Making a 4-Jaw Chuck Backplate for the Proxxon PD 250/e Lathe #toolfest2021

Making a backplate which fits a 4-jaw independent lathe chuck to the Proxxon PD 250/e using 42CrMo4 engineering steel. A 4-jaw independent chuck is a vital piece of lathe equipment, but finding the right chuck for this lathe took me a while. I finally found one light enough to be useable while still being extremely capable. To ensure the best possible performance the back plate needs to be very rigid, but on a small lathe like this it can't be too heavy. Working on a part this big, made of tough material was a huge challenge on a Very Small Lathe. Check out the problems I faced, and how I overcame them in this video. This video is part of Tool Fest 2021! Look for other videos with the #toolfest2021 hashtag, and post on other social media, all coming out today! Many thanks to Emma's Spareroom Machineshop for making this happen, and thanks to Chirpy's Tinkering for the teaser video. OnShape Model: https://cad.onshape.com/documents/bc2... Emmas Spareroom Machineshop    / emmaritson   Chirpy's Tinkerings:    / chirpystinkerings   00:00 Introduction 01:09 Cutting the Material 04:28 Facing the Disc 15:04 Boring the Through Hole 18:02 Boring the Spindle Pocket 23:39 The Spindle Hole Pattern 30:14 The Chuck Register 37:01 The Chuck Hole Pattern 47:13 Testing the Chuck 49:03 Next Video Preview Materials: 80mm hot rolled 42CrMo4 engineering steel Tools: Proxxon PD250/e Lathe Proxxon FF230 Milling Machine Edited with: Davinci Resolve 17.4.2 audacity 3.0.2 Music: Easy Lemon by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...) Source: https://incompetech.com/music/royalty... Artist: http://incompetech.com/