Even a blind squirrel finds an acorn occasionally !!!
Making a continuous closed loop sanding belt.
Old style sanding block on top uses an open piece of paper.When front of paper wears you have to discard whole strip.
New design on bottom uses a continuous loop belt. When front wears the belt
tension can be backed off enabling the belt to be rotated to a fresh
The challenge was to be able to easily make the new
continuous loop sanding belt for the new design block. I'll provide a
brief overview on making a continuous belt. For more details go HERE
Supplies needed to make a continuous belt.
Small section of cloth backed shop roll. 3M micro finishing film. The micro finishing paper is mi-liar backed.
A good brand of super glue.
A small section of the 3m micro finishing film is super glued to the cloth backed shop roll
Add glue to the other end.
Squeeze the joint.
I have found this splice using the mi-liar paper on a cloth backed shop roll makes an extremely tough and strong joint. I use the same process for belts that are power driven.
Because the mi-liar accepts super glue so well I have had great success with different belt materials other than a cloth back paper.
The winder was fabricated using some scrap 80/20 parts in the scrap bin and a 5C spin fixture.Using a tail stock type support for the extra small mandrels will enable me to turn those extra small compression springs for the miniature Colt 1911.
The split Boxwood and brass thumb screw provides a safe and clean way to adjust tension on the piano wire as it is being rolled around the mandrel
Above picture shows a rectangle mandrel installed for forming the rectangle magazine spring.
The spring above was "Stressed Relieved" before removing spring from the Mandrel.
This prevents the spring from being distorted when removed.To see what a non stress releived rectangle spring looks like and more pictures of the spring winder go.HERE
The spring winder photos are at the end.