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B050 cross-reference: 200, 921, VF49, 721 | Replacement Intelligence

Manufacturer-published cross-reference

B050

Superior Gearbox SMR cross-table row · Match installed ratio/application · AGMA unit size VarioDrive size 050

PublisherSuperior GearboxCheckedSep 21, 2026

Claim typePublished manufacturer cross-referenceRatioMatch installed ratio/applicationAGMA unit sizeVarioDrive size 050Open source table ↗

Models printed in this source row46

Publisher targetSuperior GearboxB050

Published comparisonBaldor200

Published comparisonBaldor 900 Series921

Published comparisonBonfiglioliVF49

Published comparisonBoston Gear 700 Series721

Published comparisonBoston Gear 700 SeriesH721

Published comparisonDodge TigearS200

Published comparisonDodge Tigear-220S

Published comparisonDodge Tigear-220SH

Published comparisonElectra EL SeriesB821

Published comparisonElectra EL SeriesH821

Published comparisonElectra Original21M

Published comparisonGrove Gear IronManB821

Published comparisonGrove Gear IronManH821

Published comparisonGrove Gear OE StyleB206

Published comparisonGrove Gear QuadroB520

Published comparisonGrove Gear QuadroH520

Published comparisonHampton MA SeriesB50

Published comparisonHampton MA SeriesK50

Published comparisonHampton MA Series

What the evidence supportsClaim scope

Superior Gearbox publishes B050 (VarioDrive size 050, input shaft) as a competitor cross-reference target. Superior describes VarioDrive as functionally interchangeable with listed drives while requiring independent verification of ratings, dimensions, fit and application suitability.

This page does say

These model numbers appear together in the cited manufacturer-published cross-reference row.
Superior Gearbox identifies B050 as the target model in that published row.
The source associates the row with Match installed ratio/application and AGMA unit size VarioDrive size 050.

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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