Engineered Mounted Bearings and Accessories for Mission Critical Industrial Applications
High-quality, precision engineered industrial products
Standard Locknut has been a premier American manufacturer and supplier of mounted bearings, flange cartridges, bearing and accessories for more than 75 years.
All our products are Made in the USA and designed to perform to the tightest specifications under virtually any operating condition for years to come. Our many satisfied customers know they can count on Standard Locknut to deliver high-quality products on time, every time.
Learn about all our precision engineered industrial products.
SAF – Mounted Split Spherical Roller Pillowblock Bearing
S2000 SLN-I Mounted Spherical Roller Bearings
Our S2000 line is a proven, robust, and highly reliable line of double row, spherical roller bearings. These bearings come in cast-iron housing with solid cast feet for durability and reliability in harsh environments.
They are engineered to be ready to go out-of-the-box and pre-lubricated with engineered approved grease and come standard with our ΔTriple Seal protection, making them versatile for both expansion and non-expansion installation.

MMW – Miether Mounted Solid Pillowblock Bearing

FCL – Miether Mounted Flange Cartridge Bearing

Type E SLN-I Mounted Tapered Roller Bearings
The Standard Locknut Type E mounted roller bearings are designed for the most demanding industrial applications. They are ready to go out of the box and pre-lubricated with engineered approved grease.
Cast iron housing and solid bases provide durability in the most demanding environments while high-quality manufacturing standards: lower maintenance costs and optimize performance.

Bearings
One of the most common forms of machine components, bearings reduce friction and allow for smoother rotation while transferring loads between machine components.
Bearings constrain relative motion to only desired motion and reduce friction between multiple moving parts. This is a critical function as bearings ensure the efficiency and longevity of industrial equipment across a broad range of industries.
The industrial bearings industry features a wide range of bearing types and designs all engineered for specific end use applications. By providing high precision and low friction, roller bearings allow high rotational speeds with less noise, heat and energy consumption.
Standard Locknut offers a complete line of spherical roller bearings for our bearing housings in both cylindrical and tapered bore series.
Adapter Assemblies
Adapter sleeves and assemblies are commonly used for locating bearings with a tapered bore onto a cylindrical shaft/seat. They are typically made of steel or other strong materials and are often used in conjunction with rotating machines, conveyor systems, motors, and pumps.
Our adapter sleeves and assemblies are designed for easy installation and removal with plain or stepped shafts and can accommodate tapered bore roller bearings in a wide range of sizes.
Locknuts
Locknuts are self-locking nuts often used to prevent vibration and torque from loosening a bolted joint or other component. They are available in a wide range of design configurations and used in a myriad of industrial equipment applications.
They are specifically engineered to resist loosening when subject to vibration, torque, and other mechanical operating conditions.
Standard Locknut offers a broad range of high quality, precision fabricated locknuts that provide positive locking in a wide variety of industrial applications, as well as applications requiring limited space.
Lockwashers
Lockwashers prevent loosening of fasteners due to vibration, temperature change, and other external forces.
They are utilized in almost every industry as mechanical fasteners to help secure bolts, nuts and screws in place when there are heavy vibrations or dynamic loads. Our precision-engineered lockwashers are unique designed for applications that require installation accuracy.
Withdrawal Sleeves
Withdrawal sleeves are critical to the mounting and dismounting of bearings onto the cylindrical seat of stepped shafts. Withdrawal sleeves provide a reliable, damage-free way to dismantle bearings without compromising the integrity of the shaft component.
They simplify maintenance procedures and allow for easy replacement or repair of bearings and bearing assemblies. Withdrawal sleeves can be made of steel, carbon steel, stainless steel, and ally steel.
Standard Locknut withdrawal sleeves feature a standard design for various application purposes, which makes them easy to install at any position on a straight shaft.
Hydraulic Adapters and Withdrawal Sleeves
Hydraulic adapters connect different types of hydraulic cylinders, fittings, tubes, and hoses.
When paired with withdrawal sleeves, they are used to mount bearings with tapered bores on to the cylindrical seat of stepped shafts to facilitate easy removal of the bearing with a removal nut.
High quality hydraulic adapters should operate efficiently in high pressure environments and provide corrosion resistance thereby enhancing system efficiency while reducing downtime.
Standard Locknut offers a full range of engineered, high-quality hydraulic adapters and withdrawal sleeves make installing and removing bearings easier by virtue of the oil grooves in the tapered outside surface and pump connections for oil injections.
Seals and Caps
Seals are critical for bearing longevity while caps allow housings to properly fit into the grooves of seals. These important industrial components help retain lubrication and keep bearing systems free from unwanted dirt and other materials that can impede performance over time.
Seals and caps must be designed and manufactured to meet standard industry requirements, along with the harsh demands of the most extreme environments. Our seals and caps are available in a wide range of series to match the demands of the application.
Standard Locknut products are built to last, maximizing return on your bearing-related investments and reducing costly production downtime. Our products will perform in the field as intended for years to come and we’re here for you when you need us.