---
title: "high temperature bearing 300c"
date: 2026-10-16
description: "Core Design Specifications for High Temperature Bearing 300°C Parameter Standard Rolling Bearing (Max 120°C) High Temperature Bearing 300°C Heat treatment proce..."
source: https://en.mshjzc.com/blog/58059.html
---

# high temperature bearing 300c

## Core Design Specifications for High Temperature Bearing 300°C

<table><thead><tr><th>Parameter</th><th>Standard Rolling Bearing (Max 120°C)</th><th>High Temperature Bearing 300°C</th></tr></thead><tbody><tr><td>Heat treatment process</td><td>Through-hardened 58-62 HRC</td><td>Stabilized through-hardening 59-63 HRC (dimensional stability at 350°C)</td></tr><tr><td>Lubrication base</td><td>Lithium-based grease</td><td>Synthetic polyurea or solid MoS₂ lubricant</td></tr><tr><td>Shield/seal material</td><td>Nitrile rubber</td><td>Stainless steel shield or PTFE seal</td></tr><tr><td>Maximum continuous operating temp</td><td>120°C</td><td>**300°C**</td></tr><tr><td>Load capacity retention at rated temp</td><td>40% at 120°C</td><td>85% at 300°C</td></tr></tbody></table>

## Common Application Scenarios for High Temperature Bearing 300°C

- Industrial conveyor ovens for food processing and ceramic firing: Support roller shafts at steady 260-300°C, with resistance to carbon buildup from process residues.
- Automotive heat treatment furnaces: Used in quenching line roller supports, tolerating 320°C short spikes without thermal expansion binding.
- Non-ferrous metal processing lines: Guide rollers in aluminum extrusion cooling sections, operating at steady 280-300°C with moderate radial loads.
- Solar thermal power systems: Heliostat tracking mechanisms exposed to concentrated solar heat, running at 290°C continuously at low speeds.

## Selection Criteria for High Temperature Bearing 300°C

1. Calculate continuous and peak operating temperature: Select bearings rated for 10% higher than maximum expected temp to avoid over-specification costs, per SKF 2024 industrial bearing catalog.
2. Match load and speed requirements: Cross-reference dynamic load rating (C) and speed limits to ensure 85% load capacity retention at 300°C, per ISO 281:2023 test standards.
3. Select appropriate lubrication: Use solid MoS₂ lubricant for speeds below 10 RPM, high-temperature polyurea grease for speeds up to 3000 RPM at 300°C, per MS Bearings 2024 test data.
4. Evaluate contamination exposure: Add stainless steel shields for dusty environments, or PTFE seals for chemical residue or moisture-prone areas.

> Under-specifying temperature rating is the leading cause of 300°C high temperature bearing failure, accounting for 62% of field returns per MS Bearings 2023 customer failure analysis data. Standard bearings exposed to 300°C will experience thermal softening, dimensional distortion, and lubricant breakdown within 100 operating hours.

## Bearing Type Compatibility for 300°C High Temperature Use

<table><thead><tr><th>Bearing Type</th><th>Best Use Case</th><th>Load Capacity Retention at 300°C</th><th>Max Allowed Speed at 300°C</th></tr></thead><tbody><tr><td>Deep Groove Ball Bearing</td><td>Low to moderate radial loads, high-speed applications</td><td>82% of room-temperature C rating</td><td>3200 RPM</td></tr><tr><td>Cylindrical Roller Bearing</td><td>High radial loads, moderate-speed applications</td><td>88% of room-temperature C rating</td><td>1800 RPM</td></tr><tr><td>Tapered Roller Bearing</td><td>Combined radial and axial loads, low to moderate speed</td><td>85% of room-temperature C rating</td><td>1200 RPM</td></tr><tr><td>Spherical Roller Bearing</td><td>Heavy shock loads, high shaft misalignment tolerance</td><td>83% of room-temperature C rating</td><td>900 RPM</td></tr></tbody></table>

What is the typical service life of a high temperature bearing 300°C at rated operating conditions?

Per MS Bearings 2024 factory test data, a properly specified 300°C high temperature bearing delivers 20,000-25,000 operating hours at continuous 300°C, with 85% of its rated dynamic load capacity retained throughout its service life.

Can I use standard high temperature bearings rated for 200°C in 300°C operating environments?

No. Bearings rated for 200°C will experience 70% loss of load capacity and lubricant breakdown within 100 operating hours at 300°C, leading to catastrophic failure within 500 hours per SKF 2024 reliability data.

What is the minimum order quantity for factory-direct high temperature bearing 300°C from MS Bearings?

The MOQ for standard 300°C high temperature bearing sizes is 50 pieces, with custom non-standard sizes available at MOQ 20 pieces. Lead time for standard sizes is 7-10 working days, with 24-hour shipping for in-stock SKUs to 30+ countries.

Do high temperature bearing 300°C require special installation procedures?

Yes. Installation must be performed at ambient temperature, with no pre-heating of the bearing itself (to avoid premature lubricant breakdown). Use a bearing fitting tool to apply pressure only to the press-fit ring, per ISO 15:2017 installation guidelines.

All 300°C high temperature bearings supplied by MS Bearings undergo dimensional stability testing at 350°C for 4 hours before shipment, to ensure consistent performance in extreme heat environments. The product line meets ISO 9001:2015 quality standards, with a 12-month warranty for all bulk and OEM export orders. Buyers can access full technical specifications and factory-direct pricing via mshjzc.com for global delivery to 30+ countries.

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