Hi all, Our PTG Chapter started a pinblock project in 1996 with 8 different pieces of pinblock, each piece drilled with 10 different size holes and all pinned with number 2 pins, torque readings were then taken on each pin in 1996 and again in 1999. The following is cut/pasted from a Lotus 123 spreadsheet so the columns are off a bit but you can figure it out. If anyone wants the 123 file just ask. No one remembers what type of block number 6 was... oh well. Drill Size Letter Fraction Metric #1 - Sohmer 5 ply Maple June 1996 Sept 1999 0.25 1/4" 6.35 210 185 0.252 6.4 210 180 0.2559 6.5 205 175 0.2571 F 6.53 180 170 0.2598 6.6 175 160 0.261 G 6.63 160 150 0.2638 6.7 150 125 0.2657 17/64" 6.75 148 130 0.2677 6.8 148 130 0.2717 I 6.9 140 120 Drill Size Letter Fraction Metric #2 - APSCO Dilignit - 18.5 PPI Beech June 1996 Sept 1999 0.25 1/4" 6.35 275 255 0.252 6.4 265 225 0.2559 6.5 280 250 0.2571 F 6.53 280 250 0.2598 6.6 280 245 0.261 G 6.63 280 225 0.2638 6.7 275 230 0.2657 17/64" 6.75 265 225 0.2677 6.8 250 200 0.2717 I 6.9 220 185 Drill Size Letter Fraction Metric #3 Baldwin 49 ply Maple June 1996 Sept 1999 0.25 1/4" 6.35 180 145 0.252 6.4 190 145 0.2559 6.5 190 150 0.2571 F 6.53 205 160 0.2598 6.6 175 145 0.261 G 6.63 200 155 0.2638 6.7 180 145 0.2657 17/64" 6.75 180 150 0.2677 6.8 150 140 0.2717 I 6.9 140 110 Drill Size Letter Fraction Metric #4 - Bolduc 5 ply Maple June 1996 Sept 1999 0.25 1/4" 6.35 230 190 0.252 6.4 230 200 0.2559 6.5 200 165 0.2571 F 6.53 220 185 0.2598 6.6 215 185 0.261 G 6.63 190 155 0.2638 6.7 160 115 0.2657 17/64" 6.75 180 150 0.2677 6.8 160 145 0.2717 I 6.9 110 95 Drill Size Letter Fraction Metric #5 Schaff Dilignit June 1996 Sept 1999 0.25 1/4" 6.35 230 190 0.252 6.4 230 200 0.2559 6.5 225 185 0.2571 F 6.53 225 185 0.2598 6.6 215 175 0.261 G 6.63 200 150 0.2638 6.7 205 160 0.2657 17/64" 6.75 200 160 0.2677 6.8 175 160 0.2717 I 6.9 150 135 Drill Size Letter Fraction Metric #6 ???? 14 PPI Beech June 1996 Sept 1999 0.25 1/4" 6.35 150 125 0.252 6.4 145 125 0.2559 6.5 145 120 0.2571 F 6.53 145 125 0.2598 6.6 140 120 0.261 G 6.63 130 120 0.2638 6.7 110 90 0.2657 17/64" 6.75 105 95 0.2677 6.8 80 75 0.2717 I 6.9 75 65 Drill Size Letter Fraction Metric #7 - Falconwood 20.5 PPI Maple June 1996 Sept 1999 0.25 1/4" 6.35 380 340 0.252 6.4 360 325 0.2559 6.5 380 320 0.2571 F 6.53 360 310 0.2598 6.6 350 300 0.261 G 6.63 275 235 0.2638 6.7 380 325 0.2657 17/64" 6.75 380 330 0.2677 6.8 350 315 0.2717 I 6.9 305 250 Drill Size Letter Fraction Metric #8 - Schaff 11 Ply Maple June 1996 Sept 1999 0.25 1/4" 6.35 210 185 0.252 6.4 210 180 0.2559 6.5 205 175 0.2571 F 6.53 180 170 0.2598 6.6 175 160 0.261 G 6.63 160 150 0.2638 6.7 150 125 0.2657 17/64" 6.75 148 130 0.2677 6.8 148 130 0.2717 I 6.9 140 120 -- Mike McCoy So Central Pa Chapter 170, PTG Middletown, Pa Mailto:mjmc@attglobal.net
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