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Twiflex

Advanced Braking Technology

Website
Email Address
Address
9 Briar Road,
Twickenham,
TW2 6RB,
Middlesex,
United Kingdom
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Twiflex manufactures the world’s largest range of industrial disc brake calipers for industrial and mining applications. Founded in 1946, as an engineering research company, early products included centrifugal clutches and torsionally flexible couplings that are still manufactured today. In 1951 disc brake technology was introduced for industrial applications, and this new product range was consolidated in 1966 with the addition of industrial and marine disc brake designs based on original Dunlop patents.

Today, Twiflex’ program of continual development has established them as leading suppliers of advanced braking technology to world-wide customers, on such diverse applications as processing lines, marine propulsion, elevators and escalators, winches, wind turbine generators, as well as crane hoists and travelling motions, conveyors, mine winders and more recently grinding mills.

Caliper disc brakes for industrial applications

Twiflex cater for all combinations of brake actuation. Direct acting brakes may be specified with pneumatic, hydraulic or mechanical application. Additionally, spring applied (sometimes referred to as fail-safe) calipers are available, released by pneumatic, hydraulic, mechanical or electric operation.

Braking forces for a single caliper range from 290N (65lbf) for one of the smallest lever brakes, to over 730,000N (more than 165,000lbf) provided by the latest modular holding brake design, developed especially for grinding mills.

Clayton 25t automatic mining loco (axle) fitted with GMR-SD brakes (Olympic Dam, Australia).
Electro-hydraulic powerpack: PLC controlled, two radial piston pumps, 500l capacity and 190bar operating pressure (Gaobazhou Shiplift, Qiangjiang, China).
Erie Marion 8750 dragline Twiflex GMRSD, spring applied, air-released calipers and 500kNm torque ( Bucyrus, Australia).
38ft (20MW) SAG mill Twiflex VMSDP spring-applied, hydraulic-released calipers plus powerpack and 13MNm torque (Sossego Copper Mine, Brazil).
Overland conveyor, 950ft long, Twiflex VKSD brakes plus open loop electro-hydraulic control (Bowie Resources, USA).

Depending on the model selected a variety of features are offered:

  • Self-adjusting pad wear compensation
  • Sintered pads for high speed/high temperature applications
  • Wide choice of asbestos free, organic pad materials, including carbon fibre
  • Standard, marine, mining and other special levels of protection
  • Brake status monitoring (on/off, pad wear, pad replacement)

Electro-hydraulic power packs

Twiflex aims to provide a single source for all its customers by offering a comprehensive range of hydraulic power packs, which are cost-effective and flexible to meet a range of braking requirements. An easy PC menu-driven process allows the user to select the best system.

The ‘LC’ hydraulic power pack range offers a cost-effective solution with simple on/off and limited control suitable for the smaller calipers.

The ‘MP’ hydraulic power pack range is available with different control options, including multiple brake circuits, high flow systems (for rapid brake response), a fast approach circuit with progressive torque build-up, a hand pump, a heater or cooler, a rapid pressure dump, a one-shot brake release for a power failure condition and proportional control from the customers PLC.

Both open and closed loop control is available and Twilfex can offer an intelligent braking system especially designed for conveyor braking. Utilising a stand-alone encoder, PID loop control monitors speed and continuously adjusts brake pressure to follow a pre-selected start / stop profile.

Intelligent braking system

The Twiflex intelligent braking system has the following features:

  • Includes a UPS with battery monitoring (controlled stop during power failure)
  • Controls start time applications with high overhauling load conditions
  • Controls stop time independent of load and speed
  • Fully enclosed in a NEMA 4 cabinet
  • Features on-board fault diagnostics and alarms interfacing with the users PLC

Global support

Twiflex, part of the heavy duty clutch brake division of US group, Altra Industrial Motion, is a leader in providing braking solutions to a global market. At its head office and manufacturing centre in the UK, Twiflex is able to provide a full design and development service along with both sales and support (including on-site commissioning) through a large worldwide distribution network.

Braking for Venezuela’s Longest Conveyor

Snaking its way down a 500m high mountain, Venezuela's longest conveyor smoothly carries 1600t of bauxite every hour to stockpiles or rail wagons before transporting it 50 miles north west to the Orinoco River.

Braking for the World’s Deepest and Fastest Man Riding Hoists

Years of reliable operation in deep hoist mining have placed Twiflex as a world leader in the field of mine winder braking technology. This leadership was further reinforced when Twiflex was chosen as the brake manufacturer for two of the world's deepest and fastest man riding hoists.

Mine Hoist Brakes from Twiflex

When selecting brakes for mine hoists, it is important to consider factors such as the depth of the shaft, the number of levels, stopping profile, drum design and payload in order to calculate the braking torque required for each application.

Twiflex Brakes for Canadian Eléonore Gold Mine Hoist

A leading designer and manufacturer of mine hoists recently specified Twiflex VMS3/SPS brakes for use at Goldcorp's Eléonore gold mine in northern Canada. The mine is projected to process 7,000t throughput a day, producing 600,000oz of gold a year over the 15-year life-of-mine.

Twiflex Installs VCS Calipers on Coal Conveyor in Perth

Two Twiflex spring applied hydraulically released VCS type calipers acting on a metre diameter disc are installed on the tail drive of each conveyor. They are used to bring the system to a safe and controlled stop and to act as a holding brake when the conveyors are stationary.

Global Repair and Support Service for the Mining Industry

Equipment used in the mining industries is subject to extreme mechanical stresses: it has to operate in challenging climatic environments, yet has to work reliably with an operational lifespan frequently measured in decades.

3 June 2019

New High-Energy Clutch for Dredging Applications

Massive power requirements, huge inertial loads and the ever-present risk of a blockage; all of these factors have to be managed by the clutch assembly, which has recently had a technological boost, thanks to Wichita Clutch.

1 May 2019

Industrial Hydraulic Brake Packages Provide Single-Source Convenience

A variety of standard and custom hydraulic brake packages from Twiflex are designed to meet the static holding and dynamic (emergency) stopping duty requirements of many types of applications, including elevators, ship loading gantry cranes, escalators, metal mill ladle cover hoists, amusement rides, conveyors, cold steel mills, ski lifts and more.

5 April 2019

Your Next Big Brake

Controlling loads in the heaviest engineering applications can require brakes capable of generating torque measured in the millions of newton metres. Twiflex product manager Tony George explains how these giant brake systems are engineered.

15 June 2018

Twiflex TLB Turning, Locking and Braking System for Variable Pitch Axial Fans

A leading global manufacturer was looking for ways to improve the safety on its axial fans used at coal-fired power plants. The large electric motor-driven forced draft, induced draft, and primary air type fans are critical to boiler air and flue gas flows in the steam generating process.

7 September 2017

Twiflex to Attend SME 2017

SME's 2017 Annual Conference & Expo and the Colorado Mining Association's (CMA) 119th National Western Mining Conference & Exhibition will provide the knowledge, insights and information you'll need to not only survive but thrive in an era of rapid economic and market change.

27 January 2017

New VSD Brakes Harness the Latest Performance Developments from Twiflex

The range of modular brake systems from Twiflex has been further expanded with the launch of the new VSD series, which incorporates several of Twiflex's newest technological improvements. Designed for use in a variety of industrial braking applications, the VSD series is simple to install, adjust and maintain.

9 June 2016

Dragline Motor Braking Systems

Twiflex offers the largest range of industrial disc brake callipers in the world. Spring applied units may be retracted pneumatically, hydraulically or electrically (depending on calliper design) while most direct acting brakes have some form of positive retraction device. A key market for the company is mining, including brakes for large dragline motors.

5 February 2016

Twiflex Launches Conveyor Brake with Unique Safety Feature

Twiflex Ltd., a part of Altra Industrial Motion, has introduced a new disc brake for mining and conveyor applications. The VBS modular brake features large pads and IP65 protection, making it ideal for high-speed conveyor drives in mining and quarrying applications.

18 February 2014

Twiflex Introduces New Conveyor Brake Disc

Twiflex has introduced a new disc brake for mining conveyor applications. The VBS modular brake features large pads and IP65 protection, making it ideal for high-speed conveyor drives.

18 February 2014

Twiflex Modular Braking System Ensures Safety and Reliability on Sag Mill at New Copper and Gold Mine

When Mount Milligan Mine in British Columbia, Canada, commences production in 2013, it is anticipated that it will produce 81 million pounds of copper and 194,000 ounces of gold annually - vital at a time when demand for copper in particular is at an all time high and likely to outstrip supply for years to come. Key to the production of these important resources will be a new 22MW SAG mill, with vital braking operations performed by Twiflex 30MNm modular brakes.

2 August 2011

Twiflex Provides Modular Braking System for South African Mine

Twiflex modular brakes are providing up to 35 MNm of total braking torque on two 8-metre ball mills, which are part of South Africa's - and probably the world's - biggest platinum concentrator, at Anglo Platinum's Mogalakwena (previously PPRust) mine near Mokopane.

6 August 2010

New Twiflex VCS MK 4 Caliper Brakes Engineered With 50% More Pad Area

Twiflex Limited's new technologically advanced VCS MK 4 caliper brakes have been engineered to provide a 50% increase in pad area, providing improved stopping and holding in a wide range of critical applications, including mine hoists, conveyor drives, cranes, ship loaders, wind turbines, and drill rigs in industries including mining, steel, pulp and paper, and marine.

16 May 2010

Twiflex – Record Breaks for Mill Brakes

Considered the first of it's kind, Twiflex has developed a modular safety brake system for the latest generation "gearless" SAG and Ball Mills of up to 20MW capacity. Known as the VMS-DP, the brake, which is spring applied and hydraulically released, can achieve a tangential bre

19 August 2005

Twiflex Launches VMS3-SP

Bigger, better, faster, stronger! Twiflex are pleased to announce the arrival of VMS3-SP, an improvement on the already excellent, VMS2-SP. The new brake is (as before) a spring applied, hydraulic released safety brake aimed specifically at the Mine Hoist market.

19 August 2005

Twiflex Appoint Rathi Turboflex for India

Twiflex is very pleased to announce the appointment of Rathi Turboflex Pvt Ltd as distributor for Twiflex products in India. Rathi Turboflex replace Greaves Cotton Ltd as distributor for India. Rathi Turboflex is a division of the Rathi Group which employ 440 staff in

19 August 2005

GMR Makes the Difference in Australia

Disc brakes were first introduced into the industrial applications environment after being pioneered in production passenger vehicles during the late 50s and early 60s. When used for vehicle manufacture, disc brakes were seen as a major improvement in safety and performance over

1 June 2005

Twiflex – The Record Breaks for Mill Brakes

Considered the first of its kind, Twiflex has developed a modular safety brake system for the latest generation "gearless" SAG and Ball Mills of up to 20MW capacity. Known as the VMS-DP, the brake, which is spring applied and hydraulically released, can achieve a tangential breaking force of

11 August 2004

Twiflex Limited

9 Briar Road
Twickenham
TW2 6RB
Middlesex
United Kingdom

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