This is my first blog and I hope it will go over well. This sander was inspired by models on the Internet but mostly by Blake: http://lumberjocks.com/projects/7641 and by Bob: http://lumberjocks.com/Bob3418/blog. I would like to thank them both for their posts. Without them this project would have been very difficult to complete.
Concept: My intentions are to make a 20” +/- wide drum sander that will easily switch from thickness to surface sanding. I would like to be able to reduce stock up to 18” wide and 3”-plus thickness. The extra width will also allow up to three grits of sandpaper on the roller at the same time. This will make sanding of smaller stock without having to change the paper each time. The surface sanding feature will have almost unlimited width by making several passes and a fence to sand edges. The combo drum sander design was conceived in ScketchUp 8 (first time using this wonderful software).
The drawing will be mainly used as a reference. Things will change as I go along. There are too many unknowns at this time. I plan to provide step by step information as much as possible. The materials I will use are not always going to be the best choice but rather materials I have on hand. Return trip to the closest Home Depot or a major supplier is over an hour’s drive from my home. So I tend to make things with what I have when I’m missing stuff.
The Drum: The drum was made with 26 pieces of 4” x 4” x ¾” MDF discs. The shaft is 5/8” medium hard shaft material bought at our local country machine shop. It was a deal breaker at $5.00.
The MDF was cut on the tablesaw.
Drilled on the drillpress.
Rounded on the bandsaw using a jig I made fast for this project.
The jig was was also used on the sander.
Note: There was no need to sand at this point but I wanted to try the jig on the sander.
The shaft was rough-up with a file before glue-ups.
I used Gorilla Glue to glue the discs to the shaft (dampening the inside hole prior to gluing)
and Titebond III to glue the discs to each other.
I glued one disc the night before to have a good square base to start the next day.
When adding discs to the shaft I noticed the glue starting to dry on the first discs as I got to 13 discs. I decided to clamp at this point to make sure to get a strong glue-up. The remaining discs were glued about two hours later.
This is it for Part 1. I would appreciate any comments to make sure I’m on the right track. Is it to detailed, too many pics, not enough information, etc.. Thanks for looking.
-- Paul, Plantagenet, Ontario