BANDSAW OPERATIONS - OD1646 - LESSON 1/TASK 1
Number 120 (or number 150) grain (fine) should be used for fine polishing
operations.
The bands are preformed in continuous bands in appropriate
sizes to fit the bandsaw machine.
FIGURE 34.
BAND POLISHING GUIDE.
(b) Selection of Polishing Bands.
Polishing bands should be selected
according to the particular job to be performed.
For general removal of
tool marks and for smoothing edges, the number 50 grain polishing band
should be used. This band will remove small amounts of metal by grinding,
and is not, in the true sense of the word, a polishing band. When finer-
grain polishing bands are used on the bandsaw machine, soft metals like
aluminum or cast iron should not be polished, or the band will quickly fill
with metal particles, reducing the cutting action of the polishing band.
(3) Polishing Speeds. Polishing bands should be moved at speeds between
75 and 260 feet per minute (fpm), the faster speeds being used for softer
materials and the slower speeds being used for harder materials. The band
speed for polishing is determined by the application.
For grinding, a 50
grain polishing band should be used at speeds between 50 and 300 fpm. For
general/coarse
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