishing system, the parts are attached to a high-speed rotating spindle, which is then lowered into a work bowl filled with grinding or polishing media. Use this circle as a guide for making the rest of the plunge cuts. Official Simple Little Life video of: Tool Time Tuesday - Knife makers plunge line grinding guide. This applies if you are grinding on a KMG type grinder. You then need to hang the belt off the platen approx 1/4" so that it can climb over the plunge line edge you just created while working your way back toward the guard keeping the grind angle the same. Sealing areas on spindles I always plunge grind. I have known about file guides for a while but have a hard time spending fifty dollars to get one. Then grind the edges smooth. Product Line Description. In this instance where the grind goes off the spine. If you are working with flat stock, and doing stock removal, you either try and grind an edge all the way back to the tang, or you have to stop somewhere, which gives you a plunge cut. Mark out the height of the desired bevels and plunge line on the blade with a marker or Dykem blue. Rectangular / Step Two: Plunge cut the back. browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. Plunge grinding on a cylindrical grinder IS NOT limited to short parts. Then use the length of that plunge cut to gauge the diameter of a second, larger circle. Stop and check often. The tricky part is you want the grind lines from the swedge to meet up perfectly with the grind line of the primary bevel. I am not increasing my price on these guides as it is time saving which makes it cost effective to me. The curve I'm referring to is the one on the left in pic attached (with red arrow). Creep feed grinding. Run the water in the sink closest to the toilet for about a minute. The heel encompasses a small section of the grind, the Plunge Line and the Ricasso. The plunge line takes some practice and some experiment. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. SAY "GOODBYE" TO UNEVEN GRIND LINES! With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. I was simply pointing out that, in my opinion, plunge cuts can and do often add a visually appealing element to a knife. Plunge grinding. I was reading the topic by Owen Bush about Plunge lines and posted a comment. Who knows when the first argument over the best blade grind started? Forge your ridge line in and since you are using a 1X 42 I wouldn't suggest trying to grind anything other than the profile. It produces a lot of heat and shitty finish and then you have to grind it as above to get a decent finish. AkWildman Well-Known Member. I am offering these guides with the C2 Carbide Blanks Surface Ground! Some blades may have a Choil. The plunge line can be transitioned into the blade in a gentle, curved fashion, or it can be ground flat, thus creating a straight or 90° transition. With a recent purchase of a little piece of the Alberta prairie, we're looking to sell our nice suburban home in search of a more meaningful life beyond chasing the \"American dream\" working for some big company and making someone else rich. You can also get a curved plunge line with a flat grind on the platen by lifting the handle end when you draw the blade across for the grind. For instance, the bevels on a Ka-Bar are fairly keen but the bevel only goes about halfway up the blade (roughly 1/8" stock). Another thing to think about when planning bevels and grind-lines, is the overall angle of the finished blade, compared to the thickness of the stock. Increase or decrease successive traverse rates to break pattern of diamond lines. Copyright © 2020 vBulletin Solutions, Inc. All rights reserved. Plunge grinding assures there are no spirals that can move oil past an oil seal. The bubbling is due to air trapped in the plumbing system. I hope this helps a little. Subscribe to Simple . Some blades may have a Choil. Grinding even plunge lines is one of the most difficult thing for the beginner to do well. The latest industry news—straight to your inbox. Use harder grade wheel. Uneven fine lines on work piece due to faulty dressing Do not allow diamond to dwell on wheel. A plunge line on a swedge works well on some designs but I wanted nice clean lines and angles sweeping back towards the handle. Midway Grinding Inc. offers centerless infeed grinding services with precision and accuracy that are second to none. If it has a radius, the plunge will have the curved feathering into the spine. Also, the finish on the bottom of the ricasso and choil area is often neglected. The cylindrical grinder is a type of grinding machine used to shape the outside of, 22 Inside diameter grinding 23 Plunge grinding 24 Creep feed grinding, OD grinding is grinding occurring on external surface a of an object between the centers, A form of OD grinding, however the major difference is that the grinding. Flip the tile over and plunge the cut from the back. The trick is to grind a standard plunge to the apex point of your sweep. Working on a few knives in this video including some tips on how to grind a kitchen (in this case a bbq meat slicing knife) with a hidden plunge line. I took two scrap pieces of aluminum that fit together very nicely and drilled one and drilled/tapped the other at the same spot. Plunge grinding machines may be used to surface finish high quality parts which must not touch each other during the finishing process. Creep feed grinding. First cylindrical grinding topic- plunge or in-feed grinding, Fabrication: CNC Laser, Waterjet, Plasma, Welding & Fab, Schaublin, Cazeneuve, Weiler, Graziano, Mori Seiki Lathes, Cincinnati Milacron, Kearney Trecker, VN, USA Heavy Iron, Machine Reconditioning, Scraping and Inspection, Tooling, Parts and Accessories For Sale or Wanted, Machinery Manual, Brochure and Photo Archives. Edited November 3, 2011 by bronzetools Oct 27, 2017 - For my current dagger project, I am worried about getting the plunge lines straight and equal; that and the edges of the ricasso where they meet the guard. Feed table more smoothly. The Plunge Line is where the grind stops and meets the edge, often at a right angle to the grind. At no time were we ever told or permitted to plunge grind on a surface grinder when virtually all types of grinding were done. From there, you can do a couple things. I grind lots of different steps in machine tool spindles. Keep a file card handy and clean your file regularly. As you said, there are two basic ways of grinding - (a) the knife is held level and the handle is pulled back to grind the belly and tip. So plunge grinding is limited to 40 mm wide. Learn more about us. A choil is an unsharpened indent on a blade where it meets the handle or at the plunge line. The actual degrees vary, but a typical angle of a Chisel Grind is about 25 degrees. Hollow grind with faded plunge line YouTube. Incorrect wheel dressing: Adjust dressing tool so that the circumference of the wheel touches the circumference of the work: Faulty grinding operation: Check steady rest position. To grind the convex grind will take some basic math to thin of in advance and calculate the angles (and thus the height setting of the bolt) to make. Soak it in vinegar to get your scale off. A form of OD grinding, however the major difference is that the grinding wheel makes continuous contact with a single point of the object instead of traversing the object. This feed down with out moving across. (b) the knife edge is held perpendicular to the belt. Different belts make different plunge lines. Ideally, plunge cuts should terminate between 2/3 of the blade's width from edge to spine, to terminating just short of the spine. I use this one on certain blades where the plunge is angled and a work rest wouldn't work anyway. From a viewer request here s a quick video on my plunge line grinding guide. May 27, 2014 #5 It looks like you are using to steep of a degree.That looks like about a 15 degree beval or so and for a full grind I would say 2 - 3 maybe 4 at the most. Forming the Plunge line on you knife. What you see here is the plunge line grinding attachment. Grinding Cones and Plugs - Cut-Off and Grinding Wheels . I later realized the comment should be a topic itself. I'm still a relative beginner compared to a lot of guys on the forum but I have a done a couple of blades where the plunge line is straight / vertical as per the knives on the right side of your attached picture, the best one being my Competition Bowie - these were achieved by doing a flat grind all the way up to the spine. It then tapers in a straight line toward the edge. To grind nicely radiused plunge lines there are two common methods: Using J Flex belts. Or even $150 to get the really… It’s often the mark of an experienced knife maker as a clean, curved plunge line is difficult to achieve evenly on both sides of the knife. Make a series of closely spaced cuts up to the scored line. Another way is to clamp a file guide on your blade where you want the plunge lines to be then grind down to the guide. I like the result so far. I like to do the divots separating the handle and bevel. The line was effective at grinding and wearing against the opposition s top scoring line by providing an enforcing presence helping the team win four Stanley Cups 2 After the 2004 05 NHL lockout in 2005 McCarty s contract was bought out by the team in an effort to make them compliant with the newly implemented salary cap We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. You then need to hang the belt off the platen approx 1/4" so that it can climb over the plunge line edge you just created while working your way back toward the guard keeping the grind angle the same. When your sewer line is clogged, the water can’t go down the drain. From a viewer request, here's a quick video on my plunge line grinding guide.Subscribe to Simple Little Life: https://www.youtube.com/channel/UCUSz...Watch More Simple Little Life: https://www.youtube.com/channel/UCUSz...Follow Simple Little Life:Facebook: https://www.facebook.com/simplelittle...Instagram: https://www.instagram.com/simplelittl...Follow Homestead Knives:Facebook: https://www.facebook.com/hsknives/Official Website: www.simplelittlelife.caKnife Store: www.homesteadknives.comWatch More Simple Little Life:Latest Uploads: https://www.youtube.com/watch?v=nwPJJ...Popular Videos: https://www.youtube.com/watch?v=nwPJJ...Knife Making: https://www.youtube.com/watch?v=8aXyw...DIY: https://www.youtube.com/watch?v=w_2ey...About Simple Little Life:This channel has sort of turned (inadvertently) into a knife making channel. But is there a so-called best blade grin… To learn more, please refer to the cookie policy. If the edge of your platten is sharp and square, it will impart that same shape to you plunge. Stay away from the plunge line with the sanding wheel and attempt to evenly grind away material down to the first center scribe railroad track line. Unfortunately this takes consistant talent to pull it off well which is why it has eluded me. Official Simple Little Life video of Tool Time TuesdayKnife makers plunge line grinding guide. The Ricasso is the unsharpened section of a blade, closest to the guard/handle. Draw that larger circle on the back of the tile (Photo 2). This ia a scrap blade so I can praktice a lot. Some previous posters have recommended various versions of "plunge" grinding. If it has a radius, the plunge will have the curved feathering into the spine. Brian923. The size of a choil dictates its purpose, if it’s large then it can be used as a forward finger grip. The major first thing to think about is uneven wheel wear. Unfortunately this takes consistant talent to pull it off well which is why it has eluded me.

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