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by Timken

Timken HM321210 Tapered Roller Bearing, Single Cup, Standard Tolerance, Straight Outside Diameter, Steel, Inch, 6.7500" Outside Diameter, 1.5000" Width

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Specifications for this item
Brand Name Timken
Part Number HM321210
Number of Items 1
Material Type Steel
Size 0.130" Max Housing Fillet Radius
Specification Met ABEC
System of Measurement Inch
UPC 053893594897
Bore Diameter N/A  inches
EAN 0053893594897
Item Weight 1 pounds
Load Capacity 18647.100  pounds
Manufacturer Series Number HM321200
National Stock Number 3110-01-315-4239
Outside Diameter 6.7500  inches
Overall Width 1.5000  inches
Shape Cup
Style Name Straight Outside Diameter
Tolerance Held Standard
UNSPSC Code 31171505

This Timken HM321210 single cup matches with a single cone (inner ring as... Read full product description

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Product Features

  • Single cup (outer ring) for connecting to cones (inner ring assemblies, sold separately) to form a complete single tapered roller bearing
  • Supports both radial and axial loads between a rotating and non-rotating member
  • Operating temperatures range from -54 to 120 degrees C (-65 to 250 degrees F)
  • High alloy steel for durability and heat tolerance
  • Open configuration for lubrication applied in place

Product Details

  • Item Weight: 1 pounds
  • Shipping Weight: 3.2 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B00460DHF0
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Product Description

This Timken HM321210 single cup matches with a single cone (inner ring assembly, sold separately) to assemble into a complete single tapered roller bearing, suitable for applications that support both radial and axial loads. This cup is matched to its cone assembly based on the load that the bearing needs to support, and if the bearing needs radial internal clearance to accommodate thermal expansion. Generally mounted in opposing pairs on a shaft to evenly distribute loads, this single tapered roller bearing assembly is stable in temperatures ranging from -54 to 120 degrees C (-65 to 250 degrees F). The single cup is made of Timken's high-alloy steel for durability, heat tolerance, and resistance to deformity under heavy loads. As part of a separable tapered roller bearing unit, this single cup has an open design that allows for lubrication and accurate adjustments. This single tapered roller bearing is for use in high-load, moderate-speed applications that include automotive axle systems and conveyor systems in heavy duty industries such as mining, construction and agriculture, among others.


Tapered roller bearings—Boundary dimensions and series designationsISO 355
Inch part numbering systemABMA standard 19.2
Width tolerance standardsISO 492
Tapered roller bearing naming conventionsISO 720

Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.

The Timken Company manufactures a variety of bearings, alloy steels, and related components and assemblies that meet International Organization for Standardization (ISO) standards for quality assurance. Founded in 1899, the Timken Company is based in Canton, Ohio.

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