SPECIALIST EQUIPMENT
CHALLENGING THE LIMITS
Ralf Matke discusses the benefi ts of increasing the effi ciency of industrial gearboxes
I
n various grinding processes in the mining industry, it is no longer just about the reliability and availability of the drives.
For instance, engineers use high- pressure grinding rolls (HPGRs) where the energy-eff icient size reduction of hard rocks, minerals and ore is required. Fluctuating loads, extreme peaks, continuous and non-stop operation for maximum throughput, high axial and radial stress on the bearings and structural components, heat, and dusty conditions have all placed extreme demands on the drive system. Couple that with the OEMs continually increasing performance with innovations that have doubled the service life and output of the HPGRs in the last couple of decades.
CHALLENGING THE LIMITS WITH ONE PRODUCT MODEL “With an eye on the market’s continuous request for higher performances and output, we invest continuously in the development and improvement of our Redulus4F gearbox series,” says Dr Nico van de Sandt, global head of engineering Industrial Drives at ZF. “The focus, or rather the strength, of the next generation of successful Redulus gearboxes continues to be on the entire range of highly stressed industrial applications. We aim to support the current technical developments and challenges within these applications with the best products.” The new Redulus4F
still stands for a fl exible design to fi t most applications and has a compact design to reduce cost and handling eff orts. The latest series guarantees advanced serviceability to minimise downtime, and ZF has maximised the load capacity to increase lifetime and performance. ZF says it develops gearboxes at
Schematic of the latest generation of Redulus gearboxes
the highest technical level in terms of torque density, service life and robustness. The new series has 20 gearbox sizes with a torque range of 127kNm up to 7,200kNm (nominal) which is approximately 50 to 80% higher than previous models. The torque densities of Redulus4F currently leading the market.
are 32
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gearbox series
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