The AM40 is a digital protractor manufactured by Winton Machine. It is suitable for use in measuring the bend angle of various bend configurations.
The device measures from 0° to 360°, at increments of 0.1°. It offers repeatability of bend angle measurement through a high-resolution encoder. The unit is equipped with a digital readout that displays large numbers, and updates continuously showing the real-time bend angle. It measures a bend angle by means of two arms. One arm is fixed, while the other is a dynamic arm with rotational and linear motion in two axis. The protractor features sealed roller bearings for guiding the rotational motion, and a linear ball bearing that guides the linear motion.