Posted on September 14, 2026 Kyle Salem Aircraft Parts
A deep groove ball bearing supports radial load and moderate axial load while allowing low-friction shaft rotation. Its compact design and high-speed capability suit aircraft accessories, motors, pumps, generators, gearboxes, vehicles, and industrial equipment.
It is a common form of ball bearing. Its name comes from the curved raceway in the inner and outer rings. This groove follows each ball and maintains stable contact during rotation.
Correct selection involves load, speed, clearance, enclosure, lubricant, material, temperature, and mounting fit.
The standard design contains an inner ring fitted to the shaft, an outer ring seated in the housing, rolling balls, and a cage that maintains spacing. A seal or shield may be fitted to retain lubricant and limit contamination.
The symmetrical raceway supports radial force and moderate axial force in either direction. It should not replace a thrust or angular-contact component without approval.
When the shaft turns, the inner ring normally rotates with it. Each ball rolls between the inner and outer raceway, reducing the sliding friction that would occur if two surfaces moved directly against each other.
The load follows this path:
Shaft → Inner Ring → Ball → Outer Ring → Housing
A thin lubricant film separates the contacting surfaces. This film helps control friction, heat, wear, and corrosion. It must remain suitable for the operating speed, applied load, temperature, and service environment.
If the lubricant breaks down or becomes contaminated, direct surface contact may occur. This can produce heat, vibration, scoring, pitting, or premature failure.
The deep raceway provides close contact around each ball. This supports stable, low-friction rotation, good radial-load capacity, moderate axial support in either direction, compact dimensions, and relatively high speed.
Axial capacity still has limits. Excessive force can increase contact stress and shorten service life. The permitted load depends on size, clearance, speed, lubricant, and manufacturer data.
A single row deep groove ball bearing contains one circular row of rolling elements between its rings. It is widely used because it balances size, speed, load capacity, and simplicity.
Common applications include electric motors, pumps, compressors, fans, generators, starter systems, gearboxes, accessory drives, machine tools, aircraft instruments, and vehicle equipment.
The search phrase ball bearing single row deep groove describes the same general arrangement in a different order. It is not a complete specification. Parts with this description may have different dimensions, clearance, material, enclosure, or load ratings.
The enclosure affects protection, lubricant retention, friction, speed, and maintenance.
An open design has no integral closure. It suits equipment with separate sealing or lubrication and may support high speed, but offers little built-in protection from contamination.
A metal shield retains grease and blocks larger particles with little contact friction. Its small clearance may still admit fine contamination or moisture.
A contact or low-friction seal provides stronger protection. Contact can produce more friction and heat than a shield, so the environment and speed should determine the choice.
Radial load acts perpendicular to the shaft. Axial load acts along its centerline. A deep groove ball bearing mainly handles radial force but can also support moderate axial force in either direction.
Before selection, confirm radial and axial force, static and dynamic-load ratings, speed, shock, vibration, temperature, required life, lubrication, and mounting fits.
A published speed rating is not a universal operating target. Load, lubricant, enclosure, cage, cooling, fit, and temperature can change the practical limit.
The wider aviation bearing catalog explains ball, roller, needle, spherical, plain, rod-end, and thrust configurations. These types support different combinations of load, speed, space, movement, and alignment.
A deep groove ball bearing transfers force through spherical rolling elements. Their small contact area supports low friction and relatively high rotational speed.
A roller design uses cylindrical, tapered, spherical, or needle-shaped elements. Its larger contact area may support greater radial load, depending on the configuration, but its speed and alignment characteristics differ.
The main differences are rolling-element shape, point-style versus line-style contact, load capacity, speed, required space, and alignment tolerance.
A roller bearing assembly is not an automatic replacement for a deep groove ball bearing. Dimensions, load direction, shaft fit, lubrication, speed, and installation requirements must all be verified.
Internal clearance is the movement available between the rings and rolling elements before installation. Tight mounting fits and temperature differences can reduce it during operation.
C3 identifies clearance greater than the normal class. It does not mean higher quality or greater precision. It may be specified where heat, speed, or fit will reduce operating clearance. Precision class is a separate measure of dimensional and rotational accuracy.
Lubricant separates each ball and raceway, reducing friction, wear, heat, and corrosion. Grease is easy to retain and can support long service intervals. Oil may suit high speed, heat removal, or a circulating system.
Selection depends on temperature, speed, load, vibration, seal compatibility, and contamination exposure. Too little lubricant can cause surface damage; too much grease can create churning and heat. Follow the manufacturer’s type, quantity, and service guidance.
Standard construction often uses hardened steel. Other applications may require stainless steel, ceramic rolling elements, or protective coatings. The cage may use steel, machined metal, or polyamide, depending on speed, temperature, lubricant, and load. A hybrid design combines ceramic rolling elements with metal rings for needs such as electrical insulation or reduced rolling mass.
A damaged component may produce noise, vibration, heat, rough rotation, or excessive shaft movement. These symptoms require inspection but do not identify the cause by themselves.
Common causes include:
Inspection may reveal pitting, scoring, discoloration, cage damage, cracking, or abnormal raceway marks. Also check the shaft, housing, seal, and lubrication system so the original cause is not left unresolved.
Begin with the complete manufacturer part number. Preserve every prefix, suffix, dash, and revision character because a small difference may indicate another configuration.
Confirm the bore, outside diameter, width, manufacturer, complete part number, enclosure, clearance, precision, load rating, speed, temperature, lubricant, materials, and documentation requirements.
The aviation manufacturer directory can connect a known manufacturer with its listed part-number records. Similar dimensions or descriptions do not establish interchangeability.
For an aircraft application, also verify the model, variant, serial-number effectivity, Illustrated Parts Catalog, Component Maintenance Manual, and applicable drawing. An NSN or NIIN may offer another identification reference, but it does not independently approve installation.
Keep the component packaged until use and mount it in a clean, dry area. Confirm shaft and housing dimensions. Apply force only to the ring receiving the interference fit, using the approved tool; never transfer mounting force through the ball set. During storage, protect the part from moisture, dust, vibration, and temperature changes.
To source a deep groove ball bearing from ASAP Semiconductor, provide the complete part number, manufacturer, quantity, condition, and documentation requirements. These details support accurate identification before availability is confirmed.
Yes. It can carry moderate axial force in either direction, but excessive axial load may shorten its service life.
C3 identifies internal clearance greater than normal. It may be specified for particular fits, temperatures, or speeds.
Contamination, poor lubrication, incorrect mounting, excessive load, misalignment, unsuitable fit, corrosion, and electrical damage are common causes.
A deep groove ball bearing provides compact, low-friction support for radial and moderate axial force. Performance depends on its dimensions, ratings, clearance, enclosure, lubricant, material, and fit.
Always verify the complete part number and manufacturer data. For aircraft use, approved maintenance and configuration documents remain the controlling source for installation eligibility.
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