boellhoff fasteners Germany boellhoff models boellhoff prices

boellhoff fasteners are installed in the shaft grooves or bore grooves of machines and equipment, preventing lateral movement of components on the shaft or in the bore. Fixation of shaft components is divided into axial fixation and circumferential fixation. Methods for axial fixation include: fixation using shaft shoulders or collars, fixation using end rings or conical surfaces, fixation using sleeves, fixation using round nuts, and fixation using elastic retaining rings. Retaining rings primarily serve for axial fixation; among these, fixation using a conical surface with a retaining ring offers high centering accuracy. The retaining ring of a rolling bearing acts as a movable flange to guide rollers, facilitating installation. Retaining ring structures include flat retaining rings, angled retaining rings, and center retaining rings. Fastener retaining rings are a type of mechanical component widely used for fastening connections. Various types of fastener retaining rings can be found on diverse machinery, instruments, meters, and supplies. They are characterized by a wide variety of specifications and a high degree of standardization, serialization, and generalization.

boellhoff fastener performance

Gears use shaft shoulders and retaining rings; pulleys are fixed using shaft shoulders and retaining rings. When using retaining rings for fixation, if the distance between shaft sections is large, round nuts may be used. The length of the shaft section where the component is installed should be made 2~5mm shorter than the hub width of the component to ensure that the sleeve, nut, and retaining ring press tightly against the end face of the shaft section. The purpose of circumferential fixation of shaft retaining rings is to transmit torque and prevent relative rotation between the component and the shaft. To improve the performance of rubber sealing products and prevent damage from extrusion under high pressure, some rubber sealing products (such as: O-rings, Y-rings, V-rings, drum-shaped rings, etc.) require additional retaining rings, support rings, and compression rings to enhance pressure resistance and ensure sealing performance. Materials mainly used for manufacturing sealing product retaining rings include polytetrafluoroethylene (PTFE), nylon, and polyoxymethylene (POM).

boellhoff fastener classification

Flat retaining ring: A separable, essentially flat washer whose inner or outer part serves as a shoulder for the outer or inner ring of a radial cylindrical roller bearing. Angled retaining ring: A separable ring with an "L"-shaped cross-section, whose outer part serves as an inner shoulder for radial roller bearings. Center retaining ring: A separable ring in double-row or multi-row roller bearings, used to separate and guide the rows of rollers. To ensure grinding precision across the entire shaft diameter, narrow shoulders parallel to the rolling direction and protruding from the raceway surface are used to support and guide rolling elements, keeping them within the bearing. Retaining rings include: taper pin locking retaining rings, screw locking retaining rings, screw locking retaining rings with locking washers, wire retaining rings, hole-type elastic retaining rings - Type A, hole-type elastic retaining rings - Type B, shaft-type elastic retaining rings - Type A, shaft-type elastic retaining rings - Type B, screw-fastened shaft end retaining rings, bolt-fastened shaft end retaining rings, hole-type wire retaining rings, shaft-type wire retaining rings, etc.

boellhoff fastener applications

The development of the mechanical industry has imposed higher requirements on fastening products. High-end fasteners (high-temperature, non-standard, titanium-plastic composite, special performance, etc.) are in short supply and still rely on imports. Retaining rings are applied in various machinery, equipment, vehicles, ships, railways, bridges, construction, structural assemblies, valves, instruments, various lock core components, needle roller bearings, pulleys, connectors, tools, and supplies, including quick couplings and other mechanical assemblies. Various types of fastener retaining rings can be seen everywhere. Therefore, some refer to fasteners covered by national standards as standard fasteners, or simply standard parts. Retaining rings can also position other components; their inherent elasticity facilitates assembly and disassembly, making them a widely used type of mechanical component for fastening connections.

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