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"https://i.ytimg.com/vi/F-vcdvqg-zk/hq720.jpg", "preference": -3, "id": "38"}, {"url": "https://i.ytimg.com/vi_webp/F-vcdvqg-zk/hq720.webp", "preference": -2, "id": "39"}, {"url": "https://i.ytimg.com/vi/F-vcdvqg-zk/maxresdefault.jpg", "height": 1080, "width": 1920, "preference": -1, "id": "40", "resolution": "1920x1080"}, {"url": "https://i.ytimg.com/vi_webp/F-vcdvqg-zk/maxresdefault.webp", "preference": 0, "id": "41"}], "thumbnail": "https://i.ytimg.com/vi/F-vcdvqg-zk/maxresdefault.jpg", "description": "Machining A Pinion Head Depthing Tool, Part 3, by Clickspring.\n\nIn this final episode of the Pinion Head Depthing Tool build, I finish off the tool by making the runners and wheel bushings. \n\nThere's some interesting lathe turning in this video, with a demonstration of the operation of the depthing tool.\n\nI'm following WR Smiths design for the depthing tool. You can find plans and a description for it in his book \"Clockmaking and Modelmaking Tools and Techniques\" (link below).\n\nFor more info on this build, as well as other tool making info and plans, visit http://www.clickspringprojects.com\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:\nSherline Lathe: http://amzn.to/2pnXM19\nSherline WW collets: http://amzn.to/2FYZ7F8\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\nInterapid Dial Test Indicator: http://amzn.to/2FPInwH\nLoctite 231097 603 Retaining Compound, 10 mL: http://amzn.to/2pid6vR\nDigital Calipers: https://amzn.to/2IkFh4O\n\nAbbreviated Transcript:\n\n00:19 By making a range of runners and bushings for different combinations of wheels and pinions, the tool can be made quite versatile, and I've chosen 1/8\" as the base diameter for the runners, so some will need to be trimmed to a thinner diameter to fit various pinions, and some will need to be bushed to accommodate the larger bores of the wheels. One will end up as a cone runner to enable depthing from existing pivot holes.\n00:39 So I've cut 8 blanks from silver steel to cover a range of options. Each of these were then loaded onto the small lathe to clean up the saw cut, and give them a light chamfer. Most of the runners will need a point for scribing on one end, so I took care of that operation first, setting up for a 30 degree included angle cut. \n01:32 Then I used a fine cut file to make the very tip more like a 60 degree point, just to give it a bit more strength. I'm not going to harden any of the runners, but since they'll only ever be scratching brass, they should wear quite well with just this 2 stage point. Next I turned 2 of the shorter runners down to match the pinions on the clock that I'm working on right now;\n02:14 It's used for depthing from an existing hole. First up it was faced, and then turned to diameter. It was then drilled and reamed to accept that runner shaft that I set aside earlier. The reaming ensures that the runner shaft is a nice snug fit.\n02:55 It was then parted off, reversed and set to run true in a 4 jaw chuck, A 60 degree point was then formed on the end. A touch of loctite bonds the cone tip to the runner. And that gives me the cone runner, 2 long runners for wheel bushings, 2 cut down to fit pinions, and a few spares for the future.\n04:24 I'm parting these runners off a little differently to normal. I made the parting cut almost all the way through, then backed out the tool, and took another fine cut to leave a reasonable finish to the cut-off side.\n04:33 So that gives me a set of 4 that'll certainly cover me for the time being. And that's all parts complete, so time to put it all together and give it a run.\n05:46 Depthing a gear train is the process of finding by trial and error the correct distance apart that two gears will perfectly mesh. Once we have that distance, the tool is used to transfer it directly to the plates so that we know where to drill our pivot holes.\n06:01 The adjustment screw is then brought to bear on the closest carrier, and used to slowly nudge the pinion closer to the wheel. And this is the process of depthing.\n06:28 With every shift closer, the parts are checked both visually, and by feel, until the perfect meshing of wheel and pinion is achieved.\n06:49 They're now pulled up within their carriers, that the tool will sit horizontally when its held onto the clock plate. And just like the classic depthing tool, this distance is then scribed onto the clock plate, to give the drilling location for the pivot hole.\n\nReferences:\n\nWR Smith workshop and clock construction books\n(Depthing Tool Design):\nhttp://www.wrsmithtelegraphkeys.com/\n\nJohn Wilding workshop and clock construction books: \nhttp://www.ritetimepublishing.com/\n\nHome Machine Shop Tool Making - Machining A Pinion Head Depthing Tool - Part 3", "channel_id": "UCworsKCR-Sx6R6-BnIjS2MA", "channel_url": "https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA", "duration": 502, "view_count": 245414, "age_limit": 0, "webpage_url": "https://www.youtube.com/watch?v=F-vcdvqg-zk", "categories": ["Science & Technology"], "tags": ["machining", "mini lathe project", "pinion head depthing tool", "depthing tool", "Sherline", "lathe project", "machinist project", "clockmaking", "how to make a clock", "machine shop", "Home Machining", "machine shop projects", "clock maker", "home shop project", "WR 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One will end up as a cone runner to enable depthing from existing pivot holes.", "end_time": 39.0}, {"start_time": 39.0, "title": "So I've cut 8 blanks from silver steel to cover a range of options. Each of these were then loaded onto the small lathe to clean up the saw cut, and give them a light chamfer. Most of the runners will need a point for scribing on one end, so I took care of that operation first, setting up for a 30 degree included angle cut.", "end_time": 92.0}, {"start_time": 92.0, "title": "Then I used a fine cut file to make the very tip more like a 60 degree point, just to give it a bit more strength. I'm not going to harden any of the runners, but since they'll only ever be scratching brass, they should wear quite well with just this 2 stage point. Next I turned 2 of the shorter runners down to match the pinions on the clock that I'm working on right now", "end_time": 134.0}, {"start_time": 134.0, "title": "It's used for depthing from an existing hole. First up it was faced, and then turned to diameter. It was then drilled and reamed to accept that runner shaft that I set aside earlier. The reaming ensures that the runner shaft is a nice snug fit.", "end_time": 175.0}, {"start_time": 175.0, "title": "It was then parted off, reversed and set to run true in a 4 jaw chuck, A 60 degree point was then formed on the end. A touch of loctite bonds the cone tip to the runner. And that gives me the cone runner, 2 long runners for wheel bushings, 2 cut down to fit pinions, and a few spares for the future.", "end_time": 264.0}, {"start_time": 264.0, "title": "I'm parting these runners off a little differently to normal. I made the parting cut almost all the way through, then backed out the tool, and took another fine cut to leave a reasonable finish to the cut-off side.", "end_time": 273.0}, {"start_time": 273.0, "title": "So that gives me a set of 4 that'll certainly cover me for the time being. 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