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Source-backed model directory1,779 records

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Search verified gearbox, gearmotor, reducer, and drive records by model number or manufacturer. Each record links to its specifications, source, and any published replacement evidence.

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Showing 469–504 of 1,779 records

Falk / Rexnord5207J25shaft-mounted gear reducer cross-reference model · Published in WorldWide Electric shaft-mount reducer cross-reference data at ratio 25:1 and AGMA unit size 207. This preserves the published configuration for replacement research; verify shaft/bore, mounting, torque, motor interface, and service duty before substitution.

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Falk / Rexnord5207J25AQuadrive · Falk-published Quadrive 5000-series interchange selection, AGMA size 207, nominal 25:1 ratio, maximum bore 2 7/16 in; Table 1 example duty 5 hp / 15 rpm at 1.0 service factor.

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Hub City521worm gear reducer cross-reference model · This exact Hub City 521 designation appears in Boston Gear's Boston Gear 700 Series Worm Gear Speed Reducers Competitor Interchange Guide P-8565-BG with published ratio guidance "Match installed ratio (5:1–100:1)" and size / dimensional reference "5.25 in center distance". 3 published replacement relationships are available below. Verify shaft or bore details, mounting, torque, duty, accessories, and environment before substitution.

Status unknownOpen →

Falk / Rexnord5215JQuadrive · Manufacturer-documented Falk Quadrive size 5215J with maximum low-speed shaft bore 2 15/16 in and JR/JF/JSC configuration support.

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Falk / Rexnord5215J14shaft-mounted gear reducer cross-reference model · Published in WorldWide Electric shaft-mount reducer cross-reference data at ratio 15:1 and AGMA unit size 215. This preserves the published configuration for replacement research; verify shaft/bore, mounting, torque, motor interface, and service duty before substitution.

Status unknownOpen →

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Falk / Rexnord5215J25shaft-mounted gear reducer cross-reference model · Published in WorldWide Electric shaft-mount reducer cross-reference data at ratio 25:1 and AGMA unit size 215. This preserves the published configuration for replacement research; verify shaft/bore, mounting, torque, motor interface, and service duty before substitution.

Status unknownOpen →

Falk / Rexnord5215J25AQuadrive · Falk-published Quadrive 5000-series interchange selection, AGMA size 215, nominal 25:1 ratio, maximum bore 2 15/16 in; Table 1 example duty 10 hp / 20 rpm at 1.0 service factor.

currentOpen →

Hub City522worm gear reducer cross-reference model · This exact Hub City 522 designation appears in Boston Gear's Boston Gear 700 Series Worm Gear Speed Reducers Competitor Interchange Guide P-8565-BG with published ratio guidance "Match installed ratio (5:1–100:1)" and size / dimensional reference "5.25 in center distance". 3 published replacement relationships are available below. Verify shaft or bore details, mounting, torque, duty, accessories, and environment before substitution.

Status unknownOpen →

Hub City523worm gear reducer cross-reference model · This exact Hub City 523 designation appears in Superior Gearbox's Superior Gearbox VarioDrive Competitor Cross Reference Guide with published ratio guidance "Match installed ratio/application" and size / dimensional reference "VarioDrive size 130". 2 published replacement relationships are available below. Verify shaft or bore details, mounting, torque, duty, accessories, and environment before substitution.

Status unknownOpen →

Hub City524worm gear reducer cross-reference model · This exact Hub City 524 designation appears in Boston Gear's Boston Gear 700 Series Worm Gear Speed Reducers Competitor Interchange Guide P-8565-BG with published ratio guidance "Match installed ratio (5:1–100:1)" and size / dimensional reference "5.25 in center distance". 3 published replacement relationships are available below. Verify shaft or bore details, mounting, torque, duty, accessories, and environment before substitution.

Status unknownOpen →

Hub City525worm gear reducer cross-reference model · This exact Hub City 525 designation appears in Boston Gear's Boston Gear 700 Series Worm Gear Speed Reducers Competitor Interchange Guide P-8565-BG with published ratio guidance "Match installed ratio (5:1–100:1)" and size / dimensional reference "5.25 in center distance". 3 published replacement relationships are available below. Verify shaft or bore details, mounting, torque, duty, accessories, and environment before substitution.

Status unknownOpen →

Sterling Electric525/2525AQ2000RA Worm Gear Reducers · Sterling Electric Style AQ interchange target at 5.25 in center distance; competitor relationships are published only when Sterling marks Interchange Yes.