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04UCBN2 cross-reference: SFN15B, M0420 BM, D30, D31 | Replacement Intelligence

Manufacturer-published cross-reference

04UCBN2

Falk / Rexnord SMR cross-table row · Verify motor speed and installed ratio · AGMA unit size Ultramite size 04

PublisherFalk / RexnordCheckedSep 21, 2026

Claim typePublished manufacturer cross-referenceRatioVerify motor speed and installed ratioAGMA unit sizeUltramite size 04Open source table ↗

Models printed in this source row15

Publisher targetFalk / Rexnord04UCBN2

Published comparisonBrook Hansen S3 SeriesSFN15B

Published comparisonDavid BrownM0420 BM

Published comparisonFlender/MotoxD30

Published comparisonFlender/MotoxD31

Published comparisonFlender/MotoxZ30

Published comparisonHansen J SeriesJFN13B

Published comparisonLeroy Somer NXTN21

Published comparisonMorse Powerline210

Published comparisonNORD UNICASESK12

Published comparisonSEW-EURODRIVER40

Published comparisonSterling ElectricH0402

Published comparisonSumitomo SM-Cyclo3100

Published comparisonSumitomo SM-Cyclo3105

Published comparisonWinsmith J SeriesJFN13B

What the evidence supportsClaim scope

Falk/Rexnord Form 950-501 publishes 04UCBN2 in its base-mounted helical dimensional comparison for size 04. The guide states that several competitive helical designs are drop-in replacements but instructs users to verify motor speed, gear ratio, output RPM, mounting position and current catalog ratings. Availability of this historical configuration should also be confirmed.

This page does say

These model numbers appear together in the cited manufacturer-published cross-reference row.
Falk / Rexnord identifies 04UCBN2 as the target model in that published row.
The source associates the row with Verify motor speed and installed ratio and AGMA unit size Ultramite size 04.

This page does not say

Every competitor model listed beside each other is independently certified as pairwise interchangeable.
Every installed accessory, bushing, motor mount, backstop, shaft, or screw-conveyor component will transfer unchanged.
The cross-reference removes the need to verify application torque, mounting, environment, and configuration.

Before treating it as a drop-in replacementVerification checklist

Ratio & speedVerify the actual ratio and required output speed.

Bushing / boreConfirm the installed shaft diameter and the required tapered bushing or bore arrangement.

AccessoriesCheck torque arm, backstop, motor mount, belt guard, screw-conveyor flange and drive shaft individually.

Torque & serviceConfirm continuous/peak torque, service factor, starts, shock load and thermal duty.

EnvelopeVerify center height, housing clearance and all mounting dimensions against the drawing.

EnvironmentConfirm lubricant, seals, ambient temperature, washdown/corrosion and hazardous-area requirements.

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