‰  NOW 30 WPM  ‰   TEXT IS FROM JUNE 2014  QST  PAGE 58‰

ABOUT 1/16 INCH LONGER THAN THE SLEEVE.  THE FRAME SPACER IS CUT TO THE
SAME LENGTH AS THE SHAFT.  SAND ALL ENDS SQUARE AFTER CUTTING.  THE PULLEY
IS COMPRISED OF THE TWO CDS CEMENTED TO EITHER SIDE OF THE 4 INCH PLASTIC
DISC.  I USED A GEL TYPE POLYURETHANE ADHESIVE.  BEFORE GLUING, I ROUGHED
UP ALL CONTACT SURFACES WITH FINE SANDPAPER.  TAKE CARE TO CENTER THE INNER
DISC ON THE CD AND THEN ALIGN THE SECOND CD WITH THE FIRST IN A SANDWICH.
AFTER GLUING, CLAMP THE ASSEMBLY BETWEEN BLOCKS.  SPRING CLAMPS ARE
PREFERABLE TO C CLAMPS, WHICH MIGHT APPLY TOO MUCH PRESSURE.  THE DONUT
HOLE WILL NEED TO BE ENLARGED TO ACCOMMODATE THE BEARING.  I HAVE FOUND
THAT THE SCRAPING ACTION OF AN ORDINARY WOODWORKING SPADE BIT IS IDEAL FOR
DRILLING LARGE DIAMETER HOLES IN PLASTIC.  AFTER DRILLING, PRESS THE
BEARING SLEEVE INTO THE HOLE AND SECURE IT WITH SEVERAL DROPS OF AN INSTANT
BOND GLUE.  FINAL ASSEMBLY OF THE PULLEY CONSISTS OF FIRST INSERTING THE
BEARING SHAFT INTO THE BEARING SLEEVE AND LUBRICATING IT WITH A GENEROUS
DAB OF LITHIUM GREASE.  THEN ATTACH THE TWO FRAME PIECES TO THE PULLEY WITH
8 32 STAINLESS STEEL SCREWS PASSED THROUGH THE BEARING SHAFT AND FRAME
‰  END OF 30 WPM TEXT  ‰  QST DE W1AW  ƒ