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

UCFL200 Series Two-Bolt Flange Units

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

UCFL200 Series Two-Bolt Flange Units to ISO 3228 / JIS B 1559 are catalogued in bore 12-90 mm. 18 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
ISO 3228 / JIS B 1559
Bore
12-90 mm
Catalogued sizes
18

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

UCFL200 Series Two-Bolt 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 UCFL200 Series Two-Bolt 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
UCFL20112UC201Grey cast iron
UCFL20215UC202Grey cast iron
UCFL20317UC203Grey cast iron
UCFL20420UC204Grey cast iron
UCFL20525UC205Grey cast iron
UCFL20630UC206Grey cast iron
UCFL20735UC207Grey cast iron
UCFL20840UC208Grey cast iron
UCFL20945UC209Grey cast iron
UCFL21050UC210Grey cast iron
UCFL21155UC211Grey cast iron
UCFL21260UC212Grey cast iron
UCFL21365UC213Grey cast iron
UCFL21470UC214Grey cast iron
UCFL21575UC215Grey cast iron
UCFL21680UC216Grey cast iron
UCFL21785UC217Grey cast iron
UCFL21890UC218Grey cast iron

UCFL200 Series Two-Bolt Flange Units (ISO 3228 / JIS B 1559) are insert bearings & housed units. The full size table is below, followed by the material and cage options, how the bearing is located on the shaft and in the housing, and where the type is and is not the right choice.

What Are UCFL200 Series Two-Bolt Flange Units?

UCFL200 Series Two-Bolt 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

UCFL200 Series Two-Bolt Flange Units are supplied to order. Pricing starts from approximately US$6.50 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: UCFL200 Series Two-Bolt 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 UCFL200 Series Two-Bolt Flange Units, and how are they located on the shaft?

UCFL200 Series Two-Bolt 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 is the size range of UCFL200 Series Two-Bolt Flange Units?

The table on this page lists 18 sizes for UCFL200 Series Two-Bolt Flange Units, ranging from UCFL201 to UCFL218. Sizes outside the table can be quoted on request.

In which materials are UCFL200 Series Two-Bolt Flange Units supplied?

UCFL200 Series Two-Bolt 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 UCFL200 Series Two-Bolt Flange Units?

The smallest bore on this page is 12 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.