Shaft Collars Hold Tight Face Tolerance

Shaft collars function as mechanical stops, clamps often used on split hubs, bearing faces and as a means for locating components on a variety of equipment including motors, gearboxes, linear actuators, packaging equipment, printing presses, medical devices, and measuring instruments. Shaft collars from Ruland are single point faced to ensure a high level of face to bore perpendicularity. The result is face runout of TIR < .05 mm (.002') on standard collars with even tighter tolerance on bearing locknuts and special designs.

A precise shaft collar face to bore relationship is important for many applications.

It ensures that components are both properly positioned and not tilted on the shaft.

Collar face perpendicularity also ensures even pressure on interfaced components.

Uneven pressure can result in premature failure of components such as bearings.

When shaft collars are subject to shock loads, precise facing reduces the likelihood that the position of the collar will be shifted.

A circular groove indicates the precision face on Ruland shaft collars.

The collars should be installed so that the groove is on the side that will receive shock loads or is against components needing precise positioning or even pressure.

Ruland offers shaft collars in aluminium, black oxide carbon steel and stainless steel, as well as engineered plastic collars.

One- and two-piece clamp-style designs are available with bore sizes from 3mm to 80mm.

Clamp-style shaft collars do not mar the shaft like traditional set-screw types (DIN 705).

Clamp-style collars also have higher holding power because they wrap around the shaft when tightened thus applying compressive stress nearly uniformly on the circumference of the shaft.

Two-piece clamp-style collars have an additional advantage since they can be installed on the shaft without removing other components.

Ruland uses forged socket hardware in all its shaft collars, which allows for higher screw torque and increased holding power.

Shaft collars are part of Ruland's complete product line which also includes rigid couplings with precision honed bores and five types of zero-backlash motion control couplings: beam couplings, bellows couplings, oldham couplings, miniature disc couplings and curved jaw couplings.

Better torque output from servo motor brake

Nexen Group has announced the new Eclipse Servo Motor Brake with superior torque output, offering rugged durability for dynamic stopping applications. This brake is an ideal solution for vertical and horizontal holding and braking applications for the packaging and material handling industries. These high-capacity, air-engaged brakes provide 20-50% more stopping torque compared to electric brakes and provide sufficient holding force to stall a servo motor.

Eclipse Servo Motor Brakes also offer improved operating safety and the prevention of premature brake burn-out.

They are designed for cool operation, high efficiency, and less energy consumption.

The flange-mounted Eclipse servo motor brake will fit externally, mounting directly between the servo motor (frequently metric) and industry standard NEMA outputs, such as gearboxes.

All models are available for servo motor frame sizes of two, three, four and five inches.

These brakes offer consistent long-lasting performance with virtually no maintenance needed.

Couplings suite marine applications

Renold Hi-Tec Couplings has been awarded a contract to supply high performance DCB 838.0 rubber in compression shaft couplings for marine propulsion systems to be installed in a fleet of anchor handling/tug supply vessels. The first of the vessels, the MV JP Laborde, is currently under construction at the Yantai Raffles Shipyard Company in China. The couplings are to be manufactured under ABS Survey and feature oil injection shaft mounting and a drop out feature, which allows access to the motor bearings without the need to move adjacent machinery.

To be operated by Tidewater Marine of New Orleans, each 86m long, dynamically positioned vessel is capable of a bollard pull of over 200t and the ability to handle anchors in depths in excess of 1530m.

The GPS control will keep the vessel constantly on station; the load on the coupling is reversible and highly dynamic.

Renold was awarded the contract by Karl Senner, which is responsible for supplying Reintjes DLG 4447U twin input/single output reduction gear for the five vessels.

The DCB couplings are to be installed in the drive train between each of the Amerimex electric motors and the reduction gearboxes, which in turn drive the azimuth reversible thrusters, which provide the propulsion.

With a maximum torque of 5520kNm, Renold DCB couplings are ideally suited for marine propulsion, power generation and reciprocating compressor applications where fail-safe operation, long life and the control of resonant torsional vibration are essential.

Other benefits derived from using Renold DCB couplings include a misalignment capability and severe shock load protection.

Andrew Broadbent, Sales Manager, Renold Hi-Tec Couplings comments: "Once again the specification of Renold DCB couplings for safety critical marine propulsion systems is fitting testimony to their reliability and fail-safe design principles, while they remain arguably the world's best coupling for noise attenuation and damping

Investment aims improve gearbox quality

Ondrives has once again invested in the latest CMM technology and horizontal machining centre to bring its production facilities to new levels. A Daewoo HC400 seven-pallet horizontal machining centre has been purchased to give greater flexibility to the current gearbox range as well as a Mitutoyo Crysta Apex C-574 co-ordinate measuring machine and accessories to give second-to-none accuracy. These new CMMs are capable of speeds up to 520mm/s with a resolution of 0.0001mm and offer improved accuracy specifications as well as faster movement.

They feature lightweight materials and an innovative machine structure to provide high travel stability and accuracy.

The main attraction of using a co-ordinate measuring machine is the precise nature with which it measures, which will enable Ondrives to control all its output to the highest standard.

One of the benefits of using this machinery is the ability to import 3D CAD models and pick out areas needed for measuring, from which the machine can easily be set up to measure dimensions relative to surfaces.

Parts can be measured with ease of set up and repeatability along with gear measurements down to 0.50 mod.

Ondrives P30 type input worm has been measured for accuracy using a small 0.3mm stylus to give gear measurements to DIN standards.

The company states the Mitutoyo Crysta Apex C-574 will be used to monitor standard gear and casing production to ensure quality is maintained, as well as venturing into new areas of design.

Thus expanding on current knowledge and experience, taking Ondrives forward in product development.

The Daewoo HC400 seven-pallet horizontal machining centre offers greater flexibility when machining casings from a horizontal perspective.

It means shorter downtimes and increased productivity, thereby reducing lead times to customers in the long run.

Not only can standard parts be machined in this way, but special designs to customer's requirements can also be quoted for dependant on quantities.

This all means Ondrives customers can look forward to receiving their best ever quality gearboxes and components.

Mechanical drive components at Interplas

Sister companies Ondrives and Rino Industries are exhibiting jointly at Interplas 2005. The two companies will share Stand 5400 in Hall 5 at the NEC, Birmingham between 4th and 6th October. They will be showing their usual portfolio of mechanical drive components which range from the ever popular gearboxes, couplings, linear motion parts and fasteners to bearings, springs, antivibration parts and various assorted accessories.

There will also be a range of new parts on show for the first time, these range from Rino's new lifting and lashing points, flexible step couplings, tubular connectors and high precision rod ends.

Ondrives offerings include the new Prem6 miniature 90-degree gearbox and motor combination to plain and headed jig bushes.

As ever, the newest edition catalogues and CD-Rom will be available to take away free of charge.

Couplings feature in cold rolling mill upgrade

Renold Gearflex couplings are playing their part in a major upgrade of Corus' tandem cold rolling mill at Port Talbot in South Wales, a project that will more than double the mill's power handling capability. The five-stand cold rolling mill currently produces up to 1Mt of strip steel a year, which is used in the fabrication of a wide range of items including car bodies and cases for domestic appliances. The upgrade is scheduled to take place in two stages with stage one already completed.

This involved the replacement of three 2.9MW DC motors with three new 6.9MW AC motors and associated gearboxes.

A Renold GF12HDB Gearflex coupling connects the motor to the gearbox.

Additional Renold Gearflex couplings consisting of GF16HDB, GF18HDB and GF20HDBs complete the package, connecting the gearbox output to the pinion box which drives the rollers through which the steel passes.

Commenting on the contract, Martin Slade, Renold Clutches and Couplings' Sales Director said: 'This was an important and prestige order for us to win'.

Motor range spans millions of options

Parvalux, the UK's leading manufacturer of small geared motors, believes in offering its customers a choice. In fact, when the options of motor type (AC or DC), power rating, torque, voltage, speed, type of fixing, shaft styles and dynamic brakes are taken into account, the result is over 100 million possible combinations. Take fixings for example, in addition to the standard foot mounting, there are also the options of flange, stud or spigot mounting, providing the design engineer with a wide range of methods of attaching motor to machine.

Mounting feet provide a robust and versatile method of attaching a motor or motor/gearbox to the back-plate of the machine.

This fixing method allows motors to be quickly attached and removed from a machine and the fixing feet allow small adjustments to be made to the motors position.

For applications where a suitable fixing surface is not available, customers can specify a spigot (face), flange or stud type fixing.

Flange fixing is common for worm type gearboxes and provides a strong fixing designed to cope with high torques.

The flange is pre-drilled and fully integrated into the body of the gearbox.

It provides a robust and compact method of fixing particularly in applications where space is at a premium.

Spigot mounting is the lowest cost option and provides tapped holes in the body of the motor or gearbox.

Various options are available for the position of the fixing holes and this method provides a compact means to directly mount the motor or gearbox to the machine.

Miniature motors suit all applications

For applications as diverse as medical equipment and robotics, security devices and instrumentation, EMS is now offering the extensive FTB range of high-performance low-profile miniature motors. The motors are available in direct drive versions with torque ratings from 0.05 to 3mNm, and in geared versions with ratings from 50 to 180mNm. All the new motors feature ironless rotors with three flat oval copper coils, which rotate in an axially oriented magnetic field, and which have very small moments of inertia.

This design allows high rates of acceleration to be achieved with minimal flutter, and provides complete freedom from cogging.

In addition, the linear characteristics of the motor make it easy to provide accurate speed control.

The low-profile construction of the motors, which vary in thickness from 5.2 to 8.2mm for direct drive types, and from 12 to 19.1mm for types with gearboxes, makes them an ideal choice for use in modern equipment, where minimum overall size is almost always a prime requirement.

All the motors in the range are available in versions to suit 3 and 6V supplies, with many models available to suit other voltages from 2 to 24V.

Recommend maximum operating speeds for direct drive motors are between 5500 and 10,000rev/min, depending on the motor size.

In addition to FTB motors with integral gearing, EMS also offers compatible spur gearheads for many of the motors in the range.

Service for oil and water coolers

ZF Industrial has been awarded the UK distributorship for Habor Oil and Water Coolers and offers a complete service covering supply of spares, complete systems and on and off-site repairs across the UK. The service aims to help customers with existing Habor coolers in CNC machining centres, grinders, broaching machines, lathes, milling and EDM machines reduce maintenance time and costs. Available with or without tanks, the oil coolers provide high levels of cooling capacity with low space requirements while the water coolers maintain the correct temperature of spindles and cutting surfaces without exhausts or tanks.

'The new distributorship deal with Habor is the logical progression for ZF Industrial as we increase our presence in the machine tool market', said ZF Technical Sales Engineer, David Morgan.

'We are well known for supplying gearboxes, brakes and clutches to UK industries and have continued to expand our offering to include the supply of custom high precision gearheads and oil coolers'.

'However, in response to the demands from our customers with existing Habor units fitted to their machines, we now supply both oil and water coolers backed up with extensive stocking of spare parts, a new system specification service, maintenance programme management as well as repairs both on and off site'.

The service from ZF fills a gap in the market where manufacturers may be aware that their current coolers are under performing, but spares, repairs or replacements may not be available in the time scales required to avoid significant impact on output.

With constant demands in manufacturing for increased output and improved accuracy, machinery is operating at higher speeds, making monitoring and controlling the resulting effects of heat on spindles and tools ever more important.

ZF has a range of five oil coolers, which includes the HBO Series units for hydraulic and lubrication oil that control the thermal expansion of spindles in CNC grinding, broaching, punching, woodworking machines and high-speed lathes.

By reducing heat deformation and maintaining spindle centre, the units ensure output quality and a longer service life for the machine.

Compact, easy to fit and available with or without tanks for flexibility, units can provide up to 15,000kcal/hr cooling capacity.

The range of oil coolers also includes the HK series for cooling cutting and grinding liquid in CNC machining centres, grinding machines and laser and cutting machines.

By avoiding increases in operating temperature, the coolers prevent deterioration of the liquid and their open coil design reduces the risk of blockages and potential damage.

The HE series is more for maintaining stability of the fluid in electro discharge machining systems, reducing wastage of the electrode and improving output quality while reducing pollution and risk of fire.

There are four models in the water cooler range providing up to 15,000kcal/hr cooling capacity with a choice fixed temperature control operation of 10 to 40C or differential temperature control of -10 to +10C.

New network to distribute geared motors

Lenze has signed up the first member of its new network of geared motor distributors - Transdrive Engineering Services of Oldham. These distributors will offer the StockGears range of Lenze geared motors in their local area, providing a fast and personal service to both users and small machine manufacturers. The StockGears range comprises four models of inline and right-angle geared motors covering the majority of industrial requirements up to 7.5kW.

Transdrive is an independent specialist distributor of drives, motors, gearboxes, clutches and brakes, and has traded for 23 years.

Along with high expertise in geared motors, the company offers 24-hour service, on-site technical support and cabinet building.

Its customers are mainly in the Greater Manchester area and the M62 corridor.

The StockGears range consists of helical, worm and bevel AC geared motors up to 7.5kW and available with fast delivery.

StockGears distributors will also be able to provide service on other requirements such as motors with integrated drive, ATEX motors and larger powers up to 45kW. Request free introductory details about products from Lenze....

Brook helps lubricant firm flow with seals range

Soverign Lubricants has changed its name to Sovereign Lubricants and Seals and has recruited a Sales Director with over 20 years experience in the industry. David Brook joined the company in February 2006 and has a technical background in providing products to solve sealing problems by designing seals and sealing systems bespoke to individual requirements. Brook is already speaking with the company's major clients to help them solve their sealing and lubrication problems.

The firm has for the past 26 years been the sole UK agent for the Omega range of lubricants.

Steve Chesters, MD of Sovereign Lubricants, said: 'The Omega range has enabled us to offer our customers real world solutions to their lubrication problems'.

'Not only has Omega reduced the customer's maintenance schedules by out-performing previous products, it also allows the typical maintenance manager more time to maintain other areas of plant because the product last that much longer'.

A typical example he said was the Omega 690 gear oil which adheres to the metal surface of the gears in a typical industrial gearbox.

'We have customers who have used this product for over 10 years and still have the original oil in the gearbox', he said.

'This is because it does not drain away or become contaminated like cheaper alternatives, particularly in the food industry where gearboxes are accustomed to being pressure washed thus allowing small amounts of water and moisture to enter into the gears which would in turn contaminate lesser gearbox oils'.

Because Omega 690 does not mix with water, any resulting contaminant can be drained off through the gearbox oil port.

As well as providing lubrication, as part of a continued expansion plan, the company has incorporated a range of seals and sealing products into its portfolio.

O rings, hydraulic seals and seal kits, rotating shaft seals, rubber and engineering plastic parts are available from the company.

'We visit a high proportion of our major clients every week'.

said Chesters.

'They always ask us for seals to accompany the greases and oils that they purchase from us'.

Heavy duty conveyor indexed by AC geared motor

Alumas, the Lancashire based supplier of modular and bespoke conveyor systems, has just installed a specially designed indexing roller conveyor, capable of holding and transferring up to 90t of press tooling. The end customer, Japanese and American owned Futaba-Tenneco of Burnley, is one of the UK's biggest suppliers of car components to the Japanese car manufacturers. This heavy-duty conveyor is indexed accurately and reliably with three Lenze AC geared motors.

Futaba-Tenneco supplies on a "just in time" basis, and so the ability to make rapid tool changes - several times a day - is of paramount importance.

Among the key requirements for the conveyor system was the ability to hold up to three complete tool assemblies, each of which can weigh up to 30t, and for these to be indexed along the conveyor as they are loaded and unloaded - in either direction.

The 16.5m-long roller conveyor is 2.3m wide and is driven by three Lenze geared motors.

A helical bevel design was chosen with a high service factor to suit the arduous duty.

The gearboxes contribute to the accuracy of indexing with high efficiency of 95% and low backlash of 7arc-min.

Despite a high output of more than 2600Nm at 7.5rev/min, the gearbox footprint is only 527 x 270mm.

Gary Howard, Futaba-Tenneco's Project Engineer, commented: "We are delighted with the conveyor, and in particular with the service received from Alumas.

The whole system was delivered on schedule, installed during the holidays and training given at 7.30am - between shifts, all with no loss of production.

In fact, we are so pleased that we are considering commissioning a second system which will return used press tools to the tool room".

Alumas, a member of the NIS Group of companies, specialises in modular belt, roller and assembly pallet conveyor systems.

They also supply a wide range of aluminium profiles and assembly elements, available either as individual components, or assembled into frame works, cabinets, guarding, panelling or workbenches.

The geared motors supplied by Lenze are part of the G-motion range which extend up to 45kW with five different gear configurations.

Modularity together with extensive UK stocks means that most requirements can be delivered in a few working days, or even, if required, next day.

Followers