Needle roller thrust bearings feature cage & needle roller assemblies with a surface-hardened cage made of two precision-pressed steel plates. The rollers are retained securely in the cage to maintain smooth rotation even under large axial loads. These bearings are so small that they can easily replace conventional thrust washers in the same mounting space.

Bearinghousingtolerance

Shaft and housing fits are governed by the assembly’s specific operating requirements and conditions. The various factors to consider include the type and amount of load, operating temperature, running accuracy requirements, material composition and machining tolerances of mating components, and the size and type of bearing specified.

Drawn cup roller clutches are compact one-way clutches that feature a specially shaped outer ring. They are characterized by their light weight and high torque capacity relative to their small cross-sectional height. Drawn cup roller clutches provide accurate operation, low torque when over-running, and easy mounting. FCP/FCU Series are available for plastic housings.

Bearing shaft tolerancecalculator

Solid needle roller bearings provide maximum load capacity with high precision in compact spaces. Suitable across a range of operating conditions, these bearings feature rings made of carefully selected vacuum-degassed bearing steel or carburized steel and precision-ground, heat-treated rollers. Lightweight and extremely strong, the cage guides the rollers accurately and smoothly.

The specific recommendations for shaft and housing fits for metric series radial ball and roller bearings are covered under ABMA Standard 7. The standards do not apply to inch series bearings. Consult HiTech’s Applications Engineering department ;for assistance.

The following tables provide fit recommendations for a variety of operating conditions and load magnitudes. Table I specifies the load classification. Tables II and III specify standard shaft and housing tolerance classifications. Tables IV and V identify the specific fit tolerances for NHBB’s metric series ball and cylindrical roller bearings up to 12” O.D. For help with verifying the correct fit for your application, or to request a complete bearing optimization, please consult NHBB’s Applications Engineering department.

New Hampshire Ball Bearings, Inc. (NHBB) is a leading manufacturer of precision bearings and complex bearing assemblies for the global aerospace, defense, medical, and high technology markets. The company is a subsidiary of MinebeaMitsumi Inc. and an integral part of the global brand, MinebeaMitsumi Aerospace.

Bearinginterference fit chart

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Basic rating life calculation ; p, specific bearing load [N/mm2] (for values of p < 10 N/mm2 use p = 10 N/mm2) ; v, mean sliding velocity [m/s] ; f · factor ...

Bearingfittolerancechart

Thin cross section bearings, such as NHBB’s thin section and torque tube series, are inherently more sensitive to shaft and housing fits than metric ball and roller bearings. In most conditions a line-to-line-to-loose fit is more appropriate for thin cross sections. Heavier cross section bearings require tighter fits than light cross section bearings. In either case, extreme interference fits should only be used in conjunction with larger internal clearance in order to accommodate the subsequent loss of radial play.

Yoke-type track rollers (roller followers) have a thick-walled outer ring and crowned rollers that provide high load capacity to sustain shock loads. Each roller follower comes as an inseparable unit for easy handling suited for a wide range of applications, such as cams and rocker arms. Sealed types pre-filled with quality grease are also available.

Dimensions are in inches. For metric radial ball and roller bearings of tolerance classes ABEC 1 and RBEC 1.**Values relate to solid steel shafts only. Tighter fits may be needed for hollow or nonferrous shafts.*Select higher classification for greater accuracy (e.g., j5 for j6).

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Establishing accurate shaft and housing fits is critical to achieving the best possible bearing performance. Fits that are too loose or too tight can create conditions that lead to premature bearing failure. Under certain conditions, overly loose fits can lead to corrosion of the shaft or bore, excessive wear, poor bearing rotation, and excessive vibration and noise. Exceedingly tight fits may cause large mounting and dismounting forces, unwanted preload, overheating, and a reduction in radial play.

To determine whether a load is either light, normal, or heavy, divide an application’s equivalent radial load (Pr) by the bearing’s dynamic radial load rating (Cr). Compare the results with Table I. See page 44 for a definition and method for calculating equivalent radial load.

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SKFbearing shaft tolerancecalculator

For metric radial ball and roller bearings of tolerance classes ABEC 1 and RBEC 1.*Substitute lower classifications where wider tolerances are allowed.Please consult the factory. **Use F7 if temperature differential between inner and outer ring of a large bearing is greater than 10 ˚C.1Values relate to cast iron steel housings. Tighter fits may be needed for nonferrous alloys. 2The outer ring may either be tight or loose in the housing.

Bearing Part Number. Basic Bearing Number. Ring & Ball Material, Bearing Series, Size Ref. Details: Materials, -, -. DD, R-, 1560. No Code: SUJ2 or equivalent ...

Stud-type track rollers (cam followers) have a thick-walled outer ring, crowned rollers, and a stud with a hardened raceway surface for a tough structure that stands up to shock loads. The stud head is machined with screwdriver grooves and hexagonal holes for easy installation. Sealed types pre-filled with quality grease are also available.

Needle roller bearings (sometimes called “needle bearings”) use long and narrow cylindrical rollers that sometimes exceed JIS/ISO size ranges. They are categorized as thrust or radial bearings based on which load direction they support. Radial types include drawn-cup and solid types, as well as application-specific track rollers (cam and roller followers). Thrust needle and thrust roller bearings respond to axial load needs.

26.5 x 19.0mm Asymmetrical Narrow Freeform. Part number. 12586. Dimensions. 26.5 x 19.0mm. Drawing Number. 70084. Optic type. Freeform. Beam type. Asymmetrical ...

Bearing shaft tolerancechart

Cage & roller assemblies are easy-to-handle bearings that offer high load capacity despite their small size. A unique cage structure guides the needle rollers and allows for effective lubrication even at high speeds. Cage & roller assembles feature controlled contour crowning to reduce stress concentrations on the roller end from moderate misalignment/shaft bending, thereby extending bearing life.

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SKFbearingfit Calculator

Bearingfitstoshafts and housings PDF

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NSK drawn cup needle roller bearings feature a cage and full complement of rollers with a unique outer ring structure. These easy-to-mount bearings offer the thinnest outer ring of all rolling bearings along with high load capacity, high limiting speeds, and strong resistance to wear. Carefully selected alloyed steel allows for high maximum permissible loads, and surface-hardened cages help the bearings stand up to tough conditions.

Bearing Cross Reference Chart(sorted by ID, OD, HT) ... 99502H-RST .625". 1.375" .430". Bearing. 215-038 .625". 1.375" .500". Wheel ...

Different configurations are available, including standalone units, integrated raceway units, or units with different race thicknesses to match mounting conditions around the bearing.

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Generally speaking, the rotating ring of the bearing requires an interference fit with either the shaft or housing, and the nonrotating ring demands a slight loose fit with its mating component.