Bearing Nomenclature

December 25, 2023 Post a Comment

Bearing nomenclature

A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions, running accuracy, and internal clearance.

What size is a 6203 bearing?

Bore diameter	17 mm
Outside diameter	40 mm
Width	12 mm

How is ball bearing nomenclature?

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 is Z and 2Z in bearing?

2 RS - Bearing with rubber seal on both sides. RS provides a better seal but more rolling friction than 2Z. RS - Bearing with rubber seal on one side, one side open. 2 Z / ZZ - Bearing with a metal seal on both sides. Z - Bearing with a metal seal on one side, one side open.

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 size is a 6200 bearing?

Bore diameter	10 mm
Outside diameter	30 mm
Width	9 mm

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 size is a 6205 bearing?

Bore diameter	25 mm
Outside diameter	52 mm
Width	15 mm

Why do we use 3 digits for bearings?

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 does LLB mean in bearings?

Non-contact type ZZ. Non-contact type LLB. Low torque type LLH. Contact type LLU.

What does E mean in SKF bearing?

SKF self-aligning ball bearings. Suffixes - Internal design. E. Optimized internal design for increased load carrying capacity.

What are the 3 rules of bearing?

There are 3 rules to follow when measuring a bearing: Always measure the angle in a clockwise direction. Always measure the angle from north. Always give a 3-figure bearing (E.g. 030° instead of 30°)

What is 2RS bearing?

The 2RS stands for 2 rubber seals. One on each side of the bearing. So the RS denotes only one side is sealed with a rubber seal and the other is exposed and not sealed. The rubber seal is simply a rubber coating placed over a metal cover to assist in preventing contaminates from entering the bearing.

What is ZZ type bearing?

Type ZZ - Non-removable, non-contact metal shield retained in the outer ring via crimping, or pressing. This type of shield cannot be removed once installed. This type of shield can also be manufactured from 300 series stainless steel.

What is C10 in bearing?

• Catalog Load Rating, C10: Constant radial load that causes 10% of a group of bearings to fail at the bearing manufacturer's. rating life. – Depends on type, geometry, accuracy of fabrication, and material of. bearing.

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.

What does 2rs C3 mean on a bearing?

Internal clearance being C3 means that the bearing has room for expansion if needed between the races of the bearing, whilst holding the outer ring and moving the inner ring in a radial movement you will detect a little amount of play between the two rings.

What is R4 bearing?

Deep Groove Ball Bearings R4 – 0.25X0. 625X0. 196mm Description. The R4 is a 0.25 mm Ball Bearing that can be used in many rotary and factory automation applications. The R4 Deep Groove Ball Bearings is an open style bearing.

What is CN in bearing?

CN is the “normal clearance” and is defined by DIN 620 and ISO 5753 and is used for bearings in normal operating conditions; C1 and C2 class bearing have radial clearances smaller than CN.