Chainmill-HD-DrawingThe J&H Chain Mill Advantage

The purpose of all crushers are the same, to reduce oversized product to powder so that it can be recycled back into the production process.  There are many types of crushers available on the market for many different product types and industries.  It is important to look at the crusher that is correct for your product.  Except for the lump breaker, the basis of the J&H Crusher is the dual rotor chain mill for most applications, and in forty years, we have not swerved from this base.  Why?

Chain mills are simple machines.  The ability of the machine to function at full potential does not depend on the flatness of any surface, on the spacing of two rollers in rotation, or the amount of pressure applied.  The principle of the chain mill only relies on the laws of physics of impact.  For most friable materials, the efficiency is excellent because the physics works in our favor to produce a consistent discharge particle  size distribution largely independent of the particle size distribution at the feed.

Flat_DAPFor roller crushers, if there is any moisture content to the product, the product will not crush, but will flatten into little disk that are not easy to screen out.  This can significantly reduce the quality of your product.  Another disadvantage of the roller mill is that product clumps larger than a certain size will not easily pass into the rollers to get crushed, but may simply roll on top of the two rollers, blocking the product flow.  In a J&H Chain Mill, the larger clumps do not stand a chance against the high speed impact of a link of hard steel chain.  J&H Chain mills work in a large variety of applications and with a large range of product materials and product quality.

The chain mill is forgiving to normal wear and is relatively inexpensive to maintain in a like new condition, only needing to periodically replace links of chain or liner material.  Critical components such as the bearings and drive systems are exterior to the mill housing for convenient inspection and maintenance.  Development of our rubber impact pads have significantly reduced or eliminated material build-up on the interior of the chain mill housing and have extended the working life of the chain mill.  Full width side access doors and the open interior of our chain mills means that it is very easy to get access to all parts of the mill  for maintenance.  Chain link replacement can be performed with the rotors in place in the machines.  The open environment of the interior also means that foreign materials circulating in the product stream will pass through the mill with little notice while other machines that require the material to pass through narrow passages may become damaged or clogged.

J&H Chain mill rotors are dynamically balanced and our unique support system means that vibration of the chain mill housing is negligible for all normal operating conditions.  The machines are available in five different sizes and the compact footprint allows for the mills to be near each other for nearly any plant production capacity from 5 Tons per hour to over 600 Tons per hour per production line.

J&H has three categories of crushers.  Follow the links below for a closer look or return to J&H Products.

J&H Chain Mills

Chain mills use rotors loaded with chain links to pulverize the product material.  There are a several styles of chain mill that have been developed

HD – Standard Double Rotor Cantilever design for exceptional vibration control
HDS – Double Rotor Shafts supported on both sides by floating bearing supports for a more compact footprint.
HDF – Double Rotor Shaft supported by fixed bearing supports.

J&H Custom Mills

J&H has a line of custom mills for specific applications.  The are usually single rotor mills, either horizontal or vertical, but may also be modified dual rotor chain mills.  The impact surface may be chain links, hammers, or blades depending on the abrasiveness and hardness of the product material.

Lump Breakers

Heavy Duty Lump Breaker normally installed at the discharge of the granulator dryer to disintegrate large clumps of product before continuing onto the screening process.