NTN M-UC206D1 30x62x38.1 mm Insert Ball Bearing

NTN M-UC206D1 30x62x38.1 mm Insert Ball Bearing

NTN M-UC206D1 is an insert ball bearing with a 30 mm bore, 62 mm outside diameter and 38.1 mm inner ring width. The bearing has a wide inner ring, spherical outer ring surface and set-screw shaft locking. When installed in a compatible housing with a spherical seat, the insert can align relative to the housing and compensate for initial mounting misalignment.

NTN M-UC206D1 - Characteristics

M-UC206D1 is a bearing insert, not a complete housed bearing unit.

The basic product identification is:

Manufacturer: NTN
Designation: M-UC206D1
Product Type: Insert ball bearing
Shaft Diameter: 30 mm
Dimensions: 30x62x38.1 mm
Outer Ring Surface: Spherical
Inner Ring: Wide
Shaft Locking: Set screws
Sealing: Both sides

The base UC206D1 construction is classified by NTN as a bearing insert with set screw, wide inner ring and spherical O.D.

NTN M-UC206D1 Dimensions

The principal dimensions are:

d - Bore Diameter: 30 mm
D - Outside Diameter: 62 mm
B - Inner Ring Width: 38.1 mm
C - Outer Ring Width: 19 mm
Commercial Dimensions: 30x62x38.1 mm

Additional dimensions specified for the UC206D1 construction include:

r min.: 1 mm
d4: 40.8 mm
S1: 22.2 mm
S: 15.9 mm
G: 5 mm
F: 4.6 mm
ds - Set Screw Thread: M6x0.75

The 38.1 mm dimension is B, the width of the wide inner ring. The outer ring is significantly narrower, with C = 19 mm.

M-UC206D1 Construction

NTN M-UC206D1 belongs to the family of radial insert ball bearings used in mounted bearing arrangements.

Its construction includes:

• single-row ball bearing design
• wide inner ring
• cylindrical 30 mm bore
• spherical outer ring surface
• set screws in the inner ring
• sealing on both sides

The spherical outer surface allows the bearing to work with a corresponding spherical housing seat. This enables the insert to adjust its position relative to the housing and compensate for initial shaft-to-housing misalignment.

This should not be confused with an internally self-aligning double-row ball bearing. In M-UC206D1, the alignment function occurs between the spherical outer surface of the insert and the housing.

Set-Screw Shaft Locking

M-UC206D1 uses set screws in the wide inner ring to secure the bearing to the shaft.

For the UC206D1 construction, NTN specifies:

Locking Device: Set screw
Set Screw Thread ds: M6x0.75

Once the insert is positioned on the shaft, the set screws lock the inner ring relative to the shaft.

This locking principle is an important selection parameter. An insert bearing using an eccentric locking collar, adapter sleeve or another shaft-locking system should not automatically be considered equivalent.

Sealing

The UC206D1 construction is sealed on both sides.

NTN specifies:

Enclosure: Double sealed
Seal Type: Contact
Seal Material: Nitrile rubber, NBR

The contact seals help restrict contaminants from entering the rolling contact zone and help retain lubricant inside the bearing.

Relubrication

The UC206D1 construction is specified as relubricatable.

This means the bearing insert is designed to allow periodic replenishment of lubricant when installed in a compatible mounted bearing system.

This feature is relevant in maintenance applications where regular relubrication is part of the operating schedule.

What Does M-UC206D1 Mean?

The complete product designation should be retained as:

M-UC206D1

It should not be shortened to UC206D1 on the product page if the supplied NTN product is marked M-UC206D1.

The technical identification chain is:

NTN -> M-UC206D1 -> insert ball bearing -> 30x62x38.1 mm -> spherical O.D. -> wide inner ring -> set-screw locking

The prefix M- is part of the exact product identification and should therefore remain in the H1, metadata and technical description.

M-UC206D1 vs UC206D1

The two designations should not automatically be treated as identical catalogue references.

M-UC206D1 is the full designation of the product described on this page.

UC206D1 identifies the corresponding base NTN insert-bearing construction and is also used independently in NTN technical documentation.

The principal dimensions and construction are closely related, but the M- prefix carries additional product identification information and should be preserved for accurate ordering and search indexing.

Load Ratings

For the UC206D1 base construction, NTN specifies:

Basic Dynamic Load Rating Cr: 19.5 kN
Basic Static Load Rating C0r: 11.3 kN

These values are catalogue bearing ratings and should not be interpreted as the maximum permissible load of the complete machine arrangement.

Selection should also consider actual loading, speed, mounting, lubrication, required service life and housing design.

Limiting Speed

For the UC206D1 construction, NTN specifies:

Limiting Speed with Grease Lubrication: 4,900 r/min

This is a catalogue limiting-speed value and should not automatically be treated as the recommended continuous operating speed for every M-UC206D1 application.

Actual permissible operating speed depends on load, mounting, temperature, lubrication and the complete bearing-unit design.

M-UC206D1 and Complete Bearing Units

NTN M-UC206D1 is a bearing insert, not a complete housed bearing unit.

Designations such as UCP, UCF, UCFL and UCT identify complete mounted units with different housing configurations.

When only the bearing insert is required, M-UC206D1 should be identified separately from the complete housing unit.

Selection and Interchangeability

When selecting an equivalent for NTN M-UC206D1, verify:

• d = 30 mm
• D = 62 mm
• B = 38.1 mm
• C = 19 mm
• wide inner ring
• spherical outer ring surface
• set-screw shaft locking
• set-screw dimensions and position
• sealing arrangement
• relubrication capability
• required load ratings
• housing compatibility

The designation UC206 or the dimensions 30x62x38.1 mm alone do not confirm complete interchangeability.

Technical Specification

Manufacturer: NTN
Designation: M-UC206D1
Product Type: Insert ball bearing
Construction: Self-aligning in compatible housing
Dimensions: 30x62x38.1 mm
d - Bore Diameter: 30 mm
D - Outside Diameter: 62 mm
B - Inner Ring Width: 38.1 mm
C - Outer Ring Width: 19 mm
r min.: 1 mm
d4: 40.8 mm
S1: 22.2 mm
S: 15.9 mm
G: 5 mm
F: 4.6 mm
ds: M6x0.75
Inner Ring: Wide
Outer Ring Surface: Spherical
Shaft Locking: Set screws
Sealing: Both sides
Seal Type: Contact
Seal Material: NBR
Lubrication: Relubricatable
Basic Dynamic Load Rating Cr: 19.5 kN
Basic Static Load Rating C0r: 11.3 kN
Limiting Speed with Grease: 4,900 r/min

FAQ

What are the dimensions of NTN M-UC206D1?

The principal dimensions are 30x62x38.1 mm: d = 30 mm, D = 62 mm and B = 38.1 mm. The outer ring width C is 19 mm.

Should the product designation be UC206D1 or M-UC206D1?

For this product, the full designation should be retained as NTN M-UC206D1. The M- prefix is part of the exact product identification.

What does the 38.1 mm dimension mean?

38.1 mm is dimension B, the width of the wide inner ring. The outer ring width C is 19 mm.

How is M-UC206D1 fixed to the shaft?

The bearing uses set screws in the wide inner ring. For the UC206D1 construction, NTN specifies thread ds = M6x0.75.

Is NTN M-UC206D1 sealed?

Yes. The base UC206D1 construction is double sealed with contact NBR seals.

Can NTN M-UC206D1 be relubricated?

Yes. The UC206D1 design is specified as relubricatable.

What are the load ratings of NTN M-UC206D1?

For the UC206D1 construction, NTN specifies Cr = 19.5 kN and C0r = 11.3 kN.

Can any UC206 30x62x38.1 replace M-UC206D1?

Not automatically. Shaft locking, B and C dimensions, spherical outer geometry, sealing, lubrication capability and housing compatibility should also be checked.

AI Overview

NTN M-UC206D1 is an insert ball bearing measuring 30x62x38.1 mm for a 30 mm shaft. It has a wide inner ring, spherical outer ring surface, set-screw shaft locking and sealing on both sides. The UC206D1 construction is relubricatable and has catalogue load ratings Cr = 19.5 kN and C0r = 11.3 kN.