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Chip Of The Old Nordbloc

15 March 2013

Nord Drivesystems has expanded its Nordbloc SK industrial gear unit range with four smaller sized models with a choice of helical or bevel-helical gear stages

The new gear units, in sizes 7, 8, 9 and 10, are available for output torque from 25 to 50kNm in the same characteristic Unicase monobloc design as the present SK range, which also which extends to 242kNm in sizes 11, 12, 13, and 15.

The Nordbloc SK range is aimed at heavy engineering applications and is supplied as a pre-assembled modular sub-assembly mounted on a choice of base frames, complete with gearbox, motor and coupling, and a full range of options and accessories. ATEX, food and beverage, and sensitive environment versions are available.

Specifying a complete sub- assembly ensures that project planning, purchasing and system commissioning is more straightforward. The modular system takes care of gearbox and motor orientation, with options of elastic or fluid coupling and a choice of fixed or swing base frames. Further options include output shaft types and positions, motor-gearbox coupling, drum or disc brakes, lubrication management, radial or axial cooling fans, auxiliary drives, torque support and surface protection.

As with the existing larger sized units, both two and three-stage gear units are available with a wide choice of ratios. The symmetrical Unicase gearbox design permits mirror image installation for dual drive applications. Nord’s own range of IEC-frame, energy-saving three-phase motors are used throughout. SK 500E frequency inverters are available to offer complete gear unit and drive combinations, with high performance motor control and connection to all current factory networking communications systems.

The Unicase gear unit housing system was originally developed more than 30 years ago. The one- piece design, produced on specialised CNC machines, yields precision, rigidity and strength. As all bearings are mounted directly into the cast iron housing, without dividing seams between the drive and gear unit, shaft axes may be staggered in a compact space- saving arrangement that allows the use of larger roller bearings. The result is a much longer operational life than split housing designs, with quieter running and reduced maintenance.
  • Aimed at heavy engineering applications, the Nordbloc SK range is supplied as a pre-assembled modular sub-assembly
  • Specifying a complete sub- assembly ensures project planning, purchasing and system commissioning is more straightforward
Nord has also published a new brochure presenting the choice of surface protection treatments offered across its geared motors and drive units. It covers the latest generation high-solid paint and powder coat finishes, as well as the proprietary NSD TUPH (pronounced "tough”) surface conversion treatment, which provides the durability of stainless steel with aluminium gear units and geared motor frames.

The range of high-solid paint finishes has been successfully tested to relevant ISO standards for adhesion, corrosion resistance and delamination. A wide choice of two-pack primer and top coat components in various coat thicknesses ensure cost efficient surface protection for indoor, outdoor and corrosive environment installations. Antimicrobial lacquer coatings for food industry and other environmentally sensitive areas are available for all paint systems.

Nord introduced its NSD tupH sealed surface conversion system in 2012. It employs a catalytic process that permanently bonds a high- hardness layer to an aluminium substrate. The durable finish requires no further treatment, is colourless, and highly resistant to aggressive cleaning chemicals and extreme environments – even under high pressure washdown conditions. With weight saving advantages when compared to stainless steel and with a six to seven-fold increase in surface hardness compared to aluminium, units can be combined with stainless steel shafts, special sealing components, and special lubrication for harsh environments or high hygiene areas. Download the brochure from http://bit.ly/XYiNax