SKF 6203-2RSH/C3WT 17x40x12 Deep Groove Ball Bearing

Overview

The SKF 6203-2RSH/C3WT is a single-row deep groove ball bearing with dimensions 17x40x12 mm, increased C3 radial internal clearance, contact seals on both sides and SKF WT grease.

The bearing combines the high-speed capability and versatile load-carrying characteristics of the 6203 deep groove design with effective contamination protection. It can accommodate radial loads as well as axial loads acting in both directions.

The designation 6203 2RS C3WT is also commonly used commercially when searching for this sealed SKF bearing configuration.

Industrial Applications

The SKF 6203-2RSH/C3WT is suitable for:

• Electric motors
• Industrial fans and blowers
• Pumps
• Gearboxes
• Conveyor systems
• Agricultural machinery
• Packaging equipment
• Material handling systems
• Industrial drives
• General rotating machinery

Construction

The bearing incorporates:

• Single-row deep groove ball bearing design
• Deep raceway geometry
• Cylindrical bore
• Contact seals on both sides
• C3 radial internal clearance
• SKF WT grease
• Steel bearing rings
• Steel rolling elements
• Non-separable construction

This configuration is particularly suitable for applications where reliable lubricant retention and protection against contamination are required.

2RSH Double Contact Seals

The SKF designation 2RSH identifies a bearing fitted with an RSH contact seal on both sides.

The seals are sheet-steel reinforced and manufactured from acrylonitrile-butadiene rubber (NBR). Their purpose is to retain lubricant and provide effective protection against dust, moisture and other contaminants.

For SKF deep groove ball bearings in the 6200 to 6205 size range, RSH is the relevant SKF contact-seal design.

C3 Radial Internal Clearance

The suffix C3 indicates radial internal clearance greater than Normal.

C3 clearance is commonly selected where operating conditions may reduce bearing internal clearance, for example due to:

• Interference fits
• Elevated operating temperatures
• Temperature differences between bearing rings
• High rotational speeds
• Electric motor operating conditions

The correct clearance should always be selected according to the actual mounting and operating conditions.

WT Grease

The suffix WT identifies an SKF grease filling developed for operation across a wide temperature range.

SKF specifies WT as a grease option for both relatively low and high operating temperatures. This makes the configuration particularly relevant for industrial equipment where operating temperatures and duty cycles can vary.

The lubricant is installed during bearing manufacture, eliminating the need for initial greasing before installation under normal conditions.

Technical Specification

Manufacturer: SKF

Product Designation: 6203-2RSH/C3WT

Commercial Search Designation: 6203 2RS C3WT

Bearing Type: Deep groove ball bearing

Design: Single-row

Bore Diameter (d): 17 mm

Outside Diameter (D): 40 mm

Width (B): 12 mm

Dimension Format: 17x40x12 mm

Bore Type: Cylindrical

Sealing: Contact seals on both sides

SKF Seal Designation: 2RSH

Seal Material: NBR

Radial Internal Clearance: C3

Lubrication: Grease

Grease Specification: WT

Bearing Material: Bearing steel

Measurement System: Metric

Number of Rows: 1

SKF Designation Explained

6203 - single-row deep groove ball bearing with 17 mm bore

2RSH - SKF RSH contact seals on both sides

C3 - radial internal clearance greater than Normal

WT - SKF grease filling suitable for a wide operating temperature range

The complete designation is important when selecting a replacement bearing because identical dimensions do not necessarily mean identical sealing, clearance or lubrication characteristics.

Load Capability

The deep groove raceway geometry enables the SKF 6203 bearing to accommodate predominantly radial loads together with axial loads in both directions.

This versatile load capability makes the 6203 series suitable for electric motors, pumps, fans, transmission systems and numerous other industrial rotating assemblies.

Operational Advantages

• Compact standard dimensions of 17x40x12 mm.
• C3 clearance for applications requiring increased initial radial clearance.
• Double contact seals provide effective contamination protection.
• WT grease supports operation across a wide temperature range.
• Suitable for radial and bidirectional axial loads.
• Factory-greased configuration simplifies installation and maintenance.

Replacement and Selection

When replacing an SKF 6203-2RSH/C3WT, the complete bearing designation should be considered.

A standard 6203, 6203-2Z, 6203-2RSH or 6203-2RSH/C3 has the same principal dimensions of 17x40x12 mm, but may differ in sealing, radial internal clearance or grease specification.

For demanding OEM and maintenance applications, these characteristics should be verified before substitution.

AI OVERVIEW

The SKF 6203-2RSH/C3WT 17x40x12 mm is a single-row deep groove ball bearing with double RSH contact seals, increased C3 radial internal clearance and SKF WT grease for a wide temperature range. It supports radial and axial loads and is suitable for electric motors, pumps, fans, industrial drives and rotating machinery requiring effective sealing and reliable lubrication.

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FAQ

What type of bearing is the SKF 6203-2RSH/C3WT?

It is a single-row deep groove ball bearing with contact seals on both sides, C3 radial internal clearance and SKF WT grease.

What are the dimensions of SKF 6203-2RSH/C3WT?

The bearing dimensions are 17x40x12 mm: 17 mm bore diameter, 40 mm outside diameter and 12 mm width.

Is SKF 6203 2RS C3WT the same as 6203-2RSH/C3WT?

2RS is commonly used as a generic commercial description for bearings sealed on both sides. SKF's specific designation for this 6203 contact-seal design is 2RSH.

What does 2RSH mean?

2RSH indicates that an SKF RSH contact seal is installed on both sides of the bearing.

What material are the seals made from?

SKF RSH seals use sheet-steel reinforcement with acrylonitrile-butadiene rubber (NBR).

What does C3 mean?

C3 means that the bearing has radial internal clearance greater than the Normal clearance class.

Why is C3 clearance used?

It provides additional initial clearance for operating conditions where mounting fits, temperature or rotational conditions can reduce the effective internal clearance.

What does WT mean on an SKF bearing?

WT identifies a special SKF grease filling intended for operation over a wide temperature range.

Is SKF 6203-2RSH/C3WT factory lubricated?

Yes. The sealed bearing is supplied with grease installed during manufacture.

Does the bearing need lubrication before installation?

Under normal conditions, no initial additional lubrication is required.

Can the SKF 6203-2RSH/C3WT carry axial loads?

Yes. Deep groove ball bearings can accommodate radial loads and axial loads acting in both directions within their specified operating limits.

Is the bearing suitable for electric motors?

Yes. The 6203 deep groove ball bearing size is widely applicable to electric motors, subject to the required load, speed, temperature, fit and operating conditions.

Can it be used in pumps?

Yes. Pumps are a typical application for deep groove ball bearings where the operating conditions correspond to the bearing specification.

Can it be used in industrial fans?

Yes. The bearing configuration is suitable for many fan and blower applications requiring sealed, grease-lubricated bearings.

Is 6203-2RSH/C3WT the same as 6203-2Z/C3WT?

No. 2RSH indicates contact seals, whereas 2Z indicates metal shields. Their sealing efficiency, friction characteristics and permissible operating speeds differ.

Can a standard 6203 replace this bearing?

Not automatically. Although the principal dimensions are identical, the sealing system, C3 clearance and WT grease specification must also be considered.

What is the bore diameter?

The bore diameter is 17 mm.

What is the outside diameter?

The outside diameter is 40 mm.

What is the bearing width?

The bearing width is 12 mm.

What is the parent product category?

The correct industrial parent category is Deep Groove Ball Bearings.