Tag Archives: square tubing

Materials List for Making Machine

There are requests for more detailed information coming in about the block press.  Our original materials list works.  However, we also appreciate the cost and difficulty in finding exactly what we recommended under some conditions.  We have experimented with some lighter grades of materials and can suggest new minimums.

2″ square tubing                            4 each 52″ long  11 gauge is best but we have had success with 16 gauge but we recommend 14 gauge minimum

4 each 12″ long  recommendations the same as above.

2″ angle iron                                    2 each 49 1/2 ” long  1/4 inch wall is best,  3/16″ will work and is our recommended minimum

5 each 9″ long  recommendations same as above  These are for braces

1/4 X 8″ plate                                 2 each 49 1/2 ” long  we have used 3/16″ instead of 1/4″ successfully   3/16″ is our recommended minimum

1/2″ X 8″ X 7 1/2″  plate             2 each  our minimum recommendation on this is 3/8″  The piece isn’t square.  The top measurement is 8″ and the bottom is 7 1/2″

1/2″ X 12″ plate                             1 each 32″ long and 1 each 14″ long  These are the lids for the chamber.  We have used 3/8″ successfully and that is our recommended minimum

1″ acme threaded rod                 1 each 36″ long  We used 4 tpi (threads per inch) originally  We have since began using 5 tpi.  4 tpi means less turns per cyle but 5 tpi means easier turning and more power.  We recommend 5 tpi

1″ acme thread nut                      1 each

Good News and Bad News

The bad news is the original press has some issues.  One of the problems is the sides are vertical and that makes getting the block out of the press difficult.  Another is it is difficult to remove the trash from the press between blocks.  And then there’s the wire guides, difficult to use when operating the press, too far apart,  and generally awkward to use.

The good news is

I spent some money for some more materials.  I decided to use three wires for the new version of the blocks.  The size is the same.  But the new press has the outside wires closer inside and then I put in a middle wire to contain the middle bulge we get.

I’m trying to get the machine down in cost material wise.  I also want the materials to be as common as possible so that the presses can be made on site if necessary just about anywhere in the world.  I’m trying 11 gauge 2″ X 2″ square tubing for the floor and base end.  I hope this will be substantial enough to hold up over time.

If you look close you and see I”m using quarter inch spacers between the tubes for wire guides.  I believe this will simplify the compression phase because the tie wires will be lying out of the way.  The tie wires will still have to be attached to the ram.  But we won’t have to fight keeping them in the guides like we did with the original press design.

I’ve decided to put an eighth of an inch taper in each side to make removing the completed block easier.  The top has an 8 ” inside measurement.  And the bottom measures 7 3/4″ inside.

We’ll be making blocks with the new design tomorrow if everything goes right.