Woodworker's Journal 1982-6-6, страница 20
EARN UP TO s12 AN HOUR IN YOUR OWN SPARE TIME or FULL TIME SHARPENING BUSINESS! ON OUR You risk nothing by accepting this offer to see how easily you can QH m n A y 'urn your spare time into big Cash 1 Profits with your own Complete CDCC Sharpening Shop No selling ■ ilCC no previous experience needed TQi a I Our famous Sharp-All and I 111 AL show-how instruction set you up flEEEB to make $200 S500. $700 a Urrfcn month CASH sharpening Saws. Knives Scissors Lawnmowers Shop and Garden Tools all cutting edges Send for all the facts! Our free Book tells how to start a profitable, lifetime home sharpening business, how we help you grow, how we'll finance you Send for FREE details — mail coupon below or postcard TODAY' Folty Balsa* Co. 60080 Field Building. Kansas City. Mo. 64111 No Obligation...No Salesman Will Call * YES ED f0UT,£lSAWC0 60060 fltlD *oc mns*sc,ty M0 M1" • please send me the FREE BOOK that gives full details. • Citv-SUtc_Z'P_ CAPTAIN'S DESK Easy to Make With Full Size Plans 7 Traditional feeling with a contemporary design. Perfect for your student, den. or study The desk measures 33 V W x j 37 H x 24" D. Slant top opens /I for storage Order plan #310 $8.00 R.J. DESIGNS Dept. AY-112 Box 2251. Southfield. Ml 48037 "y CATALOG $1.00 Many Full-Sin Prolaaaional Plana SI.00 Rafundad With J FULL SIZE PATTERNS * EASY TO BUILD WITH BASIC HAND AND POWER TOOLS * FITS TOGETHER WITHOUT NAILS. SCREWS OR GLUE * EACH PATTERN COMES WITH COMPLETE INSTRUCTIONS * FINISHED ROCKERS HAVE SOLD FOR AS MUCH AS S80 ORDER NOW CHILD ROCKER-24 HIGH S5.00 DOLL ROCKER -15" HIGH 3.50 DOLL HIGH CHAIR 27' HIGH 5.00 DOLL CRADLE 23 LONG A 50 DOLL STROLLER (Not Shown) 26 HIGH 5.00 ORDER Alt FIVE PATTERNS AND SAVE 20'. 18 40 SEND TO TIMOTHY TOY PATTERNS BOX 727 ■ DEPT. H AFTON (STAR VALLEY). WYO. 83U0 The Beginning Woodworker All About Box Joints The box joint, or finger joint as it's sometimes called, is the machine equivalent of the handcut dovetail joint. Though the box joint lacks some of the charm of the dovetail, it has a functional, no-nonsense beauty of its own. It's also a strong joint as the many pins provide a large area of long grain gluing surface. With a table saw, dado head and simple jig, perfectly fitted box joints can be produced easily and quickly. The joint can be cut with hand tools, especially if the pins are of large size but the process is tedious and a dovetail joint would be a better choice. The radial arm saw is not suitable for cutting box joints as the required setup, with the blade in a horizontal position, is both impractical and dangerous.
Once you've decided to use a box joint the first step is to determine the width of the boards to be joined and how many pins and slots should be cut. A pin size should be chosen that will present the most attractive appearance. Generally pins look best when they are considerably narrower than the thickness of the workpieces (Fig. 1 A & B). When working with stock of Vi to V* inch thickness, a pin width of V* to Vi inch looks good. With stock of less than V* inch thickness, substitute a ripping blade for the dado head and let the width of the blade (usually about Vt inch) determine the pin width. Pins that are equal in width to the thickness of the stock present a checkered effect that somehow looks dull and too mechanical (Fig. IB). In laying out the pins and slots on a board cut to finish width it soon becomes obvious that it's not often possible to fit an equal number of pins and slots across the board and have them all equal in width. If, for example, you have two 3/i x 2Vi inch wide boards to be joined and you decide to use a box joint with 3/s inch pins and slots, it's obvious that no multiple of Vt inch will result in 2Vi inches. In other words, you'll end up with three pins of 3/« inch width and one pin of V* inch, which will not look too good (Fig. 2). One solution is to switch to a pin width of V* inch. This will result in an equal number of pins and slots. The joint will be perfectly strong but will present a slightly disturbing unbalanced look (Fig. 3A). It's a subtle distinction but the joint that shows an unequal number of pins on each side JftMT HAS ArO OJ&pUAL. NUMBER OF PlMS OrJ EACM 3IP£ rg. 3 "TWO PIN UAY<7UTS O^lM-r e, 1BETTER |
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