Frequently Asked Questions
Read below, feel free to contact us with for any additional information
Frequently Asked Questions
What are the major differences between your most common gage lines; 1200, 1100, and 911?
Most gage models (except the 1200 series) use etched glass scale technology to track follower position, with similar systems for headstock angle and carriage position (via longer tape scales and optical read heads). Some models may vary—engineering should confirm specifics.
The 1200 series uniquely uses laser interferometry with internal optics to measure follower and carriage positions, delivering superior radial and axial accuracy.
Vertical gages (911, 1100, 1200) are ideal for audit applications and longer, heavier parts due to reduced sagging and deflection. Horizontal models (1300, 1000) suit smaller or lighter parts where deflection is less critical.
All gages use granite bases for dimensional accuracy and thermal stability.
What is a CCMM?
How does Adcole achieve accuracy levels down to ¼ of a micron?
Our radial accuracy is largely derived from superior spindle runout performance. The rest comes from the accuracy of the devices used to track the position of the follower arm, whether glass scale or laser interferometry. This, combined with Adcole’s proprietary software that interprets the physical actions of the follower and handles the complex data and detects any deviation from the norm. Note, that only the 1200 series machines offer radial accuracy of ±0.25µm.
Adcole uses a laser interferometer in their model 1200 gages. Isn’t this an optical measurement, not tactile?
The 1200 series gages utilize a laser interferometry system to measure the precise positioning of tactile components such as the carriage and follower, delivering exceptional accuracy and repeatability. This advanced method surpasses the performance of traditional linear encoder-based models, offering a higher level of measurement precision. Notably, no other metrology company incorporates laser interferometry in their shaft measurement systems, making the 1200 series uniquely positioned at the forefront of innovation in the field.
What’s the difference between accuracy and precision?
Not always the same but can be equally important. Accuracy is how close to the bullseye we want to land while precision is how often we land in the same place. In the world of shaft metrology, this is better described as the attempted tolerance (bullseye) we are trying to reach and continuing to reach that measurement over and over again, or the repeatability of our gages, that you know that the data you are receiving is trusted.
How do you know when a follower needs to be replaced?
There are several ways to determine whether a follower needs replacement. While visual inspection is recommended to check for obvious signs of damage, wear is more commonly identified through analysis of plot data. Indicators such as roundness or profile errors—often appearing as peaks or valleys—can signal wear spots on the follower. These patterns are highly dependent on the follower tip design and the specific shaft application. Factors such as the follower tip shape, the motion of the components during rotation, and the geometry of the measured section (e.g., a cam lobe versus a round journal) all influence how wear manifests in the data. Adcole is capable of writing data corrections for worn followers but a follower will eventually need to be refurbished or replaced. Be sure to contact Adcole for support.
Can I measure a crankshaft on a model 911?
Generally, no as the model 911 was designed primarily for measurement of shafts with concentric or eccentric features. Orbiting features such as pin journals typically exceed the follower stroke of the 911. If in doubt, please contact us to review your application.
Which machines are best suited for automated or inline applications?
Our horizontal shaft measurement machines (1302/4/6 and 1310) were all designed to be used either inline or as standalone machines. The 1200DH and 1200HC models can be used for automated applications when properly equipped.
Can any Adcole gage model be used to measure surface finish in addition to dimensional characteristics?
Not at this time. Please see our model 1000 and 1000Z for automated surface finish inspection options.
Does Adcole supply master parts?
Adcole does supply third-party certified master shafts that can be used with many of our gages. In addition, Adcole also supplies coated reference parts which are handy for troubleshooting potential gage issues, process issues, and providing long-term stability data.
Does Adcole only supply tactile gages?
At this time, yes. Adcole remains focused on delivering the highest levels of accuracy and repeatability in measuring rotating shaft components through our decades-proven tactile gaging systems. We engineer our solutions to minimize sources of error often associated with optical systems, which can be influenced by lighting conditions, surface characteristics, and limitations in measuring complex or internal features. As a result, tactile gaging continues to be the preferred solution when precision, consistency, and reliability are more critical.
Are parts required to be cleaned prior to measuring?
Yes. Without cleaning oil, dirt, and metal shavings from the manufacturing processes will be included in the measured data.