=  NOW 30 WPM  =  TEXT IS FROM DECEMBER 2020 QST  PAGE 46 =

THIS.  YOST TOOLS V 275 PORTABLE VACUUM BASE VISE WITH A LEVER CONTROL TO
SEAL THE VACUUM BASE TO A SMOOTH SURFACE, THIS SOLID 3 1/4 POUND UNIT,
SHOWN IN FIGURE 8, CAN HANDLE GOOD SIZED PROJECTS.  THE JAWS RIDE ON TWO
SMOOTH CYLINDERS WITH A CENTER SCREW THAT ALLOWS THE JAWS TO OPEN TO A
MAXIMUM OF 2 1/2 INCHES.  THE CAST METAL PARTS ARE FINISHED IN A
GREY/SILVER COAT.  THE JAWS HAVE A V SHAPED GROOVE RUNNING THEIR LENGTH AND
THREE VERTICAL GROOVES TO HOLD CYLINDRICAL PARTS.  SOFT COVERS PREVENT
SCRATCHING OBJECTS HELD IN THE JAWS.  WITHOUT THE COVERS, THE JAWS ARE 2
1/2 INCHES WIDE AND 1/2 INCH HIGH.  A FRICTION BALL COUPLES THE JAW
ASSEMBLY TO THE BASE.  WHEN LOOSENED, THE JAWS CAN ROTATE 360 DEGREES, TILT
APPROXIMATELY 45 DEGREES TO EACH SIDE, AND 90 DEGREES TO THE FRONT AWAY
FROM THE FRICTION LEVER.  WHEN THE JAWS ARE OPEN FULLY, AN INTERNAL
MECHANISM KEEPS THE JAWS FROM RIDING OFF THEIR MOUNT.  EXPERIENCE WITH
OTHER DEVICES SHOWS THAT, OVER TIME, YOU MAY EXPERIENCE PROBLEMS WITH THE
VACUUM SEAL THAT HOLDS THE VISE IN PLACE.  THIS 3 1/4 POUND UNIT IS MOUNTED
ON A LARGE ENOUGH BASE THAT VACUUM HOLD MAY NOT BE NEEDED FOR MANY TASKS.
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