Jump to content
 

Replacing Coupling Rods.


snitzl

435 views

Here's a couple of methods you can use for making replacement coupling rods.

 

Its not unusual when scratchbuilding a new loco chassis to make the rods first and use them  as a jig to drill axle bearings holes or holes for axle bushes, but there are times when there's a need to make replacement rods. Here are a couple of methods that may be of use. The  first method is the simplest, but requires the use of either a milling machine or compound slide mounted on a bench drill. For those that don't know what a compound slide is, a simple  miniature version can be found on the GW rivet press, one slide moves the workpiece in the left /right axis, and the second slide moves in the forward / back axis, the workpiece is  moved by turning calibrated dial knobs on each slide. Compound slide tables can be added to any bench drill, you could even use a single axis slide from a lathe and bolt it to the  drill table. This enables you to move the workpiece a precise distance, so that one crankpin  hole can be drilled, workpiece is moved a determined distance, second hole is drilled.

 

Second method requires the use of a lathe to modify a couple of axles that are turned  down at each end to the same diameter as the crankpin bushes.

 

A third method not illustrated below is to use the loco's chassis as a drill jig.
 Clamping the chassis to some rod material and spot drill through the bearings to leave a tiny indent as a drilling guide. Problem with this method is that some bearing material will probably be removed unless an 1/8" dia shaft was used with a smaller drill force fit in the end of the shaft.

 

01-ReCoupRod.jpg.295461eaa923015db83007738f0aa2f3.jpg

02-ReCoupRod.jpg.6df80dd1fbfbb0749246c5dbebc57a41.jpg

03-ReCoupRod.jpg.b8cc99b245f0334ff47e1db648e0ed81.jpg

04-ReCoupRod.jpg.60936e7632cd19a9869c007402b28a76.jpg

 

Snitzl.

 

Edited by snitzl
Re-Upload Images.

0 Comments


Recommended Comments

There are no comments to display.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...