How To Make A Clock In The Home Machine Shop - Part 12 - Making The Collets And Other Arbors (Patreon)

How To Make A Clock In The Home Machine Shop - Part 12 - Making The Collets And Other Arbors

How To Make A Clock In The Home Machine Shop, Part 12, by Clickspring. In this video I make a start on the going train wheel assemblies, by making the wheel collets and arbors, as well as forming the arbor pivots. A wide range of small operations were used to complete this part of the clock build: Marking out, drilling, tapping, and lathe work, as well as the creation of another set of custom screws. Thanks for watching. If you enjoyed the video please give a thumbs up, and leave me a comment. If you would like to help support the creation of these videos, then head on over to the Clickspring Patreon page: https://www.patreon.com/clickspring You can also help me make these videos by purchasing via the following Amazon Affiliate links: Cameras used in this video: Panasonic GH5 - https://amzn.to/2rEzhh2 Panasonic X920 - https://amzn.to/2wzxxdT Tools & Shop Products: Dykem 80300 Steel Blue Layout Fluid, Brush-in-Cap (4oz): http://amzn.to/2HGPaJJ "Solidworks 2013 Bible": http://amzn.to/2FObS1D "Machinery's handbook": http://amzn.to/2pi7XE5 Dormer A190202 Jobber Drill Set, 1.0 mm - 6.0 mm x 0.1 mm Size: https://amzn.to/2DR5fdb Dormer A190203 Jobber Drill Set, 6.0 mm - 10.0 mm x 0.1 mm Size: https://amzn.to/2ITfeTa YG1 NC Spotting Drill 8% Cobalt HSS 1/8 to 1/2" 120 Degree 5 Pc Set CNC Machine: https://amzn.to/2G7ylv6 Sherline Lathe: http://amzn.to/2pnXM19 Sherline WW collets: http://amzn.to/2FYZ7F8 Saint Gobain (Norton) - 4 Arkansas Stones + case: http://amzn.to/2HCOAMX Loctite 231097 603 Retaining Compound, 10 mL: http://amzn.to/2pid6vR For more info on this build, as well as other tool making info and plans, visit http://www.clickspringprojects.com Other Videos to Watch: How To Make A Clock In The Home Machine Shop - Part 8 - Making The Barrel Arbor https://www.youtube.com/watch?v=b5KwOi-JkEU Home Machine Shop Tool Making - Making a Finger Plate Clamping Tool https://www.youtube.com/watch?v=FgBM-JVRWgU Ask Me A Question: http://www.clickspringprojects.com/contact.html Abbreviated Transcript: 0:00:49 Now the center wheel collet is a little different from the other's in that it has a pivot built into its profile. And to make that pivot last longer when the clock is in service, I'll be making this collet from drill rod. The other two collets are just simple wheel mountings, so they'll be made from brass. 0:01:01 For materials, I'm making the collets from this rod stock, and the arbors will be made from pivot steel. Pivot steel is a high carbon steel that has been hardened and then tempered to blue. Its tough, but can still be machined, and its reasonably straight as supplied from the manufacturer. 0:01:56 So the first step was to get the collets into basic shape, and they were each formed in essentially the same way. The central bore needs to be a good fit on the arbor, so after drilling out most of the metal, I used a reamer made from the actual arbor stock the collet will be mounted on, 0:03:20 Next I made a start on the arbor pivots, and there are 3 key features to be formed: The pivot itself, the domed end, and the chamfered shoulder. Now pivots need to be concentric with the outside diameter of the stock, which makes them an ideal candidate for turning on a small lathe equipped with 8mm collets. 0:04:34 A graver cuts the hardened steel surprisingly well, and pivot can be turned in a matter of minutes. After cutting the profile, I stoned the pivot surface with a fine oilstone, and then finished it off with a burnisher. 0:04:58 The burnishing work hardens the surface, and gives it a longer service life. The final feature to put in is the chamfer on the edge, which will reduce the shoulder friction with the plate when it's in operation. 0:07:23 So that's the collets complete, next I need the mounting holes for the wheels. drilling template. First the hole locations were marked out on this wheel crossing jig. 0:09:15 The wheel was then fastened into place using a commercial screw, and the other tapping holes were drilled, using the wheel holes as a drilling template. The remaining 2 holes were tapped, and all surfaces deburred with a light touch from a twist drill. Now the process was essentially the same for all three wheels, although there were some minor differences between them. 0:10:07 I took quite a bit of care as I was making the drill extender, to keep the runout of the drill to a minimum, so it still holds position very well, and the feel from the tap extender is just excellent for controlling a small tap. A set of 10BA screws were turned to size, and then hardened, polished and blued. References: John Wilding "Large Wheel Skeleton Clock" construction book can be purchased online from Ian T Cobb: http://www.clockmaking-brass.co.uk/clock_construction_books.html WR (Bill) Smith - Graver DVD: "Graver Making And hand Turning For Clockmakers" http://www.wrsmithclocks.com/videos.htm How To Make A Clock In The Home Machine Shop, Part 12, by Clickspring.