Marking the location of field-frame bar tenons to field-frame rings

Introduction

This article describes one easy way to mark the location of the holes for field-frame bar tenons to the field-frame rings. The assumption is that the tenon of the field-frame bars have been cut, and that the holes in the field-frame rings will be drilled and files to shape. An easier alternative - provided proper tools are available - would be to use forging and punching to achieve the same results.

The process step-by-step

First make a steel template which has rectangular holes to mark the location of the field-frame bars:

Use the template to mark the location of the field-frame bars:

Mark the location of the holes with field-frame bar tenons:

Unless you've cut the tenons very carefully to the same width and to the exact center, make sure you the tenons with particular holes.