Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Bench top attachment

  1. #1
    Join Date
    Jan 2011
    Location
    Spitting distance north of Detroit Michigan
    Posts
    3,798

    Bench top attachment

    So...how did you mount yours? I'm trying not to use any materials other than wood & glue on my bench {excluding the vise hardware} and could use some experienced thoughts/comments... {the top is 3 layers of 3/4" mdf, banded in maple, if that matters}...

    I was/am leaning towards locating dowels and weight alone, but, believe it or not, I've made a bad decision or two in my time ................Thanks in advance
    The perception of perfection is perfectly clear to everyone else

  2. #2
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    Despite the lamination (my bench top is 4 layers) MDF is not self supporting. Just as in all those sagging router table threads we've read, your top will need to be well supported. This assumes several contact points between the base and the top (rough diagram for example only, I'm still having my first cup of coffee). I understand the desire to avoid metal fasteners but, I just ran a half-dozen 1/4" lag bolts up through oversized holes from under the supporting ribs. You could use dowels and receiver holes in the same positions to avoid the metal fasteners.

    Click image for larger version. 

Name:	bench pegs.jpg 
Views:	18 
Size:	34.4 KB 
ID:	87946
    Last edited by glenn bradley; 12-19-2014 at 01:22 PM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  3. #3
    Join Date
    Jan 2011
    Location
    Spitting distance north of Detroit Michigan
    Posts
    3,798
    Thanks Glenn, I should of added more info to the mix...Here's a shot of the bench, the cross supports are approximately on 9 1/2 inch centers with about 12" on the outside ends. Think this is still going to be a sagging candidate?
    Click image for larger version. 

Name:	1.jpeg 
Views:	43 
Size:	62.8 KB 
ID:	87947
    The perception of perfection is perfectly clear to everyone else

  4. #4
    Join Date
    Dec 2006
    Location
    Yorktown, Virginia
    Posts
    5,016
    Dowels or blocks glued to the underside that keep it locked within the frame would work. I used glue blocks and it's still strong. A problem might arise if you had a vise mounted to the frame pushing on something using a dog hole on the top, but even then dowels or glue blocks should keep it in place.
    Last edited by Ted Calver; 12-19-2014 at 03:49 PM.

  5. #5
    Join Date
    Jan 2011
    Location
    Spitting distance north of Detroit Michigan
    Posts
    3,798
    Thanks Ted, more food for thought
    The perception of perfection is perfectly clear to everyone else

  6. #6
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    Quote Originally Posted by Ken Cook View Post
    Thanks Glenn, I should of added more info to the mix...Here's a shot of the bench, the cross supports are approximately on 9 1/2 inch centers with about 12" on the outside ends. Think this is still going to be a sagging candidate?
    Click image for larger version. 

Name:	1.jpeg 
Views:	43 
Size:	62.8 KB 
ID:	87947
    I am such a dork! You had shown that base in your 'flattening' thread . . . Doh! I would think that support area should be just fine. I use the same 5 front to back ribs on my 55" wide, 24" deep base for a 30" x 84", 4 layer top. It has been fine for years with a fairly heavy vise at each end (one face, one tail). the dowel idea should work there but, I really like Ted's idea of some blocks attached to the bottom of the top in the inside corners. Same basic effect either way you choose.

    Click image for larger version. 

Name:	vises 002.jpg 
Views:	14 
Size:	118.4 KB 
ID:	87954
    Last edited by glenn bradley; 12-19-2014 at 10:20 PM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  7. #7
    Join Date
    Oct 2009
    Location
    Dennison, MN
    Posts
    512
    Most of mine are pocket screwed from the underside.
    "Do, or do not. There is no try."
    -Yoda



  8. #8
    Join Date
    Jun 2007
    Location
    Oceanside, So. Calif. 5 mi. to the ocean
    Posts
    4,944
    My bench top sits on 3/4" dowels. The top is three layers of 3/4" plywood plus 1/8" temper board replaceable top surface. It has been quite a few years and I have not replaced the temper board as yet.

    Glenn and I (guess who did the heavy lifting) flipped the top over a few weeks ago to install a new vise without having to work over our heads. I think we found that I had put in three wood screws (Don't get old your brains leak out). Regardless the top came off easily to be laid back down up-side-down for vise mounting.

    Glenn, you have a younger brain than I have. Did those screws have anything to do with holding the top down?

    The bench top is 27" by almost 6 feet. (There is a story behind that "almost" but I'm not telling it.)

    Ken, How about one sheet of 3/4" plywood under two sheets of MDF. That should take care of any, even microscopic, tendencies for the MDF to sag. It would also give dog holes a bit more bracing.

    Enjoy and have fun with your bench. A good bench is a truly wonderful thing to have.
    JimB
    First of all you have to be smarter than the machine.
    VOTING MEMBER

  9. #9
    Join Date
    Jan 2011
    Location
    Spitting distance north of Detroit Michigan
    Posts
    3,798
    Thanks Jim, I was going to go with 4 layers of MDF like glenns, but I hadn't taken the bench frame height into the equation, and even though it only added 3/4 of an inch, it seemed odd placing my hands down on it during testing. The ply under it sounds good though, that ingenious son of yours mentioned adding a strip underneath the top, inline with each row of dog holes for extra strength. So we have a plan now on that aspect and I'm going with the corner blocks as well. All is good now thanks to you wonderful folks...as usual
    The perception of perfection is perfectly clear to everyone else

  10. #10
    Join Date
    Apr 2008
    Location
    Independence MO
    Posts
    561
    I've been working more and will be for a while. But I wanted to mention something from the old RAS days. If you search for a Mr. Sawdust table, you will find he layered the top (two 3/4" boards), but between them, he glued some steel strips, thin edge up, for support (keep from sagging).

    This would take planning for dog hole purposes, but might help.

Similar Threads

  1. Attachment
    By Jim C Bradley in forum Site Questions and Test Posts
    Replies: 15
    Last Post: 01-04-2014, 07:30 PM
  2. New Orleans Saints Bench { Final Bench }
    By Marshall Border in forum Flatwork Project Showcase
    Replies: 8
    Last Post: 03-30-2012, 02:23 PM
  3. Repurposed bench materials - dedicated sharpening bench
    By Darren Wright in forum Carpentry and Construction
    Replies: 5
    Last Post: 12-31-2010, 05:25 PM
  4. Table Leg Attachment
    By Brent Dowell in forum Designs, Plans and Sketches
    Replies: 2
    Last Post: 06-26-2010, 03:03 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •