α |
Pressure angle of gear teeth |
° |
b2 |
Face width of gear teeth |
in |
Bi |
Size of hole in inner ring |
in |
Bo |
Size of hole in outer ring |
in |
D2 |
Pitch diameter of gear |
in |
di |
Inside diameter of inner ring |
in |
Di |
Internal diameter on outer ring |
in |
Do |
Outside diameter of outer ring |
in |
do |
External diameter on inner ring |
in |
Dp |
Diameter of bearing raceway |
in |
dr |
Internal diameter on inner ring |
in |
Dr |
External diameter on outer ring |
in |
Dw |
Diameter of rolling element |
in |
FD |
Full depth involute spur gear
(ref. ANSI B6.1-1968, R1974 or ISO 53:1998) |
- |
FS |
Fellows stub involute spur gear
(ref. Machinery's Handbook, 18th Edition) |
- |
H |
Height of overall bearing assembly |
in |
Hi |
Height of inner ring |
in |
Ho |
Height of outer ring |
in |
Li |
Bolt circle in inner ring |
in |
Lo |
Bolt circle in outer ring |
in |
m |
Module of gear teeth = 25.4/Pd |
mm |
nf |
Number of lubrication
nipples/fittings per plane |
- |
ni |
Number holes in inner ring |
- |
no |
Number holes in outer ring |
- |
Pd |
Diametral pitch |
- |
SD |
Stub involute spur gear
(ref. ASA B6.1-1932) |
- |
x2 |
Addendum modification coefficient of gear teeth
("+" sign increases tooth thickness at D2
and "-" sign decreases tooth thickness at D2) |
- |
z2 |
Number of gear teeth |
- |