•
Equivalent static radial load
Equivalent static radial load is obtained by formula (9) below.
2M
max
P
O
= Fr
max
+ 0.44 Fa
max
(9)
dp
Where, the variables of the formula are:
Po:
Equivalent static radial load in N (kgf)
M
max
:
Maximum torsional moment in N•m(kgf•m); obtained by the formula (1)
Fr
max
:
Maximum radial load in N(kgf); See Fig.1.
Fa
max
:
Maximum axial load in N(kgf); See Fig.1.
dp
:
Circular pitch of roller: See Fig.1 and Table 1.
• Static
safety
factor
Generally, the static safety factor is limited by the basic static load rating (Co).
However, for the heavy duty, the factor is limited by the following formula:
Co
fs =
(10)
Po
Where, the variables of the formula are:
fs:
Static safety factor;
For precise positioning operation:
fs > 3
For operation with shock and/or vibration: fs > 2
For normal operation:
fs > 1.5
Co:
Basic static load rating in N (kgf). See Table 1.
Po:
Equivalent static radial load in N (kgf); obtained by formula (9).
23
Chapter 2 Guidelines for sizing
Summary of Contents for FHA Series
Page 2: ...FHA C series...
