Page 10 of Complete Line of Press Fit Fasteners by Driv-Lok, Inc.

8 Hardened Lok-Dowels Vent Dowels APPLICATION Vent Dowels are most commonly used in blind hole applications because they eliminate the need for costly machining which would be necessary to prevent air locks. The Vent Dowel is interchangeable with most standard machine dowels. DESCRIPTION The Vent Dowel had three helical grooves on its diameter as shown above. The diameter is ground to a total tolerance of .0005 in. with a surface roughness of 32 RMS maximum. Vent Dowels may be made from a variety of steels. FUNCTION The three helical grooves on a DRIV-LOK Vent Dowel function as vents to relieve air locks that may occur when standard dowels are inserted into blind holes. The helical grooves provide a width and depth sufficient to relieve the air lock without disturbing the .0005 in. total diameter tolerance of the pin. SPECIAL ORDERS All Vent Dowels are special orders and are manufactured to customer specifications. Available Vent Dowel diameters range from 1/4" through 3/4" and lengths from 1/2" through 6". DRIV-LOKs engineering department will work with customers to provide technical assistance for special orders. Special materials, diameters, lengths, end configurations, and finishes are available by request as special orders. See ORDERING INFORMATION on page 20 for options available for special Vent Dowels . ORDERING INFORMATION See pages 20 21. SPC assures high quality .0005 total tolerance Optional end configurations Helical groove Microfinish 32 RMS Rc60-64 surface hardness ORDERING INFORMATION See pages 20 21. SPECIAL ORDERS AND OPTIONS DRIV-LOKs engineering department will work with customers to provide technical design assistance for special orders. Special materials, diameters, lengths, groove types, end configurations, and finishes are available by request as special orders. See ORDERING INFORMATION on page 20 for options available for special Lok-Dowels . APPLICATION DRIV-LOK Lok-Dowels provide a simplified method of establishing and maintaining precise alignment between component parts. DESCRIPTION Standard Lok-Dowels are made from cold finished low carbon steel and have a special groove configuration as shown. They are centerless ground, polished, and case hardened to provide good wear resistance. FUNCTION Lok-Dowels are pressed or driven into a drilled and reamed hole. The grooved portion of the Lok-Dowel remains in place while the ungrooved end of the pin is easily removed from the mating part. The expanded diameter allows a greater hole tolerance to be used with a Lok-Dowel than can be used with a regular dowel pin. INSTALLATION PROCEDURE Drill hole slightly undersize Ream full size Drive or press LOK DOWELS into place LOK DOWELS lock securely and parts separate easily Case hardened SPC assures high quality .0005 total tolerance Diameter/length options Low carbon steel Ground and polished finish Groove type and end configuration options LOK-DOWEL DIMENSIONS Nominal Diameters 1/8 3/16 1/4 5/16 3/8 1/2 Decimal .1245 .1870 .2495 .3120 .3745 .4995 Specification .1250 .1875 .2500 .3125 .3750 .5000 Expanded .130 .194 .257 .321 .384 .511 Diameter .133 .197 .260 .324 .387 .514 Length .010 in. 3/8 n 1/2 n n n n 5/8 n n n n 3/4 n n n n n 7/8 n n n n n 1 n n n n n n 1 1/4 n n n n n 1 1/2 n n n n 1 3/4 n n n 2 n n DRIV-LOK, Inc. 17 Grooved, Shear-Proof, Knurled, Barbed and Plain Pins, Lok-Dowels, Vent Dowels and Plain Dowels WEIGHTS (lbs.) per 1000 Pieces (Steel) Square Keys WEIGHTS (lbs.) per 1000 Pieces Weights Measures DIAMETER 1/16 5/64 3/32 7/64 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 SQUARE DIMENSION 1/8 3/16 1/4 5/16 3/8 7/16 1/2 1/4 .22 .34 .49 .67 .87 3/8 .33 .51 .73 1.00 1.30 2.04 2.94 1/2 .43 .68 .98 1.33 1.74 2.72 3.91 5.33 6.96 5/8 .54 .85 1.22 1.66 2.17 3.40 4.89 6.66 8.70 13.59 3/4 .65 1.02 1.47 2.00 2.61 4.08 5.87 7.99 10.44 16.31 23.48 7/8 .76 1.19 1.71 2.33 3.04 4.76 6.85 9.32 12.18 19.03 27.40 37.29 1 .87 1.36 1.96 2.66 3.48 5.44 7.83 10.65 13.92 21.74 31.31 42.62 55.67 1 1/4 2.45 3.33 4.35 6.80 9.78 13.32 17.40 27.18 39.14 53.27 69.58 1 1/2 5.22 8.15 11.74 15.98 20.87 32.62 46.97 63.93 83.50 1 3/4 9.51 13.70 18.65 24.35 38.05 54.80 74.58 97.41 2 10.87 15.66 21.31 27.83 43.49 62.62 85.24 111.33 2 1/4 17.61 23.97 31.31 48.92 70.45 95.89 125.25 2 1/2 19.57 26.64 34.79 54.36 78.28 106.55 139.16 2 3/4 29.30 38.27 59.80 86.11 117.20 153.08 3 31.96 41.75 65.23 93.94 127.86 167.00 3 1/4 45.23 70.67 101.76 138.51 180.91 3 1/2 76.10 109.59 149.17 194.83 3 3/4 117.42 159.82 208.74 4 125.25 170.47 222.66 4 1/4 Add 10% for Brass or Bronze 133.07 181.13 236.58 4 1/2 191.78 250.49 Notes: 1/2 2.21 4.98 8.86 13.84 3/4 3.32 7.48 13.29 20.76 29.90 40.70 1 4.43 9.97 17.72 27.69 39.87 54.26 70.88 1 1/4 5.54 12.46 22.15 34.61 49.83 67.83 88.59 1 1/2 6.64 14.95 26.58 41.53 59.80 81.40 106.31 1 3/4 7.75 17.44 31.01 48.45 69.77 94.96 124.03 2 8.86 19.93 35.44 55.37 79.73 108.53 141.75 2 1/4 22.43 39.87 62.29 89.70 122.09 159.47 2 1/2 24.92 44.30 69.21 99.67 135.66 177.19 2 3/4 48.73 76.14 109.63 149.23 194.91 3 53.16 83.06 119.60 162.79 212.63 3 1/2 139.54 189.92 248.06 4 139.54 189.92 248.06 4 1/2 318.94 Holding The Future Together

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