Mitutoyo 331 Series Spline Outside Micrometer

The Mitutoyo SPM-100MX Measuring Range 75-100 mm Spline Micrometer SPM 18483815 is a specialized variant of the conventional micrometer, designed to accurately measure the dimensions of splined shafts and other similar components. It is a precision measuring instrument widely utilized in engineering, manufacturing, and automotive industries, where splined shafts play a critical role in transmitting torque and rotational motion. The spline micrometer shares similarities with the standard outside micrometer in terms of its structure and functioning. It consists of a sturdy frame that houses the internal components and provides stability during measurements. The primary components include an anvil, a spindle, a thimble, and a ratchet. The anvil and spindle are precisely crafted to fit into the grooves of the splined shaft, ensuring proper contact and accurate measurements. The thimble is equipped with fine markings to allow for precise readings, while the ratchet ensures consistent and uniform pressure application, preventing potential damage to delicate splined surfaces. During operation, the spline micrometer is carefully positioned around the splined shaft, and the thimble is rotated to bring the anvil and spindle into light contact with the spline's teeth. The user then employs the ratchet to apply gentle pressure until a definite resistance is felt, signifying proper contact. The measurement is obtained from the thimble and sleeve scales, providing the accurate dimension of the splined shaft. Spline micrometers are indispensable tools for quality control and inspection processes, ensuring that splined components meet strict dimensional tolerances and function optimally within mechanical assemblies. Their ability to precisely measure spline dimensions plays a crucial role in maintaining the efficiency, reliability, and safety of various mechanical systems, Rangeing from automotive drivetrains to industrial machinery.