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Insert Bearings & Housed Units · Flange Units (UCF / UCFL / UCFC)

UCFC200 Series Round Flange Units

9 catalogued sizes, dimensioned to ISO 3228 / JIS B 1559. Pick any row and the technical drawing redraws to it.

UCFC200 Series Round Flange Units to ISO 3228 / JIS B 1559 are catalogued in bore 20-60 mm. 9 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
ISO 3228 / JIS B 1559
Bore
20-60 mm
Catalogued sizes
9

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

UCFC200 Series Round Flange Units technical product image

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the designation snaps the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quotation for UCFC200 Series Round Flange Units

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (ISO 3228 / JIS B 1559)

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

DesignationShaft bore d (mm)Insert bearingHousing material
UCFC20420UC204Grey cast iron
UCFC20525UC205Grey cast iron
UCFC20630UC206Grey cast iron
UCFC20735UC207Grey cast iron
UCFC20840UC208Grey cast iron
UCFC20945UC209Grey cast iron
UCFC21050UC210Grey cast iron
UCFC21155UC211Grey cast iron
UCFC21260UC212Grey cast iron

UCFC200 Series Round Flange Units conform to ISO 3228 / JIS B 1559, which fixes their boundary dimensions. As insert bearings & housed units, they are specified by designation plus three things the designation does not carry: internal clearance, seal type and cage material. All three are covered below.

What Are UCFC200 Series Round Flange Units?

UCFC200 Series Round Flange Units are insert bearings & housed units defined by ISO 3228 / JIS B 1559. They are selected by bearing designation and the dimensional characteristics shown below. Material, cage and sealing are specified separately from the designation and are covered further down this page.

Materials & Cage

The insert bearing is through-hardened GCr15 / 100Cr6 with a spherical outer ring. The housing is a separate material decision: grey cast iron for general industrial duty, ductile iron where shock is expected, pressed steel for light duty and low mass, thermoplastic or 304 stainless for washdown and food service. Seals are normally nitrile; specify FKM above 100 degrees C.

Typical Applications

Conveyors, agricultural equipment, fans and general OEM machinery, bolted straight to a frame with no machined housing bore.

Pricing

UCFC200 Series Round Flange Units are supplied to order. Pricing starts from approximately US$8.00 per piece for standard shaft sizes with a grey cast iron housing and setscrew locking; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

Inside the plant

Manufactured in our own plant

This bearing is forged, hardened, ground, superfinished and clearance-set in-house. The stages below are where its tolerance class, its internal clearance and its noise grade are actually decided.

  1. Bearing ring blanks coming off the forging press
    01

    Forging & turning

    GCr15 bar and tube is cut, heated and forged into ring blanks, then turned to leave a uniform grinding allowance. Forging rather than machining from solid keeps the grain flow following the raceway, which is the surface that eventually fails.

    Blank dimensions and grinding stock checked at set-up and per shift.

  2. Bearing rings entering a continuous hardening furnace
    02

    Heat treatment

    Through-hardening brings GCr15 / 100Cr6 to 58–64 HRC; carburizing case-hardens 20CrMnTi where the section is heavy or the load is shock. Rings are then stabilized so they hold size in service rather than growing in the housing.

    Core and surface hardness per lot; retained austenite and dimensional stability to the ordered temperature class.

  3. Raceway grinding machine finishing a bearing inner ring
    03

    Raceway grinding

    Faces, bore, outer diameter and raceway are ground in sequence on separate machines. This is where the tolerance class is created: P0, P6, P5 or P4 is a grinding outcome, not a sorting outcome.

    Bore and outer diameter deviation, raceway roundness and face runout measured to ISO 492 on every setup.

  4. Superfinishing stones acting on a ground raceway
    04

    Honing & superfinishing

    The ground raceway is honed to remove the grinding lay and bring surface roughness down to a fraction of a micrometre. Raceway finish is what decides whether a lubricant film forms, and therefore what decides bearing life far more than the load rating alone.

    Surface roughness Ra and waviness measured per lot.

Video: UCFC200 Series Round Flange Units

UCF200 Series Hands On Bearing View

Third-party video, selected automatically for this topic. It is not produced by Bushing Bearings and is not a specification source — use the tables on this page for dimensional data.

Frequently Asked Questions

Which standard applies to UCFC200 Series Round Flange Units, and how are they located on the shaft?

UCFC200 Series Round Flange Units are manufactured to ISO 3228 / JIS B 1559, which fixes the boundary dimensions on this page. They are mounted with a bolt-down housing, so no machined housing bore is needed in the frame.

What sizes are available for UCFC200 Series Round Flange Units?

The table on this page lists 9 sizes for UCFC200 Series Round Flange Units, ranging from UCFC204 to UCFC212. Sizes outside the table can be quoted on request.

In which materials are UCFC200 Series Round Flange Units supplied?

UCFC200 Series Round Flange Units are supplied in a GCr15 insert bearing in a grey cast iron, ductile iron, pressed steel, thermoplastic or 304 stainless housing. Material is only part of the specification: state the internal clearance group (or preload class), the seal or shield type and the cage material alongside the designation, because all three change the part you receive.

What shaft and housing tolerances suit UCFC200 Series Round Flange Units?

The smallest bore on this page is 20 mm. With a rotating inner ring under normal load the shaft is normally machined to k5 or m6 and the housing to H7 or J7, so the inner ring is an interference fit and the outer ring can move axially to take up thermal growth. Reverse the fits when it is the outer ring that rotates. Check the figure against your own load case before machining.

How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration — designation, internal clearance, seal type and cage — and click "Request this configuration". A specialist from Bushing Bearings will respond within one business day.