Every manufacturing operation we perform revolves around a specific control processing technique called Geometric Dimensioning and Tolerancing (GD&T)

It ensures consistency through three separate datum surfaces, ultimately leading to tighter pieces and extremely precise parts. Six degrees of freedom are considered along a 3D coordinate system through datum surfaces A, B and C. With A controlling three degrees, B controlling two degrees and C controlling one degree along the different axis’. This triangulation method is instrumental in pinpointing exact locations on both the parts and the fixtures. Using the six degrees of freedom established by the datum surfaces, GD&T is a means of continually attaining and measuring consistency.

Through the implementation of this technique, our machinists and engineers are able to refer back to a controlled feature on each part at any point during the manufacturing process. First, GD&T is essential to maintaining and controlling the part’s weight, balance and dimensional accuracy. Next, the inspection process remains consistent from part-to-part and batch-to-batch, allowing for materials to flow smoothly on the production line. Lastly, by constantly referencing back to the datum surfaces we are able to make finite adjustments and improvements without abandoning even the smallest detail. Not only do our strategies determine a strict standard for all individual products, but they serve as a built-in auditing system active in maintaining that standard day-to-day and for years to come.

A typical V8 racing engine running at 10,000 rpm equates to the rotating assembly spinning at over 166 times per second with virtually all of the force then being transferred through the connecting rod. For every revolution, the piston and connecting rod must go through one full compression cycle and one full tension cycle. Under these extreme conditions, connecting rods manufactured with a wider tolerance margin are at risk of causing oscillations and stress concentrations in the rotating assembly. In turn, the friction of the reciprocating assembly is compromised. GD&T works to eliminate these risks by enabling Oliver to reach the highest possible degrees of concentricity, circularity, parallelism, perpendicularity and a number of other factors that govern the relationship between the crank and pin bores of our connecting rods.