User's Manual

Table Of Contents
As would be expected, both the 2nd and 3rd configurations proved to hold considerably
better than having set screws on only one side. The 3rd configuration usually resulted in
some performance improvement over the 2nd configuration however, it gave less
consistent results (probably due to the difficulty in getting all the set screws torqued
uniformly). The 2nd test of the same trial weight and set screws generally gave better
performance than the first test, however under repeated use, it is expected that the set
screws will eventually lose some ability to set into the rotor surface. Therefore, regular
inspection and periodic replacement of the set screws is recommended.
Trial Weights
Style Length (inches) Approximate
weight*
Max Inch/lbs
torque
Approximate Hold
(lbs)**
A1 0.4 7.4 g/0.25 oz 10 260
A2 1.0 17.4g/0.60 oz 10 515
A3 1.5 24.6 g/0.85 oz 10 530
B1 0.5 19.8 g/0.70 oz 25 690
B2 1.0 39.9 g/1.4 oz 25 1385
B3 1.5 57.1 g/2.00 oz 25 1760
C1 0.5 22.0 g/0.75 oz 30 750
C2 1.0 44.2 g/1.55 oz 30 1900
C3 1.5 63.5 g/2.25 oz 30 1615
*Weight with standard cup opposing cone set screw combination. Style Series A using
0.25 x 0.5 (1/4 - 20 x 1/2) cup and 0.25 x 0.25 (1/4 - 20 x 1/4) cone set screws. Styles B and
C using 0.25 x 0.75 (1/4 - 20 x 3/4) cup and 0.25 x 0.3125 (1/4 - 20 x 5/16) cone set screws.
These weights are approximate and vary slightly, especially if non-standard hardware sizes
are used. Accurate weighing is recommended before each use. Measured pounds of force
required to pull the trial weight off a piece of cold rolled steel in a direction of travel
perpendicular to the set screws.
** Measured pounds of force required to pull the trial weight off a piece of cold rolled steel
in a direction of travel perpendicular to the set screws. Knurled cup point set screws
torqued as shown. Cone point set screws not turned/torqued. Given value is the lower
value of at least two tests.
Balance
252
DRAFT