Official Luthiers Forum!

I have a General International 13" sander # 15-155M1 . The paper that comes with it is a sheet 3.25 wide x 81.5 long cut as a parallelogram, that side being (15.75" as measured on the 81.5" length
Because of the way it clamps to the drum, 5" diameter x 13.75 long, That angle is critical.
I can buy 3" paper easier than 3.25 but that changes the angle & overall length.
Can anyone tell me what those numbers are?
Mike McNerney

_________________
Mike McNerney

Hi Mike,
I presume this is a drum sander?
If you look at it that the area covered will be the same. then the other side of the new parallelogram can be worked out. The short side of the parallelogarm does not change (diameter of the drum)
Area of a parallelogram = height X width (same as a rectangle)
This means the change in length would be in the ratio of the change in widths.
I believe this works out to 3.25/3.00 X 81.5" = 88.2197"
Make sense?

_________________
The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.

Darn smart Colin....!You made it seem so obvious and easy....!Congrats.
Tom

_________________
A person who has never made a mistake has never made anything!!!