Inverted Tooth Drives
Cross+Morse Inverted Tooth range provides the designer with high velocity, horsepower and efficiency drives with smooth transmission of load in a compact space.
‘HC’ Inverted Tooth Chain Drives
You get more with ‘HC’
The features of ‘HC’ link design, compensating pin and rocker joint, with the involute hobbed sprockets means HC chain can transmit more power, at higher speeds, in less space than other transmission media, with smooth action and minimum of noise.
High Speed Performance Operating chain speeds range from 10 to 35 metres per sec. with higher speeds (to 55m/sec) on special applications.
High Power in Narrow Widths HC chain transmits more power per inch of width than any other chain or belt drive, with capacities up to 6000 kW.
Smooth Quiet Operation The rolling action of the chain joints combined with smooth sprocket engagement minimise induced vibrations. This enables HC chain to provide quiet drives on high speed applications.
High Efficiency Smooth operation, with minimal frictional losses, provide transmission efficiencies up to 99.7%.
‘HC’ Chain – Selection
There are Seven good reasons to use HC in your design! HC transfer cases provide weight and cost savings because:
- Fewer Shaft and Bearings are required.
- Lighter Loads on Shaft Bearings.
- Chain Bearing Loads are compressive, placing case in compression, unlike gear forces which are tensile.
- HC Cases are Lighter as compressive loads mean thinner sections can be used.
- Centre Distance is less Critical and more flexible than required by gear and belt drives.
- Elasticity of HC Chain accommodates normal thermal expansion, and helps ‘cushion’ the drive.
- Simplified Design results in a positive cost saving.
SC Standard Inverted Tooth Chain Drives
The new series ‘SC’ chains suffer minimal wear elongation during operation, making them well suited to ‘fixed centre’ drive applications. The chains can also be used to replace other manufacturers chains on existing applications to increase power ratings. The ‘SC’ chains are available in standard Centre Guide construction, as shown in the following table; or with either Single or Double Outside Guides. Other widths and guiding arrangements from the standards shown can be supplied as replacements on existing drives on short lead time.
All Cross+Morse chains use the Pin and Rocker design developed in the ‘HC’ series chains, so eliminating friction and chordal action during articulation allowing the chains to be operated at speeds up to 35 metres/sec, with negligible wear or heat generation. Improved Link design combined with the ‘HC’ type pins has enabled higher loads to be transmitted, with the chains having twice the power capacity specified in the Standard. The improved Link design reduces stress concentrations giving improved fatigue life and increased tensile strength. Innovative stamping methods in link production maximise the bearing surface area of each link, reducing stress in the chain joint, and chain elongation when operating. All chain links are shot peened to improve fatigue resistance and provide a uniform finish.
HC/SC Sprockets
Cross+Morse can provide a full range of HV and SC Sprockets manufactured in the best combination of materials and heat treatment to ensure long service life with ability to transmit full designed torques and powers with minimum noise and vibration. Sprockets up to 30 teeth and below are usually manufactured from low carbon alloy steels with teeth carburised and sprockets hardened to provide maximum wear resistance with high core strength, larger sprockets are produced in medium carbon steel with induction hardened teeth, or meehanite castings. It is recommended that a minimum 25 tooth sprockets be used in all drives to provide best efficiency, smooth transmission and low noise levels, however, all sizes of chain can operate on sprockets down to 19 teeth, but such drive designs should always be referred to Cross+Morse. It is preferred practice to use sprockets with odd numbers of teeth, but for 1:1 ratio even teeth sprockets should always be used for optimum chain life and performance.