Special Cased Instruments, ContinuedNeedlepointsNeedlepoints provide a stable pivot point for compasses and dividers to rotatearound while you use them. Needlepoints are either tapered, shouldered, ora combination of the two.Figure 2-35 shows the different combinations of needlepoints.Protect needlepoints when they are not in use and sharpen them whennecessary.Figure 2-35. —Needlepoints.To sharpen needlepoints, follow this table:StepAction1Wet one edge of the oilstone and place the needle shoulder againstthe edge.2Twirl between thumb and forefinger.3Stroke back and forth on oilstone while twirling.Figure 2-36 illustrates the shaping of a compass needle.Figure 2-36. —Shaping acompass needle.Continued on next page2-30
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