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M50 cross-reference: F721, 20, EL821, 206Q | Replacement Intelligence

Manufacturer-published cross-reference

M50

Winsmith SMR cross-table row · Match installed ratio/application · AGMA unit size Winsmith ALSQ size M50

PublisherWinsmithCheckedSep 21, 2026

Claim typePublished manufacturer cross-referenceRatioMatch installed ratio/applicationAGMA unit sizeWinsmith ALSQ size M50Open source table ↗

Models printed in this source row8

Publisher targetWinsmithM50

Published comparisonBoston GearF721

Published comparisonDodge20

Published comparisonGrove GearEL821

Published comparisonMorse206Q

Published comparisonMotovarioNMRV050

Published comparisonTranstecnoCM050

Published comparisonVarvelRT050

What the evidence supportsClaim scope

Winsmith publishes ALSQ M50 in its 2025 interchange guide beside the listed competitor models. The guide distinguishes 100% interchangeable mounting from slightly different mounting; verify the source key, dimensions, ratio and application before ordering.

This page does say

These model numbers appear together in the cited manufacturer-published cross-reference row.
Winsmith identifies M50 as the target model in that published row.
The source associates the row with Match installed ratio/application and AGMA unit size Winsmith ALSQ size M50.

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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