The solution to runout and taper

Thursday, June 13, 2019

Shaft runouts and tapers within bores are common design features of transmissions and gearboxes, and for automotive and machining manufacturers, it is critical that the dimensions of these aspects are precisely measured.

Why precisely measuring runout and taper is important

This measurement accuracy is crucial because these components are parts of a high-tolerance system and must retain their integrity and maintain their performance under significant heat, load and other dynamic forces.

The main challenges in accurately measuring the runout of a shaft or taper within a bore relate to the tolerances involved with these components, which can be within a few microns, and the fact that dimensional checks may be over long distances.

Furthermore, in this testing and quality-control process, it is often the case that readings from multiple sensors are required. As such, a highly accurate and reliable repeatable measurement process is vitally important.

How to check runout and taper to a high degree of precision

The solution to accurately checking the runout of a shaft or taper within a bore to a high degree of precision is to use digital sensor technology, such as that designed and developed by Solartron Metrology.

This specialist digital measurement technology offers unrivalled durability, accuracy and repeatability. The versatile digital sensors repeatedly measure the awkward dimensions of intricate geometric aspects to a very high degree of accuracy, and at a lower cost than that of non-contact alternatives.

How Solartron specialist digital sensor technology works

Solartron offers a wide range of digital sensors with class-leading resolution and repeatability that are capable of detecting and accurately measuring even the tightest runout or taper to a high degree of precision.

This range of superior digital sensors includes pencil probes that are built to take a sideload and linear encoders, and block gauges, flexures and mini probes for bore applications.

How to optimise the benefits of sensors for checking runout and taper

The advantages of this digital sensor technology can be further optimised when used with the Solartron Orbit 3® Digital Measurement System. The system is a digital, modular network built for easy data collection (measurements can be taken and positions checked) and analysis via a PC, PLC or existing in-house network.

With regard to checking the runout of a shaft or taper within a bore, the benefits of using the Orbit® network include:

The ability to take multiple synchronised readings in a dynamic setting, for real-time A+B or similar calculations.

The inclusion of software drivers that enable connection to any Excel or SPC software pack.

The ease with which third-party inputs can be applied. For example, a glass encoder can be connected via an encoder interface module, which can be linked to any TTL or square wave output.

Furthermore, up to 150 Orbit 3® digital sensors can be networked together in a single interface, enabling rapid, repeatable and reliable data acquisition. Interfaces include USB, Ethernet TCP/IP, RS232, Bluetooth wireless and six PLC protocols.

Find out more about Solartron Metrology’s products and our true precision guarantee by contacting our friendly team of experts on +44 (0)1243 833333 or