---
title: "Threaded Bushings: Applications, Polyurethane Comparison, and Material Selection"
description: "A detailed review of threaded bushings for industry: advantages of polyurethane, comparison with rubber and steel, tips for selection and ordering by drawing. Contact TIMOL!"
lang: "en"
date: "2026-11-05"
canonical_url: "https://timol.com.ua/en/statti/rizbova-vtulka-u-promyslovykh-zastosuvannyakh"
---
# Threaded Bushings: Applications, Polyurethane Comparison, and Material Selection

When another rubber or steel bushing wears out in just one season, equipment downtime and emergency repairs become regular issues. Switching to polyurethane threaded bushings can significantly increase the interval between replacements and reduce maintenance costs. In this article, we will examine the properties of polyurethane that determine its effectiveness in industrial assemblies, where threaded bushings are used, and how to choose and order the optimal product for your task.

## What is a Threaded Bushing and Where is it Used
A threaded bushing is a component used to secure, center, or protect threaded connections from wear, vibrations, and impact loads. It is an indispensable part in assemblies where moving and stationary elements are combined, such as in suspensions, support assemblies, or machine housings. In the mining industry, bushings are often installed in conveyor assemblies, in metallurgy, in rolling mill mechanisms, in railway transport, and in wagon suspension systems.

In the agricultural sector, threaded bushings are used in towing equipment and units to reduce wear on axles and joints. The oil and gas and chemical industries use bushings for sealing and protecting threaded connections in pumps and pipelines. Thanks to their versatility, these components are part of machinery, printing, food equipment, and even technological lines in the pulp and paper industry.

In most designs, the bushing acts as a shock absorber, damping micro-impacts, reducing vibration transmission, and extending the service life of threaded connections. Therefore, the correct choice of bushing material directly affects equipment lifespan and production downtime levels.

## Why Polyurethane Bushings are More Effective than Rubber or Steel
A polyurethane bushing lasts 10 times longer than a rubber one due to its unique combination of wear resistance, elasticity, and stability in a wide temperature range. In assemblies where rubber quickly wears out and steel transmits impacts and noise, polyurethane serves as an ideal compromise: it dampens vibrations, is not prone to aging, does not crack, and does not swell in water.

TIMOL polyurethane operates at temperatures from -60 to +100 °C, allowing these bushings to be used in outdoor technological lines, mines, elevators, and docks. The elastic structure of the material (rebound elasticity 35-65%) effectively absorbs impact loads, reducing metal fatigue in adjacent assembly parts. With a density of 1.05-1.25 g/cm3, polyurethane bushings are significantly lighter than steel, simplifying installation and reducing inertial loads on moving systems.

Unlike rubber, polyurethane does not degrade under the influence of lubricants and retains its properties even with prolonged exposure to aggressive environments. Metal bushings often experience corrosion, especially in wet or contaminated assemblies, whereas polyurethane does not rust and does not require additional anti-corrosion protection.

## Comparison of Materials for Threaded Bushings
To assess which material to choose for a specific assembly, let's look at a direct comparison of the main technical characteristics:

| Characteristic | TIMOL Polyurethane | SBR Rubber | Caprolon (PA6/66) | Carbon Steel |
|---------------------------------------|--------------------------|----------------------|----------------------|---------------------|
| Abrasion (DIN 53516), mm3 | 20-45 | 100-200 | 30-90 |, |
| Operating Temperature, °C | -60...+100 | -40...80 | -40...100 | -40...500 |
| Density, g/cm3 | 1.05-1.25 | 0.94-1.1 | 1.13-1.15 | 7.7-7.9 |
| Tensile Strength, MPa | 25-60 | 8-20 | 60-85 | 370-700 |
| Hardness | 50 Shore A - 70 Shore D | 40A - 80A | 75D - 85D | 120-250 HB |
| Rebound Elasticity, % | 35-65 | 30-55 | 5-15 |, |
| Wear Resistance to Rubber | 10 times higher |, |, |, |

In assemblies exposed to strong abrasives or impact loads, polyurethane demonstrates wear resistance 10 times higher than rubber (20-45 mm3 compared to 100-200 mm3 according to DIN 53516 for SBR rubber). Caprolon has a hardness of 75D-85D but low rebound elasticity (5-15%), making it vulnerable to brittle failure under high dynamic loads. Steel has significantly higher strength, but due to excessive weight and lack of vibration damping, it often leads to accelerated wear of adjacent parts.

> **Engineer’s Tip**: For bushings operating in assemblies with dynamic loads and abrasives, it is optimal to choose polyurethane with a hardness of 80-90 Shore A. This ensures a balance between elasticity and wear resistance. For securing bushings under thread, it is important to ensure quality preparation of the seating surface for reliable adhesion of polyurethane to the metal insert.

## Features of Manufacturing and Installing Polyurethane Threaded Bushings
The manufacturing of threaded bushings from polyurethane at the TIMOL plant is done by the free casting method, allowing for the creation of products of virtually any shape and size. This is particularly relevant for parts with complex geometry, internal and external threads, flanges, grooves, or slots for retaining rings. The ability to combine polyurethane with a metal insert ensures the strength of the threaded connection and ease of installation in assembly units.

The typical process involves preparing the tooling according to the drawing, pouring polyurethane, geometry control, and, if necessary, machining the seating surfaces. Internal metal elements, such as a threaded bushing, are fixed in the mold before pouring polyurethane, ensuring strong adhesion and reliable operation of the assembly.

The installation of a polyurethane bushing is standard: pressing into the housing, screw connection, or fixation with locking devices. With the correct selection of hardness and thickness of polyurethane, the bushing requires no additional maintenance for an extended period. In case of failure, the part is easily replaced, as manufacturing a new one according to the drawing does not require complex production preparation.

## Operational Advantages of Polyurethane Bushings
The main advantage of a polyurethane bushing is the combination of high elasticity and durability. In assemblies with vibrations, impacts, or abrasive wear, polyurethane not only protects the threaded connection but also extends the service life of adjacent parts. Rebound elasticity of 35-65% means that the material effectively absorbs impact energy without destroying its own structure. The bushing does not lose its mechanical properties in the temperature range from -60 to +100 °C, making it versatile for use outdoors, in seaports, elevators, or mining complexes.

Polyurethane does not undergo hydrolysis, does not crack in frost, does not absorb lubricants, and does not swell in water. This allows bushings to be used in assemblies with increased humidity, including in the food, paper, and agricultural industries. Unlike caprolon or steel, polyurethane dampens vibration and noise, positively affecting equipment operation comfort and reducing material fatigue in the assembly.

## Choosing the Hardness and Design of a Polyurethane Bushing
The correct choice of polyurethane hardness is a key factor in ensuring maximum wear resistance and durability of the bushing. For assemblies with dynamic loads and abrasives, polyurethane in the range of 80-90 Shore A should be selected: this material is hard enough to resist abrasion but still retains the necessary elasticity to absorb impacts. In assemblies with predominantly static loads or where minimal deformation is required, hardness up to 95 Shore A can be used.

The design of the bushing is determined by the assembly requirements: presence of flanges, grooves, combination with a metal insert or thread, additional sealing elements. Thanks to the free casting technology, the TIMOL plant can manufacture a product according to an individual drawing or sample, taking into account the specifics of the fit, operating conditions, and geometry requirements.

Before ordering, it is recommended to analyze the nature of the loads, the working environment (presence of abrasives, lubricants, moisture), and the type of installation. This will allow for the optimal selection of hardness, geometry, and method of securing the polyurethane bushing for maximum assembly resource.

## Economic Efficiency and Repairability of Polyurethane Bushings
Switching from rubber or steel bushings to polyurethane ones not only extends service life but also significantly reduces maintenance costs. With wear resistance 10 times higher than rubber, the number of replacements and line downtimes sharply decreases. In many assemblies, the polyurethane bushing becomes a "maintenance-free" component, requiring replacement only in case of force majeure damage, not due to planned wear.

If the assembly allows for quick bushing replacement, polyurethane is suitable for use in hard-to-reach places where equipment removal is costly. Repairability is ensured by the ability to manufacture any geometry according to the customer's drawing, and re-casting does not require complex tooling. The absence of corrosion and resistance to aging allow bushings to be left in reserve assemblies for a long time without losing properties.

## Selecting and Ordering a Polyurethane Bushing for the Task
You can select the optimal hardness and geometry of a polyurethane bushing for the specific operating mode of your assembly. For assemblies with strong abrasives or impact loads, 80-90 Shore A is recommended, for static loads, up to 95 Shore A. At the TIMOL plant, threaded bushings are manufactured according to the customer's drawing or sample, considering the specifics of the assembly and fit. Discuss execution details, agree on the material, and get a calculation by contacting the [catalog "Bushings, Rods, Rings"](/katalog) or directly with the plant engineers.

To order, simply provide a drawing, sketch, or sample of the part, a description of the operating conditions, and hardness preferences. All positions are manufactured by the free casting method, allowing for changes in the design even in small series or single products. Learn about the plant's capabilities in material selection and technology in the [reference information section](/informatsiya).

## How to Order a Consultation or Calculation
To get a consultation on material selection, dimension calculation, or ordering a threaded bushing by drawing, visit the [contacts page](/contacts). The TIMOL plant will help you choose a solution considering the specifics of the assembly, temperature regime, and type of load. The plant specialists will also advise on how to optimize the design for maximum part resource and minimize maintenance costs. Read more about polyurethane properties and application nuances in the [reference information section](/informatsiya).