NKE 6207 2RS C3 35x72x17 Deep Groove Ball Bearing

What Is the NKE 6207 2RS C3 Bearing?

NKE 6207 2RS C3 is a single-row deep groove ball bearing with dimensions 35x72x17 mm, seals on both sides and C3 radial internal clearance. The 6207 size belongs to the NKE POP range of deep groove ball bearings. NKE lists the 6200-6212 series in open, sealed and shielded versions, with CN and C3 radial clearance groups.

Technical Specifications

Manufacturer: NKE

Designation: 6207 2RS C3

Bearing type: Deep groove ball bearing

Design: Single row

Bore diameter d: 35 mm

Outside diameter D: 72 mm

Width B: 17 mm

Dimensions: 35x72x17 mm

Bore: Cylindrical

Rolling elements: Balls

Sealing: Seals on both sides

Radial internal clearance: C3

Cage: Pressed steel in the standard NKE POP execution

Lubrication: Grease lubricated in sealed execution

What Does C3 Mean?

C3 indicates radial internal clearance greater than Normal (CN).

The increased initial clearance is important in applications where the operating clearance can decrease due to factors such as interference fits or temperature differences between the inner and outer rings.

NKE specifically lists CN and C3 as the radial clearance groups available for its POP range of single-row deep groove ball bearings.

C3 is an internal clearance specification. It does not indicate a higher bearing quality or precision class.

What Does 2RS Mean?

2RS is commonly used to identify a bearing equipped with seals on both sides.

NKE describes its POP sealed deep groove ball bearings as using a double-lip labyrinth seal design, developed to provide improved protection against contamination while maintaining low friction and good grease retention.

The sealed construction helps:

• retain grease inside the bearing,
• reduce contaminant ingress,
• protect the raceways and rolling elements,
• reduce maintenance requirements.

NKE POP Deep Groove Ball Bearing

NKE includes sizes 6200 through 6212 in its POP stock range of single-row deep groove ball bearings. The available configurations include open bearings, bearings with contacting seals and bearings with shields.

According to NKE, the POP range incorporates:

• optimized precision,
• improved raceway surface finish,
• close-grade balls,
• reduced running noise,
• 100 percent noise testing,
• optimized lubricant,
• improved protection against contamination in sealed versions.

NKE POP Lubrication

For its POP deep groove ball bearing range, NKE specifies a low-noise lubricant with:

NLGI class: 2-3

Typical operating temperature range: -40°C to +150°C

NKE describes the lubricant as suitable for a broad range of applications, with low noise characteristics and additional corrosion protection.

These are characteristics of the NKE POP range; actual permissible bearing operating temperature must also account for the complete bearing execution, seals, load, speed and application conditions.

Deep Groove Ball Bearing Design

The 6207 is a single-row deep groove ball bearing. This bearing design is one of the most widely used rolling bearing constructions because it combines a compact arrangement with low friction and versatile load capability.

Deep groove ball bearings primarily accommodate radial loads, while their raceway geometry also enables them to support axial loads in both directions.

6207 Bearing Dimensions

The principal mounting dimensions are:

Bore diameter: 35 mm

Outside diameter: 72 mm

Width: 17 mm

Therefore, the complete dimensional identification is:

35x72x17 mm

When selecting a replacement, these dimensions should be checked together with the sealing configuration and C3 internal clearance.

C3 vs Normal Clearance

A standard CN and C3 version of the 6207 bearing have the same principal dimensions of 35x72x17 mm, but they differ in radial internal clearance.

CN: Normal radial internal clearance

C3: Radial internal clearance greater than Normal

The C3 specification should therefore be preserved when the original machine or bearing arrangement requires increased clearance.

Typical Applications

Deep groove ball bearings of the 6207 size can be used in suitable:

• electric motors,
• pumps,
• fans and blowers,
• gearboxes,
• industrial drives,
• conveyors,
• agricultural machinery,
• production machinery,
• mechanical transmission systems,
• industrial equipment.

The final selection should account for load, rotational speed, operating temperature, shaft and housing fits and required internal clearance.

Selecting a Replacement for NKE 6207 2RS C3

For correct replacement identification, verify:

Manufacturer: NKE

Basic designation: 6207

Dimensions: 35x72x17 mm

Bearing type: Single-row deep groove ball bearing

Sealing: Both sides

Radial internal clearance: C3

Bore: Cylindrical

A standard 6207 bearing with Normal clearance should not automatically replace a 6207 C3, even though the mounting dimensions are identical.

FAQ - Technical Questions

What are the dimensions of NKE 6207 2RS C3?
The bearing has a 35 mm bore, 72 mm outside diameter and 17 mm width.

What type of bearing is NKE 6207?
It is a single-row deep groove ball bearing.

What does C3 mean in NKE 6207 C3?
C3 means that the bearing has radial internal clearance greater than Normal. NKE lists both CN and C3 clearance groups for its POP deep groove ball bearing range.

What does 2RS mean?
2RS identifies a version with seals on both sides. NKE's POP sealed bearings use a double-lip labyrinth sealing concept designed for contamination protection and grease retention.

Can a standard 6207 replace a 6207 C3?
Not automatically. The dimensions may be identical, but the internal clearance differs.

Frequently Asked Questions from Engineers and Maintenance Technicians

Is C3 better than Normal clearance?
No. C3 is simply a larger radial internal clearance class. The correct clearance depends on the bearing arrangement and operating conditions.

Does C3 change the dimensions of the bearing?
No. The principal dimensions remain 35x72x17 mm.

Is NKE 6207 2RS supplied lubricated?
Sealed deep groove ball bearings are grease lubricated. NKE specifies a low-noise NLGI 2-3 lubricant for its POP range.

What is the temperature range of the NKE POP lubricant?
NKE specifies a typical operating temperature range of -40°C to +150°C for the lubricant used in the POP range.

Is the 6207 size included in the NKE POP range?
Yes. NKE lists the 6200-6212 dimensional range, which includes 6207.