Homemade 12" Disc Sander (Part 1)

if you watched some of my previous videos you will probably have seen my disc sander which is basically a drill and a melamine disc mounted into its Chuck and the drill I used here is really not good the Chuck has a lot of play and - a compensator for that I put on a little bearing at the end here so the disc won't deflect when I push against and sand here but what's special about these discs are the mounting flanges I have four discs in total and every one of them has this flange and it's made from some solid shafting material a friend of mine turned down for me they run perfectly - and they allowed me to mount them in a drill so here's the flange and it really runs totally true and it also has this little tip in the middle that helps me to find the right center of the disc but just recently I recognized that this shaft has exactly 12 millimeters and that's a common size for bearings so if I could just put them bearing right here and right here and the pulley in the middle I could build a disc sander that's powered with an induction motor and I could also use a bigger disc than I used here and with two bearings this should run better than with this cheap throw so here's what I came up with I have a 30 centimeter or 12 inch disc mounted onto one of my flanges here are the two bearings in the housings made out of wood and pulley in the middle and here is the little motor bit under one horsepower and it works great so far the belt I used here was just for testing and it's way too long so I got myself a shoulder belt and next I'm going to put this in here and the motor will sit on top of here here you can also see a little bit more of what I put together there it's mainly made from scrap material and because I didn't know how well it would turn out I didn't took video of it but then I saw some potential in it and I thought it's worth making a video of it my first attempt on mounting the motor worked but it wasn't sturdy enough and I got too much vibration so I came up with another solution so now it's a smaller belt I can mount the motor on this frame right on top the motor shaft was very short so I had to cut a rabbet into the frame to move it closer to the pulley the frame was then just screwed in place then I marked where to put the holes for the motor mount broke them and fastened the motor with the carriage bolt washer and the nut on both sides now the motor was mounted really rigid but I was still getting too much vibration the disk itself was not a hundred percent round so I set up to turn around and they had to be very careful to not get a catch to test if it's a hundred percent ground I played the turn into a flat onto the disk and if it doesn't jump it is round but there was still too much vibration you can see the machine moving off the workbench so we had to take it apart to balance the disk to find out the heavy spots of the disk I gonna use this very easily running ball bearing you can clearly see that there is a heavy spot in disks so I marked whether this and remove some material from them so now with these two balance holds and it's pretty much perfectly balanced no more heavy spots so let's put it back together it was still not perfect but close enough for me to go on I bought some self-adhesive sanding discs with 60 grit and that's what I used in the past and it worked good for me this machine is not a finishing sander it's more a shaping sander and I also wouldn't recommend to go any higher than 80 grit because then the discs would wear out really fast and you have to change them frequently and it's really not fun with self-adhesive discs and if you watch close you can see that the disc I put on is not perfectly round then I started working on the table it's just simple frame with two boards I didn't want to go through the trouble and make a proper tilting table because I never needed one yet so I could use this tender now as it is but the disc has a little bit of deflection and I knew that I would run into this problem because the shaft of my flanges aren't really long enough so what I want to do to fix this problem is to mount this roller blade wheel behind the disc and this should prevent the disc from deflecting with this wheel the machine got a little bit louder but that's not a problem because I always put your protection then I made sure that a table is Square to the disc it was really close and shimming with just two layers of paper brought that on square you can see that a light gap is even from top to bottom and then it was time to do the first sanding test the 60 grit paper makes a lot of dust pretty quick so I definitely need to hook up this collection therefore I used a Forstner bit to cut a hole into one of the side boards my method to get tail freeholds is to drill until just the tip of the drill reaches the other side then turn the piece around and finish the hole from that side and to finally fix the vibration issues I put on some rubber feet and with this the machine stayed in place so now the sander is basically working and in the next video I will finish it up you

Channel: Marius Hornberger

Views: 257,482

Rating: 4.9094944 out of 5

Keywords: wood, woodworking, holz, Holz, Holzwerken, holzwerken, Werkstatt, woodshop, shop, workshop, tools, tablesaw, table, saw, bandsaw, scrollsaw, lathe, drillpress, dust, collection, collector, Tischkreissäge, Bandsäge, Dekopiersäge, Ständerbohrmaschine, Bohrmaschine, drill, mini, project, projects, Projekt, Projekte, video, new, disc, sander, homemade, selbstgebaut, 60 grit, 12, inch, 30, cm, 1400, rpm, Schleifer, Tellerschleifer, Schleifpapier, sandpaper, building, part, part 1, part 2, 60, grit

Id: TArwSUQ-bp8

Length: 7min 47sec (467 seconds)

Published: Sat Jan 17 2015