Gearboxes are an integral part of PTG Holroyd’s technology as they
drive the axes in its machines, making accuracy and precision key. For its machines, the company had very specific requirements for output torque, accuracy and product dimensions. PTG Holroyd therefore turned to Apex Dynamics for the gears. Working alongside PTG Holroyd’s engineers and design teams,
Apex Dynamics UK identified the best possible products for the helical grinding machines – with planetary gearboxes meeting the demands. To suit application requirements, the APC-Series of rotary flange
style gearboxes (with 55 to 1 ratio) and the Apex AD-Series of compact gearboxes (with 50 to 1 ratio) were specified. Both ranges deliver high torque, low backlash of less than 1 arc-minute, and superior levels of accuracy. The APC-Series comes with a patented curvic coupling output, giving a high concentricity, low runout, high torque, zero backlash connection. Its case hardened and ground gearing offers high accuracy and high wear resistance for the gear train and, by adding a fourth planetary gear, torque capacity is boosted by up to 25%. The compact helical, one-piece planetary cage design of the Apex AD
series provides PTG Holroyd with a range of benefits, including the stiffest and most accurate rotating flange design currently on the market. It can deliver superior accuracy of less than 1 arc-minute with as short as 70mm flange to flange, making it capable of fitting into the smallest spaces. “We have been using Apex Dynamics products for some time in our machines and have been very pleased with the relationship we have built with the company,” commented Philip Hart, PTG Holroyd technical director. “When we looked for the correct gearboxes for our high precision applications, we found Apex Dynamics products to be very reliable and able to meet our high standards for speed, accuracy and precision at the interface between motor and machine.” Malcolm Hillary, Northern area manager for Apex Dynamics UK,
added: “PTG Holroyd is a great company to work with and has a rich history. Our product range and customer support is ideally suited to its advanced high-precision helical grinding machines... With 49 series of gearboxes, more than 20 years’ industry experience, and the highest level of technical production capabilities, we can supply the best possible advanced high speed, low backlash solutions for any needs.”
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