If you work with heavy machinery or industrial equipment, you’ve probably come across the need for a 4 Bolt Flange Bearing. These bearings are essential in many applications where stability and durability are key. If you're thinking about purchasing them, here's what you should know before making a decision.
Understanding 4 Bolt Flange Bearings
What is a 4 bolt flange bearing?: As the name suggests, these are bearings mounted within a flanged housing that uses four bolts to secure them in place. The design allows for smooth movement or alignment, accommodating the length of the shaft it supports.
What is the housing made of?: The housing can be made from a variety of materials, each with its own advantages. Cast iron is known for its strength and heat resistance, while pressed steel offers cost-effective durability. Plastic or thermoplastic materials like nylon and Teflon are lightweight and resistant to corrosion. Stainless steel is ideal for harsh environments due to its high resistance to chemicals and corrosion.
What are the bearings made of?: The material used in the bearing itself affects its performance. Aluminum is great for heat dissipation and load-bearing, often used in engines. Steel is strong and durable, especially when high carbon content is involved. Powdered-metal bearings are self-lubricating and cost-effective, though not ideal for extreme loads. Graphite-metal alloy bearings offer low friction and self-lubrication, while plastic bearings are ideal for applications where lubrication is difficult or unnecessary.
What are they used for?: These bearings are commonly used in rotary or linear motion systems where the mounting area is perpendicular to the shaft. They come in 2, 3, and 4 bolt configurations, with the 4-bolt version being preferred for heavier loads. When choosing, consider the shaft size and clearance requirements.
Performance skills to consider: Key factors include speed, bearing life, loads, and operating temperature. High-speed applications require careful selection to avoid failure. L10 rating indicates the expected lifespan at 90% reliability. Bearing loads refer to both radial and thrust forces, while engineering load considers external forces like belt tension and unbalanced weight.
Lubrication concerns: Most ball bearings require some form of lubrication—either manual or self-lubricating. Manual lubrication involves grease fittings or pumps, while self-lubricating bearings use materials like bronze or porous metals that retain oil naturally.
For more information on different types of bearings and their differences, check out the article "What's the Difference Between Bearings?" on Machine Design.
Whether you're looking to choose the right bearing for your application or have any other questions, feel free to reach out to us. We’re here to help!
