FED-STD-791D
6.7.1.2 Table II shows the numerical demerits to be assigned to different types and
degrees of deposits.
TABLE II. Demerit rating numbers used for numerically describing deposits.
Deposit type
Demerit rating number
Light
Medium
Heavy
Varnish
1
3
5
Sludge
6
7
8
Smooth carbon
9
10
11
Crinkled carbon
12
13
14
Blistered carbon
15
16
17
Flaked carbon
18
19
20
6.7.1.3 Table III defines deposit types and severities.
6.7.1.4 The following six major items in the test bearing section of the bearing machine
are visually inspected and rated to obtain the overall deposit demerit rating:
a. End cover.
b. Spacer and nut (considered to be one piece).
Table III. Description of deposit types and degrees.
Deposit type
Degree
Description
Varnish
-----
Varnish or lacquer-like coating, shiny
Light
Light gold or yellow in color, translucent
Medium
Brown or dark brown in color, translucent
Heavy 1
Black in color, opaque
Sludge
-----
Shiny, oil emulsion of carbon and oil usually light brown
in color. Remove by wiping with a rag.
Light
Less than 1/64 in thickness
Medium
1/64 to 3/64 in thickness
Heavy
3/64 in thickness or more
Smooth carbon
-----
Carbonaceous coating not removable by wiping with a rag
Light 1
Less than 1/64 in thickness
Medium
1/64 to 3/64 in thickness
3/64 in thickness or more
Heavy
188
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business