Simply Bearings is pleased to offer a wide range of high-quality power transmission shaft couplings. These HRC coupling assembly units consist of two interlocking halves with a cushioning rubber or chloroprene compound insert between, with each half locking to its section of the shaft by means of a tapered locking bushing. These are available separately.
The modular construction facilitates easy assembly and maintenance while enabling the same HRC coupling assemblies to be adjusted to a variety of shaft diameters by choosing appropriate bushes.
Flanges can be bored with the bush-mounting tapered outwards - wide end innermost - so that bushes are fitted from inside the hub or tapered outwards for fitting from the outer side. The former is often called the hub mount or H type, and the latter face mount or F type. Additionally, instead of a finished tapered locking bush mounting, the flanges are available with just a pilot bore for machining according to the end user's requirements (B type).
The three different types can be used in combination with one another; in other words, one side can be an F type and still interlock with an H or B type on the other side, providing the dimensions - overall diameter - are compatible. Similarly, matched pairs combining an F or H type with a B type are available to allow for all possible standard and non-standard shaft and fitting methods and combinations.
Select an insert according to the operational conditions anticipated. Compounds derived from natural rubber are suitable for the majority of applications and provide excellent vibration and shock absorption, durability and wear protection. Check the product descriptions for the precise recommended temperature range, but ordinary rubber inserts are usually reliable between at least -17? and +70?C.
For applications in which fire hazards or other issues with static are significant, choose an assembly with a chloroprene compound insert instead. These are rated FRAS for their fire resistance and anti-static qualities.
If you are designing HRC coupling assemblies from scratch, pay attention to the full data sheets of each component. Rotational speed is one criterion. While larger diameter shafts and couplings are obviously stronger and more resistant to shock and wear for any given load, narrower diameter couplings are more suitable for high-speed applications.
Power rating charts for different configurations are available from the manufacturers, some of which are available to download from beneath the technical tab within the individual product descriptions. If you need any assistance with these calculations, Simply Bearings has trained personnel who are always happy to help.
For maximum power, performance and durability, the alignment of your shafts and HRC coupling assembly units is very important. The inserts provide a useful degree of play and compensation; however, in most cases, axial misalignment should never exceed one degree. Parallel displacement in linked shafts is minimised by the precision engineering of the coupling itself, with tolerances usually under one millimetre.