Duplicate Parts

It is very important to note when parts are duplicates or "pairs," and to work them together, for time is thus saved and mistakes avoided. Hence, in making duplicate parts proceed as follows:

1. Plane a face side on each piece in turn.

2. Plane a joint edge on each piece in turn.

3. Gage each of the pieces for width with one setting of the gage.

4. Plane each piece in turn to width.

5. Gage each of the pieces to thickness with one setting of the gage.

6. Plane each piece in turn to thickness.

7. Square one end of each piece in turn.

8. Assemble all the pieces with their joint edges up and their squared ends together. 9. Measure all distances to cuts, mortises, holes, etc., from the squared end and along the joint edge of one of the pieces. Then transfer these measurements to the other pieces by means of the try-square.

10. Separate the parts, finish the lay-out and the cutting of each piece in turn. Notes:

(a) Sometimes parts are duplicates only in certain particulars, e. g., thickness, length, or locations for mortises, holes, etc. In such cases proceed as above, making the necessary omissions.

(b) Sometimes it is better to get out a number of small parts all in one piece and then cut the piece into the proper lengths.

Reference Work: Ask a carpenter how he lays out the "plates" for a house. Ask him to show you other places where he has to deal with pairs and duplicate parts.