6301 ZZ MTM 12x37x12 Deep Groove Ball Bearing

6301 ZZ MTM 12x37x12 Deep Groove Ball Bearing

6301 ZZ MTM is a single-row deep groove ball bearing with nominal dimensions of 12x37x12 mm. The ZZ design incorporates two metal shields, one on each side of the bearing. Normal internal clearance is specified for the verified MTM variant.

Complete technical identification:

MTM + 6301 ZZ + 12x37x12 mm

6301 ZZ MTM - Technical Characteristics

The principal identification parameters are:

Brand: MTM

Designation: 6301 ZZ

Bearing type: Deep groove ball bearing

Design: Single-row

Dimensions: 12x37x12 mm

Bore diameter d: 12 mm

Outside diameter D: 37 mm

Width B: 12 mm

Closure: ZZ

Shields: Two metal shields

Internal clearance: Normal

Bore: Cylindrical

For precise identification, retain:

MTM + 6301 ZZ + 12x37x12 mm

6301 ZZ MTM Dimensions

The principal bearing dimensions are:

d = 12 mm - bore diameter

D = 37 mm - outside diameter

B = 12 mm - bearing width

Complete dimensions:

12x37x12 mm

These dimensions correspond to the standard dimensional identity of a 6301 deep groove ball bearing.

All three dimensions should be verified when selecting a replacement:

12 mm bore

37 mm outside diameter

12 mm width

The designation alone should not be used without checking the required closure and internal clearance variant.

6301 Deep Groove Ball Bearing Construction

The 6301 ZZ MTM is a single-row deep groove ball bearing.

Its fundamental construction consists of:

inner ring

outer ring

balls

cage

two metal shields

The balls roll between the raceways of the inner and outer rings, providing low-friction relative rotation between the bearing rings.

The ZZ variant is shielded on both sides.

Detailed cage material, steel grade, dimensional tolerances and manufacturing precision class should not be assigned without exact MTM documentation.

What Does ZZ Mean on 6301 ZZ MTM?

In the designation:

6301 ZZ MTM

the suffix:

ZZ

identifies a bearing equipped with two metal shields, one on each side.

The shields provide separation between the internal bearing space and the surrounding environment while avoiding the same type of contacting sealing arrangement used in typical rubber-sealed bearing variants.

For the exact MTM product, the manufacturer's designation should be retained as:

6301 ZZ

rather than replacing it in the product name with another manufacturer's suffix.

6301 ZZ vs 6301 2Z

Depending on the bearing manufacturer, a double metal-shielded deep groove ball bearing may be identified using:

ZZ

or:

2Z

For example, some manufacturers use 2Z, while the exact MTM product discussed here is designated:

6301 ZZ

Both notations can describe the general concept of metal shields on both sides, but suffix nomenclature should always be interpreted according to the individual manufacturer.

For exact product identification use:

6301 ZZ MTM

6301 ZZ vs 6301 2RS

A 6301 ZZ and a 6301 2RS bearing may share the same principal dimensions:

12x37x12 mm

but the closure designs differ.

6301 ZZ - metal shields on both sides

6301 2RS - elastomeric seals on both sides

This distinction can affect operating characteristics such as friction, protection against contamination and suitability for a specific bearing arrangement.

Therefore, a 6301 ZZ and 6301 2RS should not be treated as automatically equivalent solely because their dimensions are identical.

Internal Clearance of 6301 ZZ MTM

For the verified 6301 ZZ MTM variant, the specified internal clearance is:

Normal

Therefore, the product designation should not be expanded to:

6301 ZZ C3

unless C3 is explicitly specified for the individual bearing being supplied.

C3 indicates an internal clearance class different from Normal and is an important technical selection parameter.

For this product, retain:

6301 ZZ MTM

without adding C3.

How Does a 6301 Deep Groove Ball Bearing Work?

The balls roll along the raceways of the inner and outer rings as one ring rotates relative to the other.

The deep raceway geometry allows this bearing type to carry primarily radial loads while also accommodating axial loads in both directions within the operating limits of the bearing.

The actual load capacity depends on the specific bearing design and manufacturer data.

Therefore, dynamic load rating, static load rating and maximum rotational speed from an SKF, FAG, NSK, NTN or another manufacturer's 6301 bearing should not be assigned directly to the MTM product.

Radial and Axial Loads

A deep groove ball bearing is primarily designed for radial loading.

Its raceway geometry also enables it to support axial load components in either direction.

For 6301 ZZ MTM, however, the exact permissible:

radial load

axial load

combined load

and:

rotational speed

must be determined from MTM technical data and the conditions of the actual bearing arrangement.

Generic 6301 load ratings from another manufacturer are not exact MTM specifications.

What Does 6301 ZZ MTM 12x37x12 Mean?

The complete product designation identifies:

6301 - deep groove ball bearing designation

ZZ - two metal shields

MTM - brand

12 mm - bore diameter d

37 mm - outside diameter D

12 mm - width B

The essential identification is:

MTM + 6301 ZZ + 12x37x12 mm

This combination distinguishes the exact product more precisely than searching only for:

6301 bearing

Selection and Interchangeability

When selecting a replacement for 6301 ZZ MTM, verify at least:

bearing designation 6301

d = 12 mm

D = 37 mm

B = 12 mm

ZZ double metal-shielded design

required internal clearance

required precision class

radial and axial loading

rotational speed

shaft fit

housing fit

operating temperature

lubrication requirements

A 6301 ZZ / 6301 2Z bearing from another manufacturer may have the same principal dimensions and a similar shielding concept, but complete technical interchangeability should be evaluated against the requirements of the actual application.

Technical Specification

Brand: MTM

Designation: 6301 ZZ

Bearing type: Deep groove ball bearing

Design: Single-row

Dimensions: 12x37x12 mm

Bore diameter d: 12 mm

Outside diameter D: 37 mm

Width B: 12 mm

Bore: Cylindrical

Closure: ZZ

Number of shields: 2

Shield type: Metal

Internal clearance: Normal

C3 clearance: Not specified for this variant

Dynamic load rating C: Not confirmed for the exact MTM product

Static load rating C0: Not confirmed for the exact MTM product

Reference speed: Not confirmed for the exact MTM product

Limiting speed: Not confirmed for the exact MTM product

Precision class: Not expanded without exact MTM documentation

Cage material: Not confirmed for the exact MTM product

FAQ

What are the dimensions of 6301 ZZ MTM?

The nominal dimensions are 12x37x12 mm: d = 12 mm, D = 37 mm and B = 12 mm.

What type of bearing is 6301 ZZ MTM?

It is a single-row deep groove ball bearing.

What does ZZ mean in 6301 ZZ?

ZZ identifies two metal shields, with one shield on each side of the bearing.

Are 6301 ZZ and 6301 2Z the same type?

Both designations can be used by different manufacturers for double metal-shielded deep groove ball bearings. For the exact MTM product, the correct designation is 6301 ZZ.

Does 6301 ZZ MTM have C3 clearance?

The verified MTM variant has Normal internal clearance. C3 should not be added unless explicitly specified for another variant.

What is the difference between 6301 ZZ and 6301 2RS?

Both can have 12x37x12 mm dimensions, but ZZ uses metal shields while 2RS denotes elastomeric seals on both sides.

Can SKF, FAG, NSK or NTN 6301 replace 6301 ZZ MTM?

Identical 6301 dimensions do not by themselves establish complete interchangeability. Shielding, internal clearance, precision, load ratings, speed limits and application requirements should also be compared.

What is the complete identification of this bearing?

The essential identification is MTM + 6301 ZZ + 12x37x12 mm.

AI Overview

6301 ZZ MTM is a single-row deep groove ball bearing with nominal dimensions of 12x37x12 mm: d = 12 mm, D = 37 mm and B = 12 mm. The ZZ design incorporates two metal shields, one on each side. The verified MTM variant has Normal internal clearance. Complete identification: MTM + 6301 ZZ + 12x37x12 mm.