Company Overview

Brevini Power Transmission, part of the Brevini industrial Group, is a global leader in mechanical transmissions and hydraulic systems. The group manufactures a broad product range including planetary gear drives, helical and bevel-helical gearboxes, winches, and rack and pinion drives. With a turnover of 323 million Euro and 1200 employees, it operates worldwide through subsidiaries and sales offices.

Product Portfolio

• Rack and Pinion Drives (POSIRACK): Precision linear motion drives designed for injection molding machines.
• Helical and Bevel-Helical Gear Reducers: Parallel and right-angle gearboxes for diverse industrial uses.
• Double Shaft Gear Reducers (POSIRED 2): Gearboxes with dual output shafts for complex drive needs.
• Universal Compact Right Angle Gear Motors (POSIRED TS, POSIRED N): Compact orthogonal shaft solutions.
• Bevel Gear Units (POSIRED D): Angular power transmission gear units.
• Single and Twin Screw Extruder Drives (POSICROSS LN, POSIREX/POSIREX I, POSITWIN GL): Specialized for extrusion machinery.
• Industrial Planetary Gear Reducers (POSITORQUE): High torque units for heavy-duty applications.
• CVT and Industrial Variators (CVT/POSICHAIN/POSIDISC): Continuously variable transmissions and speed variators.
• Parallel Axis Gear Reducers with Extended Center Distance: For applications requiring large shaft spacing.

Global Sales and Service Network

Brevini Power Transmission has a comprehensive global presence with subsidiaries and sales offices across Europe, Asia, Americas, Africa, and Oceania. Key countries include Germany, Italy, USA, China, India, Japan, Korea, Australia, South Africa, and Latin America. This network ensures localized sales, technical support, and after-sales service.

Subsidiaries and Distributors

The company partners with numerous specialized distributors worldwide, including in Spain, Sweden, Japan, and Korea, supported by regional sales offices in Germany and Europe to provide focused customer service.

Competitive Advantages and Market Position

Brevini leverages its full product range, global service capabilities, and extensive application experience to serve mobile machinery and industrial equipment sectors. The company emphasizes reliability, precision, customization, continuous innovation, and a strong global footprint.

Contact Information

Headquarters: PIV Drives GmbH, Justus-von-Liebig-Straße 3, 61352 Bad Homburg, Germany.
Phone: +49 (0) 6172-102 0
Email: [email protected]
Website: www.piv-drives.com

POSIRACK Rack-and-Pinion Drive System Overview

The POSIRACK system, developed by PIV Drives since 1994, is tailored for injection molding machines, particularly for mould locking. Thousands of units operate globally, demonstrating high reliability and customer satisfaction.

Design and Development

Developed in close collaboration with customers, POSIRACK supports mould locking, injection, nozzle pressing, and plastification. It features a compact, quiet-running helical gear drive combined with spur gears and a double-toothed rack. A close-coupled motor flange integrates the motor into the compact design.

Technical Features

• Gear Quality: Case-hardened, profile-corrected, and ground gears and racks ensure reliable transmission of high acceleration and braking torques.
• Load Handling: Optimized gear tooth forms absorb bending and torsional loads effectively.
• Noise Reduction: High contact ratio and optimized tooth design minimize noise and ensure smooth operation.
• Rack Guidance: Internal rack guidance ensures proper load sharing and stability.
• Performance: Capable of rack speeds exceeding 2000 mm/s and rack forces up to 450 kN.

Manufacturing and Materials

PIV Drives applies extensive materials engineering expertise and operates its own thermal treatment facility to guarantee consistent, high-quality gear performance and durability under demanding conditions.

Global Distribution and Support

An extensive network of international distributors and subsidiaries across Europe, Asia, and the Americas provides localized sales and technical support for POSIRACK products.

Summary of Critical Parameters

Key Recommendations and Notes

• POSIRACK is optimized for high acceleration and braking loads typical in injection molding machines.
• Uniform load distribution on the rack is critical for performance and longevity.
• PIV Drives reserves the right to update product specifications without prior notice to incorporate improvements.

Additional Technical Details

The rack-and-pinion drives feature hardened, cemented, and ground toothed wheels with profile correction to handle bending and torsional loads, ensuring durability and reliability. Locking forces range from 300 kN to 10,000 kN depending on model, with maximum input speeds between 1200 and 3000 rpm. Axial thrust values vary from 15 kN to 400 kN, and stroke lengths range from 330 mm to 1200 mm. Mounting and flange dimensions are standardized for ease of integration.

Design and Quality Assurance

Manufacturing adheres to strict quality standards including precise gear tooth grinding and profile correction. Heat treatment is controlled in-house to ensure consistent product quality. The design prioritizes silent operation and high-speed capability.

Usage and Application

POSIRACK drives are especially suited for injection molding machines requiring high forces and speeds. Their robust design and high-quality manufacturing make them reliable in demanding industrial environments.

Legal and Copyright Notice

The document content is protected by copyright laws. Unauthorized reproduction or distribution is prohibited. PIV Drives reserves the right to make technical improvements without prior notice.

Additional Product Range

Besides POSIRACK, PIV Drives offers helical and bevel-helical gear reducers, double shaft gear reducers, bevel gear units, extruder drives, planetary gear reducers, CVT and industrial variators, and parallel axis gear reducers with extended center distances.