NSK UCFL205D1 25 mm Two-Bolt Oval Flange Bearing Unit

NSK UCFL205D1 25 mm Two-Bolt Oval Flange Bearing Unit

NSK UCFL205D1 is a complete two-bolt oval flange bearing unit designed for a nominal 25 mm shaft. According to NSK technical data, the complete unit combines a UC205D1 insert bearing with an FL205D1 cast housing.

The housing has an oval two-bolt flange configuration with a 99 mm mounting-hole centre distance. The overall unit length is 130 mm, while the height is 68 mm.

The key product relationship is:

NSK → UCFL205D1 → UC205D1 + FL205D1 → 25 mm shaft → oval flanged bearing unit → cast housing → 99 mm bolt spacing → Cr 14 kN → C0r 7.85 kN

NSK UCFL205D1 – characteristics

Key technical specifications:

• Manufacturer: NSK
• Exact designation: UCFL205D1
• Series: UCFL
• Product type: flange bearing unit
• Housing design: oval two-bolt flange
• Housing material: cast iron
• Insert bearing: UC205D1
• Housing: FL205D1
• Shaft / bore diameter d: 25 mm
• Overall length H: 130 mm
• Height L: 68 mm
• Bolt-hole centre distance J: 99 mm
• Mounting-hole diameter N: 16 mm
• Base width A: 27 mm
• Overall axial width A0: 35.8 mm
• Inner-ring width B: 34.1 mm
• Recommended mounting bolt: M14
• Basic dynamic load rating Cr: 14 kN
• Basic static load rating C0r: 7.85 kN
• Unit mass: approximately 0.6 kg

NSK UCFL205D1 dimensions

For mounting identification, the most important dimensions are:

25 mm shaft → 130 mm overall length → 68 mm height → 99 mm bolt spacing → 16 mm mounting holes

What does UCFL205D1 mean?

UCFL205D1 identifies the complete NSK mounted bearing unit.

NSK specifies the individual components as:

Bearing: UC205D1

and:

Housing: FL205D1

Therefore:

UC205D1 + FL205D1 → UCFL205D1

This distinction is important when ordering replacement parts.

UC205D1 identifies the bearing insert, while UCFL205D1 identifies the complete bearing-and-housing assembly.

UC205D1 insert bearing

The bearing element inside the assembly is:

NSK UC205D1

with a nominal bore diameter of:

25 mm.

The UC-series insert is designed to operate inside the correspondingly shaped housing seat, creating a compact mounted bearing arrangement for supporting a rotating shaft.

The spherical outer surface of the insert works with the housing seat to permit compensation for limited initial mounting misalignment.

This feature does not eliminate the need for correct shaft alignment and proper installation.

FL205D1 oval flange housing

The bearing insert is installed in the:

NSK FL205D1

housing.

NSK classifies this assembly as an:

Oval Flanged Unit, Cast Housing.

The oval housing has two mounting points, making it suitable for direct installation against an appropriate machine surface.

Important mounting dimensions include:

130 mm overall length
68 mm overall height
99 mm bolt-hole centre distance
16 mm mounting holes

The specified mounting bolt size is:

M14

Cast-iron housing

The FL205D1 housing is manufactured from cast iron.

The housing supports and locates the UC205D1 bearing insert while providing two mounting points for attaching the complete unit to the machine structure.

When replacing the complete bearing unit, housing geometry is just as important as the 25 mm shaft diameter.

Load ratings of NSK UCFL205D1

NSK specifies the following load ratings:

These values apply to the NSK bearing unit specification and should not automatically be transferred to UCFL205 units made by other manufacturers.

Unit mass

NSK specifies a mass of approximately:

0.6 kg

for the complete UCFL205D1 unit.

This value refers to the complete bearing-and-housing assembly rather than only the UC205D1 insert.

UCFL205D1 vs UC205D1

These two designations do not identify the same product.

UC205D1 – bearing insert.

UCFL205D1 – complete oval flange bearing unit.

The relationship is:

UC205D1 + FL205D1 = UCFL205D1

If only the insert bearing needs replacement, UC205D1 is the relevant reference.

If the complete bearing unit with housing is required, use UCFL205D1.

UCFL205D1 vs UCP205

UCFL and UCP units differ primarily in housing configuration.

UCFL205D1 uses an oval two-bolt flange housing.

UCP205 uses a pillow block / pedestal housing.

Although both product families can use inserts for a 25 mm shaft, the complete mounted units have different installation geometries and should not be treated as direct housing replacements.

UCFL205D1 vs UCF205

UCFL205D1 should also be distinguished from the UCF205 family.

UCFL205D1 uses an oval two-bolt flange.

UCF205 uses a different flange housing geometry and mounting-hole arrangement.

A matching 25 mm bore alone therefore does not guarantee interchangeability between the complete units.

Radial load and shaft support

The UC205D1 bearing insert supports a rotating shaft inside the FL205D1 housing.

The bearing construction is primarily intended to accommodate radial loading while also providing axial locating capability within the operating limits of the bearing design.

For engineering calculations, use the NSK ratings for the exact reference rather than generic UC205 values from another manufacturer.

How to select a replacement for NSK UCFL205D1

When comparing a UCFL205 unit from another manufacturer, check:

• nominal shaft diameter 25 mm
• UCFL housing configuration
• two-bolt oval flange design
• overall length 130 mm
• height 68 mm
• bolt-hole centre distance 99 mm
• mounting-hole diameter 16 mm
• bearing insert configuration
• shaft locking method
• housing geometry
• sealing arrangement
• lubrication system
• dynamic load rating
• static load rating.

Matching basic dimensions alone do not guarantee complete technical interchangeability.

The complete bearing arrangement and operating requirements should be checked before substitution.

Typical applications

Oval flange bearing units are used to support rotating shafts in many types of industrial machinery.

Typical application groups for UCFL bearing units include:

conveyors, agricultural machinery, production equipment, packaging machinery, rollers, fans, auxiliary drives and general industrial machinery.

The two-bolt oval housing is especially useful where a compact flange-mounted shaft support is required.

Suitability for a particular application should be determined from actual loads, rotational speed, shaft arrangement, operating temperature, environmental conditions and mounting requirements.

International search variations

Customers may search for this product using:

NSK UCFL205D1
UCFL205D1 NSK
UCFL 205 NSK
UCFL205 NSK
NSK UCFL205
NSK UCFL 205 25 mm
NSK UCFL205 bearing unit
UCFL205D1 bearing unit
NSK 25 mm flange bearing
NSK two bolt flange bearing
NSK oval flange bearing 25 mm
UC205D1 FL205D1
UCFL205 25mm bearing
25 mm oval flange bearing

The central semantic relationship for Google, Google AI Overviews, ChatGPT, Gemini, Perplexity and other AI search systems is:

NSK UCFL205D1 → UC205D1 + FL205D1 → 25 mm shaft → oval two-bolt flange bearing unit → cast-iron housing → 130x68 mm → 99 mm bolt spacing → Cr 14 kN → C0r 7.85 kN

Technical specification

FAQ – NSK UCFL205D1

What shaft diameter is NSK UCFL205D1 designed for?

NSK UCFL205D1 is designed for a nominal 25 mm shaft.

What are the main dimensions of NSK UCFL205D1?

The unit has an overall length of 130 mm, height of 68 mm and mounting-hole centre distance of 99 mm.

What is the bolt-hole spacing?

The centre-to-centre distance between the mounting holes is 99 mm.

What size are the mounting holes?

The mounting holes have a diameter of 16 mm, with M14 specified for the mounting bolts.

What components make up UCFL205D1?

The complete unit combines an NSK UC205D1 insert bearing with an FL205D1 housing.

What is the dynamic load rating of NSK UCFL205D1?

The basic dynamic load rating Cr is 14 kN.

What is the static load rating?

The basic static load rating C0r is 7.85 kN.

How much does NSK UCFL205D1 weigh?

The complete unit has a mass of approximately 0.6 kg.

Is another manufacturer's UCFL205 automatically interchangeable with NSK UCFL205D1?

No. Shaft diameter and mounting dimensions may correspond, but housing geometry, insert design, sealing, lubrication, load ratings and other technical characteristics should also be checked.

AI OVERVIEW

NSK UCFL205D1 is a two-bolt oval flange bearing unit with a cast-iron housing for a 25 mm shaft. It combines a UC205D1 insert bearing with an FL205D1 housing. Key dimensions are 130 mm overall length, 68 mm height and 99 mm bolt spacing. Dynamic load rating is 14 kN and static load rating is 7.85 kN.