EZO 63801 2RS 12x21x7 mm - Thin-Section Deep Groove Ball Bearing

EZO 63801 2RS 12x21x7 mm - Thin-Section Deep Groove Ball Bearing

EZO 63801 2RS is a single-row deep groove ball bearing with a compact thin-section design, measuring 12x21x7 mm. It has a 12 mm bore, 21 mm outside diameter and 7 mm width. The 2RS version features contact seals on both sides. The bearing has Normal internal clearance CN and a steel cage guided by the rolling elements.

Technical data

EZO 63801 2RS dimensions

The basic dimensions are:

d: 12 mm
D: 21 mm
B: 7 mm

Complete dimensional specification:

12x21x7 mm

The relatively large 12 mm bore combined with a 21 mm outside diameter provides a compact radial cross-section, making this bearing suitable for arrangements where radial installation space is limited.

What does 63801 2RS mean?

63801 - identifies the bearing series and size with dimensions 12x21x7 mm.

2RS - contact seals on both sides of the bearing.

The complete designation 63801 2RS is important when selecting the bearing. The 2RS suffix should not be omitted because it defines the closure configuration.

EZO 63801 2RS construction

EZO 63801 2RS is a single-row deep groove ball bearing consisting of:

• inner ring,
• outer ring,
• balls,
• steel cage,
• contact seals on both sides.

The deep raceway geometry is primarily designed to accommodate radial loads. The bearing can also accommodate axial loads in both directions within the operating limits of the specific bearing arrangement.

Cage in EZO 63801 2RS

This version uses a:

steel cage, guided by the rolling elements.

The cage is an important construction feature. A bearing from another manufacturer with the same 63801 2RS size designation should not automatically be assumed to use an identical cage design.

Load ratings

The specified load ratings for EZO 63801 2RS are:

Dynamic load rating C: 1920 N
Static load rating C0: 1040 N

These values apply specifically to the EZO 63801 2RS bearing.

Speed ratings

The specified limiting speeds are:

Grease lubrication: 17000 min-1
Oil lubrication: 20000 min-1

Actual permissible operating speed may depend on load, lubrication, temperature, mounting accuracy and the conditions of the complete bearing arrangement.

63801 2RS vs 63801 ZZ

Both versions have the same basic dimensions of 12x21x7 mm, but differ in their closure design.

63801 2RS - contact seals on both sides.

63801 ZZ - metal shields on both sides.

The 2RS and ZZ versions therefore have different sealing and friction characteristics and should not be considered technically identical solely because their dimensions are the same.

Compact 12x21x7 mm design

The 63801 series provides a compact radial cross-section with a 12 mm bore, 21 mm outside diameter and 7 mm width.

This geometry is useful in bearing arrangements where installation space around the shaft is limited while a relatively large bore diameter is required.

Selection and interchangeability

Before selecting EZO 63801 2RS, verify:

• complete 63801 2RS designation,
• manufacturer EZO,
• dimensions 12x21x7 mm,
• 2RS sealing on both sides,
• internal clearance,
• cage design,
• required load capacity,
• operating speed,
• environmental conditions,
• shaft and housing fits.

Matching 12x21x7 mm dimensions alone does not guarantee complete interchangeability.

Installation and operation

The bearing, shaft and housing should be kept clean during installation.

When fitting the bearing onto a shaft, mounting force should be applied to the inner ring. When pressing it into a housing, force should be applied to the outer ring.

Mounting force should not be transmitted through the balls, and direct pressure on the 2RS seals should be avoided.

Alternative designations and reference formats

• EZO 63801 2RS
• 63801 2RS EZO
• EZO 63801-2RS
• 63801-2RS EZO
• 63801 2RS 12x21x7
• EZO 63801 2RS 12x21x7
• 63801-2RS 12x21x7

Both spaced and hyphenated forms may occur in searches and technical references.

FAQ - EZO 63801 2RS

What are the dimensions of EZO 63801 2RS?

The bearing measures 12x21x7 mm, with a 12 mm bore, 21 mm outside diameter and 7 mm width.

What type of bearing is EZO 63801 2RS?

It is a single-row deep groove ball bearing with a compact thin-section design.

What does 2RS mean?

2RS indicates contact seals on both sides of the bearing.

What cage does EZO 63801 2RS use?

It uses a steel cage guided by the rolling elements.

What internal clearance does EZO 63801 2RS have?

This version has CN, or Normal internal clearance.

What is the load rating of EZO 63801 2RS?

The dynamic load rating C is 1920 N, and the static load rating C0 is 1040 N.

What is the difference between 63801 2RS and 63801 ZZ?

63801 2RS has contact seals on both sides, while 63801 ZZ uses metal shields.

Can any 12x21x7 mm bearing replace EZO 63801 2RS?

Not automatically. The complete designation, sealing, internal clearance, cage design and required operating parameters should also be verified.

EZO 63801 2RS - key information

EZO 63801 2RS 12x21x7 mm is a single-row compact deep groove ball bearing with contact seals on both sides. It has Normal internal clearance CN and a steel cage guided by the rolling elements. Its dynamic load rating C is 1920 N and static load rating C0 is 1040 N.

Available from simmering.pl, a specialist supplier of bearings and industrial components. Stock in Poland with worldwide shipping.