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Large jaw couplings are now being offered for bore sizes up to 1-3/4” or 45 mm and torque capacities of 2,655 in-lbs (300 Nm). These new large jaw couplings are designed for use in precision systems with high deceleration and acceleration curves, such as those found in semiconductor, solar, conveyor, and warehouse automation applications.
Pre-assembled modular mounting systems are designed for adjustability across many mounting applications. Conveyor mounting systems emphasize strict parallel installation using a flange-bolt base and a conveyor rail guide. Sensor mounting systems offer flexibility in a mounting application with adjustable or 90-degree connectors, two-way bases, and various mounting brackets. Both systems include stainless steel rods (with or without scale) from 100mm to 300mm in length, zinc clamping levers, and connectors that allow adjustment of the rods’ position.
Mountable shaft collars with face holes are designed to mate directly with components such as sprockets, pulleys, and metallic plates. Ruland manufactures them with drilled holes for mounting flexibility or threaded holes for the most secure connection between the collar and mated component. They are offered in steel, aluminum, and 303 stainless steel in bore sizes ranging from 3/8” to 2” and 10mm to 50mm.
Jaw Couplings for Test, Measurement, and Inspection Applications
Ruland zero-backlash jaw couplings consist of two lightweight aluminum hubs and a center elastomeric element called the spider. Hubs press fit to an elastomeric element called the spider due to a proprietary curved jaw profile. The spider dampens impulse loads to minimize shock to the motor and other sensitive system components such as bearings. This is highly desirable in systems with high acceleration/deceleration curves often found in optical inspection and measurement equipment. High dampening reduces the time that these systems must pause between movements, known as settling time. The spider is available in three durometers allowing the designer to balance dampening capabilities with torque, misalignment and torsional stiffness based on the needs of the system. Zero-backlash jaw couplings are considered fail safe because the spider serves as the wear element – in the event of failure the jaws of the two hubs interlock for direct power transmission. The application can then be safely shut down for maintenance rather than stopping suddenly. Spiders can be replaced to restore the original performance characteristics of the coupling leading to reduced maintenance costs when compared to other coupling styles that require complete replacement when at the end of their usable life. Bores are available in sizes from 1/8” to 1-1/4” and 3mm to 32mm. The three piece design allows the user to mix and match clamp or set screw hubs with inch, metric, or keyless bores making it easier to tailor the coupling to specific system requirements. Ruland manufactures zero-backlash jaw couplings in our Marlborough, MA factory under strict controls using proprietary processes.
