Bearing Terminology

April 21, 2024 Post a Comment

Bearing terminology

Bearings typically consist of the following components: Two rings, inner and outer, with raceways. Rolling elements - rollers or balls. A cage which keeps the rolling elements spearted and helps guide motion.

What do the letters mean on a bearing?

The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.

What are the three parts of bearings?

Bearings use “balls” or “rollers” Bearings consist of three parts: the inner ring, outer ring, and balls.

What size is a 6203 bearing?

Bore diameter	17 mm
Outside diameter	40 mm
Width	12 mm

What are the balls in bearings called?

The most common of these is a roller bearing. Also a misnomer is when people refer to the balls in bearings as ball bearings. The balls are just a component of a ball bearing, which may also contain an outer race, an inner race and a retainer (cage).

How are bearings classified?

Bearings are divided into two basic categories: (1) rolling element or "anti-friction" bearings, (2) sliding surface or "plain" bearings.

What is C1 C2 C3 in bearing?

These are the 5 most common C codes for internal bearing play: C1, C2, C3, C4 and C5. If a bearing has a C code, it offers extra internal clearance. C1 offers the least extra clearance, C5 offers the most extra clearance. The extra margin C3 offer is considered 'normal'.

What is C3 and C4 in bearing?

The "C" rating stands for the clearance between the rings and rollers of the bearing. The greater the temperature variations the higher the C rating would be needed. C3 or C4 won't make much difference for a high rpm engine. However C4 would be preferable for a high-load engine.

What does ZZ stand for on a bearing?

2 Z / ZZ - Bearing with a metal seal on both sides. Z - Bearing with a metal seal on one side, one side open. E - Reinforced Design.

What is ID and OD of bearing?

Measuring your bearing: Most bearings are measured in three ways, the inside diameter or (ID), the outside diameter or (OD) and the width or (W). It is important to note that our bearing measurements are all done in the following order: Inside diameter (ID) x Outside diameter (OD) x Width (W).

What does 608 mean for bearings?

The "608" means that the bearings are from the 600 series, with a 8mm inner diameter (the width of the hole, i.e., internal bore).

What size is a 6200 bearing?

Bore diameter	10 mm
Outside diameter	30 mm
Width	9 mm

What is the inside of a bearing called?

The bearing ring on the inside, into which the shaft is inserted, is called the inner ring. The one on the outside is called the outer ring, and is inserted into the housing* (as seen in Figure 3). "Housing" refers to the components which come in contact with the outer ring when the bearing is inserted.

What are the two basic types of bearings called?

Bearings come in two main types: thrust bearings (which maintain a round object's rotation and position while thrust is applied, like in a Lazy Susan), and radial load bearings (keep a spinning object in position in the radial direction, like in a skateboard wheel).

What are the three 3 commonly types of wheel bearings?

The most popular types of bearings are ball bearings, Tapered Roller Bearings, Ball Thrust Bearings, and Roller Thrust Bearings etc.

Why do bearings have 3 digits?

known point. A bearing is a direction, expressed as a three-figure number. Bearings are measured clockwise from north. Bearings are always given as three figures because if you only wrote down 35°, it could easily be mistaken for 350°.

What are bearing properties?

Selection of bearing materials

Corrosion resistance.
Seizure resistance.
Fatigue resistance.
Embeddability.
Conformability.
Porosity.
Friction coefficient.
Thermal expansion coefficient.

What is life of bearing?

Bearing life is essentially the length of time a bearing can be expected to perform as required in predefined operating conditions. It is based primarily on the probable number of rotations a bearing can complete before it starts showing symptoms of fatigue, such as spalling or cracking due to stress. Ref: TI/E/0102.

What does C3 mean in SKF bearing?

The C3 in the product name means that this bearing has a higher (internal) clearance than normal. The C3 clearance is most frequently used for this type of bearings. The extra internal clearance allows expansion due to high speeds or temperatures. About SKF.