３－１８
Allowable load (gram)
Actual load (gram)
Reduced maximum speed
（
rpm
）＝
Maximum speed
（
rpm
）×
Do not exceed the maximum speed and the allowable load of rotor and
bucket.
An excessive speed or overload may cause a damage to the rotor, bucket
and the centrifuge.
If the load exceeds the limit, reduce the maximum speed as shown in the
formula 3-2 and set the actual speed below the reduced maximum speed.
[ formula 3-2 ]
As for rotation radius, please refer the page 6-4, 6-5, 6-10 and 6-12. The
maximum centrifugal force being indicated in the said pages is calculate by
substituting the maximum radius of gyration of the rotor for the radius of
gyration of each rotor (cm) and by rounding the first digit above the decimal
point of the calculation result.
By setting the rotation radius, an accurate speed and centrifugal force can be
switched. Factory default at the time of delivery is 14.6 cm
．
Refer to page 3-12.
（１）
When the gravity of sample is 1.2 or higher or when a special tube is used,
check the allowable load of the rotor and bucket.
（２）
Regarding allowable load on rotors and buckets at the maximum speed refer to the
appropriate Specification Table for rotor in use.
（３）
The allowable load includes the weight of sample, cushions, adaptors, tubes, caps,
and racks. (The weight of bucket is not included in the allowable load.)
WARNING
NOTE
３－９
.
Calculating Centrifugal Force
You can readily calculate the centrifugal force by assigning the Rotation Radius and speed
in the following equation:
Please refer to the Nomograph for Centrifugal Force Calculation at the last page of this
manual.
３－１０．
Allowable load and Reduced maximum speed
Section 3 Operation
Ｃ
entrifugal force RCF(
×
g
)= 11.18
×
Speed N
（
rpm
）
1000
2
×
Rotation Radius R(cm)
[formula 3-1]