Description
RECOMMENDED BY THE SPRING RESEARCH & MANUFACTURERS’ ASSOCIATION
This calculator designs helical compression and extension springs in accordance with the relevant British Standard No.1726. It is double sided, one side dealing with the stress calculation and the other with the Rate and Extension.
It enables spring sizes to be determined very rapidly as the Rate and the Stress for a particular spring can be read off in a few seconds by setting the dials to the appropriate values.
A scale is provide for the Spring Index and where neither wire diameter nor coil diameter are specified initially, design can proceed rapidly on the basis of the appropriate index figure.
The stress correction factor for curvature of the wire is auto matically indicated and taken into account in the calculations.
SCALE RANGES
Wire dia. .006″ to 1.2 Number of Coils 1 to 300
Coil dia. .03″ to 12″ Stress 4,000 to 300,000 Ibs./sq.in
Load .05 to 40,000 Ibs. Deflection .01″ to 15″
RECTANGULAR AND SQUARE WIRE SPRINGS
The calculator will also handle springs made from rectangular or square wire as well as the normal round wire springs, additional scales being provided for this purpose.
Imperial model 4 colour
or Metric model SIZE: 7-5/8″ dia.
in case with instruction booklet.