A New Generation of Modular Precision Gearboxes

Sumitomo has revamped its F4CF-D series of precision gearboxes with a single-stage version based on Fine Cyclo technology. This new generation has introduced an increase in torque per size and range of sizes; it also features a smaller footprint, lower weight and less noise. All this makes this series easier to integrate.

In 2015 Sumitomo Drive Technologies designed the precision gearbox series F4CF-D. Then, in 2017 the modular system was expanded to facilitate the addition of compatible components, i.e. motor mounting capability. Recently, the series has been further developed as the F4CF-DA series. Based on the proven Fine Cyclo Technology, this new development offers several significant advantages. The most important innovation is the significantly increased torque per unit size. The number of sizes in the series line up has also been significantly expanded in response to customer demand for more individuality and new sizes have been developed accordingly. The series gearboxes are approximately 8% smaller in diameter and 5% shorter in length compared to previous versions. Despite this reduction in size, performance has been increased by approximately 20% across the range, giving a triple benefit: more power, less space and conversely less weight. The noise levels of the series have also been optimised and significantly reduced. This is an important factor when people are working near the drive applications, as for example in the medical field.

Easy integration into systems

All sizes of the DA series can be easily integrated into systems. The motor shaft is connected to the gear unit by way of a clamping ring which offers a friction connection eliminating the necessity for the customer to adapt the motor connection to suit. For each of the DA series sizes, the connection of several motor shaft diameters is possible, allowing the use of motors from many different manufacturers. The connection geometry does not require a complex installation, nor does it require an adjustment of the drive shaft by the customer. Sumitomo are therefore able to offer a remarkably simple installation of both the gearbox and the motor. Thanks to the partnership with the motor specialist Lafert, Sumitomo can also offer servo motors and controllers from a single source.