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DIR425 → SMR4-25/1 replacement

Manufacturer-published cross-reference

Aurora Motors DIR425 replacement

WorldWide Electric SMR4-25/1 appears in the same manufacturer-published cross-reference row as Aurora Motors DIR425 at 25:1 · AGMA size 207.

Published targetSMR4-25/1WorldWide Electric25:1

Evidence publisherWorldWide ElectricEvidence typePublished cross-referenceReviewedSep 21, 2026Open source ↗

Replacement referenceDirectional lookup

Existing / searched modelAurora MotorsDIR425Open source-model record →

Published target modelWorldWide ElectricSMR4-25/1Open target specs →

What the source establishesPublished cross-reference

WorldWide Electric publishes this row in its SMR cross table, listing the WorldWide SMR model alongside competitor model numbers at the same published 25:1 cross-reference position. This preserves the manufacturer-published cross-reference claim without independently asserting that every listed competitor model is pairwise interchangeable.

Evidence meaning

The source and target appear in the same manufacturer-published cross-reference row.

Aurora Motors DIR425 and WorldWide Electric SMR4-25/1 are tied by the published source at 25:1 · AGMA size 207.

Evidence boundary

A cross-reference is a qualified replacement lead, not proof of a drop-in swap for every configured unit.

Published target specifications4 model-level fields

WorldWide ElectricSMR4-25/1SMR Series — The Original

Full model record →

Bore type: TaperedSource ↗
Maximum output bore: 2-7/16 inSource ↗
Nominal ratio: 25 :1Source ↗
Box size: 4Source ↗

Other models in the same published row8

Browning207SMTP25Same 25:1 published row →Cleveland GearCGUSM4-25Same 25:1 published row →Dodge TXTTXT425TSame 25:1 published row →Falk5207J25Same 25:1 published row →Hub CityPT4207525Same 25:1 published row →LMIMSC0425Same 25:1 published row →Sumitomo Drive TechnologiesHSM207F-25Same 25:1 published row →VortexVXT425 XDSame 25:1 published row →

Replacement verification checklistBefore purchase

RatioConfirm nominal and actual ratio against required output speed.

Shaft / boreMeasure the driven shaft and verify bushing or bore configuration.

InputCheck high-speed shaft, motor frame, sheave and input interface.

MountingCompare center height, footprint, torque-arm geometry and housing clearances.

AccessoriesDo not assume existing backstops, motor mounts, belt guards or screw-conveyor hardware transfer.

DutyRecheck torque, service factor, shock, starts per hour, temperature and lubrication.

Open SMR4-25/1 specifications Full published row Field checklist Source document ↗