Roundhouse Products - HO Coupler Conversions



NOTE: Our conversions typically requiring the least modification to a model. The How To Instructions and Diagrams are based of the Standard Coupler; they will still be a good guide for the Whisker® & Other suggested coupler options. Always check the coupler heights with either our #205 or newer #206 Coupler Height Gauge.
Roundhouse Products





Stop & Read This! Newer HO-Scale Models with Factory Knuckle Couplers will not be listed. They are easily converted by using our #148 or "scale" head #158 Whisker® Couplers.

**Note: Some manufacturers now produce models with non-industry standard coupler pockets. These smaller coupler pockets may require slight modification to the gearbox or coupler to function properly. If the model has a removable gearbox it can be replaced with a Kadee® gearbox. If the model has an integrated gearbox, the coupler shank may be filed down to fit.

  Whisker® Metal Coupler Standard Coupler Other Coupler Options

0-6-0 Yard Hog (Metal)

0-6-0 Yard Hog (Metal) Conversion

with a

 
 

0-6-0 Switcher (Old)

0-6-0 Switcher (Old) Conversion

with a

 

0-6-0 Switcher (New)

0-6-0 Switcher (New) Conversion
 
 

2-6-0 Mogul (Old)

2-6-0 Mogul (Old) Conversion

with a

 

2-6-0 Mogul (New)

2-6-0 Mogul (New) Conversion
 
 

2-6-2 Prairie (Old)

2-6-2 Prairie (Old) Conversion

with a

 

2-6-0 Mogul (New)

2-6-2 Prairie (New) Conversion
 
 

2-8-0 Consolidation (Old)

2-8-0 Consolidation (Old) Conversion

with a

 

2-8-0 Consolidation (New)

2-8-0 Consolidation (New) Conversion
 
 

4-4-2 Atlantic (Old)

4-4-2 Atlantic (Old) Conversion

with a

 

4-4-2 Atlantic (New)

4-4-2 Atlantic (New) Conversion
 
 

4-6-0 Ten Wheeler (Old)

4-6-0 Ten Wheeler (Old) Conversion

with a

 

4-6-0 Ten Wheeler (New)

4-6-0 Ten Wheeler (New) Conversion
 
 

Climax

Climax Conversion
Any Medium Centerset Coupler

Shay

Shay Conversion
 
 

Alco RS-3

Alco RS-3 Conversion
Any Medium Centerset Coupler

Box Cab Diesel

Box Cab Diesel Conversion
Any Medium Centerset Coupler

EMD Model 40 “Critter”

 
 

Track Cleaner

Track Cleaner Conversion
Any Medium Centerset Coupler

All Rolling Stock

All Rolling Stock Conversion
Any Medium Centerset Coupler

All Rolling Stock (Old Time)

All Rolling Stock (Old Time) Conversion
 
 

Hopper, Sand (Metal)

Hopper, Sand (Metal) Conversion

with a

 
 

Ore Car (Older Metal)

Ore Car (Older Metal) Conversion
 
 

Pullman Palace Cars

Pullman Palace Cars Conversion
Any Medium Centerset Coupler

Harriman Passenger Cars

Harriman Passenger Cars Conversion
Any Medium Centerset Coupler

Old-Time Passenger Cars 50’

Old-Time Passenger Cars 50’ Conversion
Any Medium Centerset Coupler

Anywhere a NO.5® is listed, the #28, #58 or #118, #119, #158, #148 Whisker Coupler can be used in its place.


*Our conversion’s based on only one model from a production run, there may be inconsistencies in a model’s production run that require a different coupler or model modifications to achieve the proper coupler height for coupler function.

** Metal Coupler Note: It is not recommended to use a metal coupler directly on a metal surface to avoid the possible electrical crossover or shorting that may cause damage.

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#6404 CNA #794321

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