thormas fasteners Germany thormas models thormas prices

thormas fasteners are designed to be installed in shaft grooves or bore grooves of machines and equipment, preventing lateral movement of components on the shaft or within the bore. Fixation of shaft-mounted components is categorized into axial fixation and circumferential fixation. Methods for axial fixation include: fixation via 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 axial fixation purposes; 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 shoulder to guide rollers, facilitating installation. Retaining ring structures include flat retaining rings, angled retaining rings, and centering 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.

thormas fastener performance

Gears utilize 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 employed. The length of the shaft section where the component is installed should be made 2~3mm shorter than the hub width of the component to ensure that the sleeve, nut, and retaining ring press tightly against the component's end face. 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 extrusion damage under high pressure, some rubber seals (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 commonly used for manufacturing sealing product retaining rings include polytetrafluoroethylene (PTFE), nylon, and polyoxymethylene (POM).

thormas 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 the inner shoulder for radial roller bearings. Centering 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. Types of 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, and shaft-type wire retaining rings.

thormas fastener applications

The development of the mechanical industry has imposed higher requirements on fastening products. High-end fasteners (high-temperature, special shapes, titanium-plastic composites, 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 observed. 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 class of mechanical components for fastening connections.

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