How to Identify Your Bridgeport Milling Machine by Serial Number
If you own a Bridgeport milling machine, you may want to know more about its history and specifications. One way to do that is by identifying your machine by its serial number. The serial number can tell you when and where your machine was made, as well as what features and options it has.
But where can you find the serial number on your Bridgeport mill And how can you decode it In this article, we will show you how to locate and interpret the serial number on your Bridgeport milling machine.
Where to Find the Serial Number on Your Bridgeport Mill
The serial number on your Bridgeport mill is located on the knee casting. The knee casting is the part of the machine that supports and moves the saddle and table. Standing in front of the machine, crank the Y axis handle to move the saddle to the rear of its travel. The sliding guards will move to the rear exposing the stamped number.
The serial number is usually composed of one or two letters followed by a series of numbers. For example, BR-123456 or BH-7890. The letters indicate the type of head that your machine has. The most common types are J head, 2J head, and M head. The numbers indicate the production date and sequence of your machine.
How to Decode the Serial Number on Your Bridgeport Mill
To decode the serial number on your Bridgeport mill, you need to refer to a table that lists the production dates and ranges for each type of head. You can find such tables online or in books about Bridgeport mills. Here is an example of a table for J head machines: