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Making them is quite an involved process, and one of the steps involves making a form tool to prepare the work surface for the impending knurl.\n\nThis is the first video in a series of at least 3, that will relate to the subject of these beautiful ornamental knurl patterns\n\nThe main project video that this video is related to is \"Machining A Set Of 'Vintage Style' Rope Knurls \": https://www.youtube.com/watch?v=i9pD5vIHJ8M\n\nFree plans for the double angled cutter, and form tool:\n\nhttp://www.clickspringprojects.com/uploads/3/8/2/2/38221101/double_angled_cutter.pdf\nhttp://www.clickspringprojects.com/uploads/3/8/2/2/38221101/form_tool_profile.pdf\n\nJoin YouTube Channel Memberships here: https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA/join\nBecome a Clickspring Patron here: https://www.patreon.com/clickspring/membership\n\nYou can also help me make these videos by purchasing via the following Amazon Affiliate links:\n\nCameras used in this video: \nPanasonic GH5 - https://amzn.to/2rEzhh2 \nPanasonic X920 - https://amzn.to/2wzxxdT\n\nTools & Shop Products:\n\"Solidworks 2013 Bible\": http://amzn.to/2FObS1D\n\"Lathework: A Complete Course (Workshop Practice Series)\" - https://amzn.to/2yBv4Rb\n\"Milling: A Complete Course (Workshop Practice Series)\" - https://amzn.to/2K2QZ97\n\"Hardening, Tempering and Heat Treatment (Workshop Practice Series)\" - https://amzn.to/2KbZo6l\nDykem 80300 Steel Blue Layout Fluid, Brush-in-Cap (4oz): http://amzn.to/2HGPaJJ\nDormer A190202 Jobber Drill Set, 1.0 mm - 6.0 mm x 0.1 mm Size: https://amzn.to/2DR5fdb\nDormer A190203 Jobber Drill Set, 6.0 mm - 10.0 mm x 0.1 mm Size: https://amzn.to/2ITfeTa\nYG1 NC Spotting Drill 8% Cobalt HSS 1/8 to 1/2\" 120 Degree 5 Pc Set CNC Machine: https://amzn.to/2G7ylv6\nKaowool 24\" X 12\" X 1\" 2400 F Ceramic Fiber Insulation: http://amzn.to/2pfsM3d\nSaint Gobain (Norton) - 4 Arkansas Stones + case: http://amzn.to/2HCOAMX\n\nAbbreviated Transcript:\n\n00:05 I'm about to make some brass thumbwheels, with a vintage style rope knurl. But before I can form the knurl pattern, I need to shape the brass perimeter, so that the knurling tool will work correctly, and I'm going to do it using a form tool like this.\n00:20 The profile of the cutter is reasonably straight forward, but the relief angles require a bit of planning. I've chosen 10 degrees as the relief angle, and I should be able to take care of these front faces on the mill.\n00:29 Ideally I'd cut the central section with a tapered end mill, but I don't have one. So instead I'll drill it out and then finish it off by hand using a file. So starting with some 1/4\" O1 tool steel, I cut off a section, and then squared it up on the mill.\n01:49 Ok so next I need to mill the work down to this reference line, as well as across to this corner, while at the same time generating the relief angles. I can take care of the main relief angle in a similar way as before, by using the angle block to tilt the work in the vise.\n02:05 And the second angle can be generated by using the swivel base of the vise. \n02:33 This section here needs to be profiled into a curve, while at the same time generating the 10 degree relief. I think the easiest way to tackle this is to use the belt sander, so I've tilted the table to 10 degrees, to match the other face angles, and then using a 400 grit belt, I formed the curve.\n03:05 The curved section terminates at the point I marked out with the dro, and I've sanded as far into the corner as I dared, without risking the profile.\n03:58 The last step is to quench harden the steel, and temper the cutting edge to a light straw. A quick polish on this oilstone, and its ready to be put to work.\n04:28 A form tool like is a great way to get a repeatable profile onto a short run of parts. There's a few drawbacks in using them though, that are worth mentioning.\n04:37 Firstly, there's a lot of cutter surface in contact with the work, particularly when it gets to the full depth, so it really is quite hard work for a small lathe like this. This cutter is about 15mm wide, and I'd say that its at the upper limit of what my lathe can cope with before it simply stalls.\n04:50 Secondly chatter on a tool like this is pretty much unavoidable. But I've found that using a low rpm and keeping everything as rigid as possible makes it quite manageable.\n\nReferences:\n\nFrank Ford (Luthier/Machinist)\nhttp://www.frets.com/HomeShopTech/Projects/RopeKnurl/ropeknurl.html\n\nMachining, Hardening And Tempering A Form Tool For The Lathe, by Clickspring", "channel_id": "UCworsKCR-Sx6R6-BnIjS2MA", "channel_url": "https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA", "duration": 353, "view_count": 429500, "age_limit": 0, "webpage_url": "https://www.youtube.com/watch?v=nZsnGhwsjjo", "categories": ["Howto & Style"], "tags": ["lathe", "lathe project", "form tool", "brass", "rope knurl", "knurling", "knurl", "making", "maker project", "clockmaking", "machine shop", "model engineering", "Home Machining", "machine shop projects", "Machining", "Metal", "hand tools", "clock maker", "home shop project", "Tool (Literature Subject)", "Hardening", "Tempering", "Metal Lathe"], "playable_in_embed": true, "live_status": "not_live", "media_type": 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But before I can form the knurl pattern, I need to shape the brass perimeter, so that the knurling tool will work correctly, and I'm going to do it using a form tool like this.", "end_time": 20.0}, {"start_time": 20.0, "title": "The profile of the cutter is reasonably straight forward, but the relief angles require a bit of planning. I've chosen 10 degrees as the relief angle, and I should be able to take care of these front faces on the mill.", "end_time": 29.0}, {"start_time": 29.0, "title": "Ideally I'd cut the central section with a tapered end mill, but I don't have one. So instead I'll drill it out and then finish it off by hand using a file. So starting with some 1/4\" O1 tool steel, I cut off a section, and then squared it up on the mill.", "end_time": 109.0}, {"start_time": 109.0, "title": "Ok so next I need to mill the work down to this reference line, as well as across to this corner, while at the same time generating the relief angles. I can take care of the main relief angle in a similar way as before, by using the angle block to tilt the work in the vise.", "end_time": 125.0}, {"start_time": 125.0, "title": "And the second angle can be generated by using the swivel base of the vise.", "end_time": 153.0}, {"start_time": 153.0, "title": "This section here needs to be profiled into a curve, while at the same time generating the 10 degree relief. I think the easiest way to tackle this is to use the belt sander, so I've tilted the table to 10 degrees, to match the other face angles, and then using a 400 grit belt, I formed the curve.", "end_time": 185.0}, {"start_time": 185.0, "title": "The curved section terminates at the point I marked out with the dro, and I've sanded as far into the corner as I dared, without risking the profile.", "end_time": 238.0}, {"start_time": 238.0, "title": "The last step is to quench harden the steel, and temper the cutting edge to a light straw. 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