Davall Stock Gears has released a new series of right angle drives, a worm and worm-wheel gear speed reducer. The series comprises seven standard sizes of gearbox, with reduction ratios between 7:1 and 102:1, power ratings from 0.12 to 4kW, which can provide 15 to 850Nm output torque. The reduction ratios can be increased significantly when mounting two reducers together to provide up to 9792:1 in a combination unit.
The core product is based around a simple, sealed for life, modular design, comprising of an innovative two piece aluminium casing, vacuum impregnated (to seal and protect) with Resinol RT, ground and case hardened alloy steel worm and a bronze alloy wheel.
The high-speed input shaft is supported with two oversized bearings, ideal for frequent start or reversing applications, whilst the slower speed shaft has oversized bearings to accommodate maximum output bore (or shaft) diameters, and the housing is sealed using high temperature nitrile seals.
Critical exterior surfaces are precision machined to enable a variety of mounting accessories to be attached, for example, either an IEC or NEMA C flange motor adapter, output torque arm.
The series has been developed to provide as many additional engineering features as might be required to design a drive, without the necessary delay and expense of a custom gearbox.
The product range is suitable for use in all applications, and is also available on request, either certified to ATEX Category 2 and ATEX Category 3 or with stainless steel components for food environments.
Designed primarily for the European market, metric configuration, there is the unusual option of standard products focused toward the significant North American market, based around imperial dimensions.
After market service is available through a global network of distributors and agents.
The series has been developed to replicate the critical dimensions of other popular gearboxes currently available.
Two speed clutches feature on combination lathe
The effectiveness of ZF Industrial's two-speed products in providing improved performance from machine tools has been underlined recently with the adoption by Colchester, part of 600 Group, of ZF two speed clutches on what is claimed to be the world's most technically advanced combination lathe. The lathe is the new Combi K, which was unveiled for the first time at MACH 2000. Designed for manual, electronic and full CNC operation, the Combi K is a two-axis machine offering a host of innovative features, not least its unique 30 degree slant bed design, which puts an end to swarf debris accumulation and the damage that it can cause.
The design of the Combi K is a true synergy of ergonomics, technical innovation, flexibility and cost effectiveness.
The machine is modular in concept to allow for any size of bed length, and employs only high performance "lean turn" components in an integrated approach that allows cost compression.
One of the key components in this lean turn approach is ZF's gearless, self-contained two-speed clutch/pulley unit assembly, which in combination with a custom-developed, wide range, high performance motor offers a 20:1 constant power band.
"The ZF two speed clutch provides us with a convenient and inexpensive way of achieving a two speed machine with a wider spread of power and without the added cost and complexity of gears," say Colchester's Technical Director, Peter Cook.
"The system is more cost effective, quieter, more reliable, and certainly more time efficient for the operator as the time for changing speed ranges is considerably reduced.
"Colchester is the latest machine tool manufacturer to realise the cost and convenience benefits of our two speed products," commented ZF's Account Manager, Rob Pearson.
"The products are the ideal OEM component for modern machine tools.
They provide full power across the widest range of speeds, are compact and easy to install, are essentially maintenance free and remove the need to use large, and expensive, motors - and gearboxes."
"In addition to two speed clutches, the range also includes a two speed gearbox which is being used by many machine tool manufacturers across the world.
These are being increasingly adopted because they provide constant power across the speed range of a machine tool, right down to a common base speed of 375rpm.
This enables machine tool builders to standardise on their machine construction, and to reduce costs and build times, because the same mechanical arrangement can always to be used, irrespective of the maximum speed requirement.
The design of the Combi K is a true synergy of ergonomics, technical innovation, flexibility and cost effectiveness.
The machine is modular in concept to allow for any size of bed length, and employs only high performance "lean turn" components in an integrated approach that allows cost compression.
One of the key components in this lean turn approach is ZF's gearless, self-contained two-speed clutch/pulley unit assembly, which in combination with a custom-developed, wide range, high performance motor offers a 20:1 constant power band.
"The ZF two speed clutch provides us with a convenient and inexpensive way of achieving a two speed machine with a wider spread of power and without the added cost and complexity of gears," say Colchester's Technical Director, Peter Cook.
"The system is more cost effective, quieter, more reliable, and certainly more time efficient for the operator as the time for changing speed ranges is considerably reduced.
"Colchester is the latest machine tool manufacturer to realise the cost and convenience benefits of our two speed products," commented ZF's Account Manager, Rob Pearson.
"The products are the ideal OEM component for modern machine tools.
They provide full power across the widest range of speeds, are compact and easy to install, are essentially maintenance free and remove the need to use large, and expensive, motors - and gearboxes."
"In addition to two speed clutches, the range also includes a two speed gearbox which is being used by many machine tool manufacturers across the world.
These are being increasingly adopted because they provide constant power across the speed range of a machine tool, right down to a common base speed of 375rpm.
This enables machine tool builders to standardise on their machine construction, and to reduce costs and build times, because the same mechanical arrangement can always to be used, irrespective of the maximum speed requirement.
Range comprises 133 standard gear products
As its latest all-product catalogue confirms, Japan's leading manufacturer of gear products, KHK, continues to expand its range. This new publication introduces several new products and reinforces KHK's status as a comprehensive single source supplier. The full KHK product programme is supplied in the UK by sole distributor RA Rodriguez from whom the new KHK 3009 product guide and technical databook is also now available.
The 382-page book has been designed for easy reference and to complement the company's web-based catalogue.
The range now comprises 133 standard gear products and more than 4000 individual items.
Several new additions appear in this issue including an expanded range of racks, three types of bevel gearboxes and a new K-clamp for spur gears.
The 382-page book has been designed for easy reference and to complement the company's web-based catalogue.
The range now comprises 133 standard gear products and more than 4000 individual items.
Several new additions appear in this issue including an expanded range of racks, three types of bevel gearboxes and a new K-clamp for spur gears.
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