Machinery Repairman

File Bands
A file band consists of a long steel strip that has a
number of file segments mounted on it. It can be
flexed around the band wheels and still present a
straight line at the point of work. Figure 4-9 shows
the file band flexing principle and the construction of
a file band.
Polishing Bands
Abrasive coated fabric bands are used for
grinding and polishing operations in a band tool
machine. They are mounted in the same way as saw
and file bands. Figure 4-10 shows a polishing band.
Figure 4-11 shows a backup support strip being
installed, before the polishing band is installed.
Band Tool Guides
As an MR you will primarily use three types of
band tool guides. They are saw band guides, file band
guides and polishing band guides.
SAW BAND GUIDES.—The upper and lower
guides keep the saw band in its normal track when
when you apply work pressure to the saw. The lower
Figure 4-9.—File band flexing principle and construction.
4-6
guide is in a fixed position under the work table, and
the upper guide is attached to a vertically adjustable
arm above the table which permits you to raise or
lower the guide to suit the height of work. To obtain
adequate support for the band and yet not interfere
Figure 4-10.—Polishing band.