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TQ21 cross-reference: F921, F721, 206Q, 20Q | Replacement Intelligence

Manufacturer-published cross-reference

TQ21

Toledo Gear SMR cross-table row · Match installed ratio · AGMA unit size 2.06 in center distance

PublisherToledo GearCheckedSep 21, 2026

Claim typePublished manufacturer cross-referenceRatioMatch installed ratioAGMA unit size2.06 in center distanceOpen source table ↗

Models printed in this source row11

Publisher targetToledo GearTQ21

Published comparisonBaldorF921

Published comparisonBoston GearF721

Published comparisonBrowning Raider206Q

Published comparisonDodge Tigear20Q

Published comparisonFalk Omnibox1206WBM

Published comparisonGrove GearBMQ821

Published comparisonMorse Raider721F

Published comparisonOhio GearBMQ2206

Published comparisonWinsmith920MDN

Published comparisonWorldWide ElectricHDRF206-L/R

What the evidence supportsClaim scope

Toledo Gear publishes TQ21 at 2.06 in center distance for c-face input / shaft output and lists the competitor models in the same TG-90 interchange row. Toledo describes TG-90 reducers as designed to be functionally interchangeable while requiring current rating and dimensional verification.

This page does say

These model numbers appear together in the cited manufacturer-published cross-reference row.
Toledo Gear identifies TQ21 as the target model in that published row.
The source associates the row with Match installed ratio and AGMA unit size 2.06 in center distance.

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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