Page 8 of Complete Line of Press Fit Fasteners by Driv-Lok, Inc.

Pin Diameter Decimal Equivalent Recommended Drill Size Hole Tolerances ADD To Nominal Diameter 6 Grooved Pins (cont.) GROOVED PIN DRILLING PROCEDURES AND HOLE TOLERANCES Insertion and holding forces vary with hole size and groove length. Recommended hole size tolerances are based on a groove length to hole diameter ratio of approximately 5 to 1. A higher ratio than 5 to 1 may require adjustment in hole size. If the ratio is 1 to 1 or less then the hole tolerance should be reduced approximately 60%. Smaller hole size variation should result in more consistent insertion forces. These factors should be considered when designing press fit fasteners for your application. Hole sizes should never be smaller than the nominal diameter of the grooved pin. Minimum hole size equals nominal grooved pin diameter. Maximum hole size equals minimum hole size plus recommended hole tolerance from the chart. Example: 1/8 diameter pin: Min. hole .125 Max. hole .125 .003 =.128 A slight chamfer on the hole is recommended particularly with holes in hardened steel, cast iron, and with hardened grooved pins. SPECIAL ORDERS AND OPTIONS DRIV-LOKs engineering department will work with customers to provide technical assistance for special orders. Shown at left are a few of the groove types and configuration options available. Special materials, diameters, lengths, and finishes are also available as special orders. See ORDERING INFORMATION on page 20 for options available. WEIGHTS MEASURES See page 17. TECHNICAL DATA See page 19. ORDERING INFORMATION See pages 20 21. TYPE D Type D has three reverse taper grooves extending one-half the length of the pin. Recommended for use in blind holes as a top pin, roller pivot, dowel, or for certain hinge or linkage applications. Reverse taper grooves permit easy insertion in blind holes. TYPE B Type B Pins have three tapered grooves extending one-half the length of the pin. This type is widely used as a hinge or pivot pin. Driven or pressed into a straight drilled hole, the grooved portion locks in one part, while the ungrooved portion will remain free. Also excellent for dowel and locating applications. TYPE A3 Type A3 Pins have three fulllength parallel grooves with a short pilot to insure easy starting. They are recommended for applications requiring maximum locking effect where severe vibration and/or shock loading are present. TYPICAL OPTIONAL GROOVE TYPES OPTIONAL GROOVE CONFIGURATIONS SQUARE OVAL DIAMOND TAPERED 1/16" .0625 1/16" .002" 3/32 .0938 3/32 .003" 1/8 .1250 1/8 .003" 5/32 .1563 5/32 .003" 3/16 .1875 3/16 .004" 7/32 .2188 7/32 .004" 1/4 .2500 1/4 .004" 5/16 .3125 5/16 .005" 3/8 .3750 3/8 .005" 7/16 .4375 7/16 .006" 1/2 .5000 1/2 .006" STANDARD SIZES FOR TYPES A, C, E, H U Diameters Lengths 1/16 3/32 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 1/4 n n n 3/8 n n n n n 1/2 n n n n n n n 5/8 n n n n n n n n 3/4 n n n n n n n n n 7/8 n n n n n n n n n n 1 n n n n n n n n n n n 1 1/4 n n n n n n n n n n 1 1/2 n n n n n n n n n 1 3/4 n n n n n n n n 2 n n n n n n n n 2 1/4 n n n n n n 2 1/2 n n n n n 2 3/4 n n n n n 3 n n n 3 1/4 n n n 3 1/2 n n n Diameters Lengths 1/16 3/32 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 3/8 n n n n n 1/2 n n n n n n n 5/8 n n n n n n n n 3/4 n n n n n n n n n 7/8 n n n n n n n n n n 1 n n n n n n n n n n n 1 1/4 n n n n n n n n n n 1 1/2 n n n n n n n n n 1 3/4 n n n n n n n n 2 n n n n n n n n 2 1/4 n n n n n n 2 1/2 n n n n n 2 3/4 n n n n n 3 n n n 3 1/4 n n n 3 1/2 n n n STANDARD SIZES FOR TYPE G (Formerly F G) DRIV-LOK, Inc. 19 RECOMMENDED PIN DIAMETER FOR VARIOUS SHAFT SIZES AND TORQUE TRANSMITTED BY PIN IN DOUBLE SHEAR Technical Data Grooved Pin Diameter Shaft Size Torque Relationships This table is a guide in selecting the proper size DRIV-LOK Grooved Pin to use for fastening machine members to shafts of given sizes and for specific load requirements. Torque and horsepower ratings are based on pins made of cold finished, low carbon steel and a safety factor of 8 is assumed. Minimum Double Shear Values (lbs.) of DRIV-LOK Pins of Various Materials Shaft Pin Torque H.P. at Size Diameter Inch Lbs. 100 R.P.M. 3/16 1/16 4.8 .007 7/32 5/64 8.5 .013 1/4 3/32 13.9 .022 5/16 7/64 23.8 .038 3/8 1/8 37.5 .060 7/16 5/32 62.9 .100 1/2 5/32 71.9 .114 9/16 3/16 116.4 .185 11/16 7/32 193.8 .307 3/4 1/4 275.6 .437 13/16 1/4 298.6 .474 1/16 410 720 540 250 430 3/32 890 1,600 1,240 560 1,150 1/8 1,600 2,820 2,200 990 1,875 5/32 2,300 4,520 3,310 1,540 2,750 3/16 3,310 6,440 4,760 2,200 4,150 7/32 4,510 8,770 6,480 3,020 5,850 1/4 5,880 11,500 8,460 3,950 7,050 5/16 7,660 17,900 12,700 6,170 10,800 3/8 11,000 26,000 18,200 9,050 16,300 7/16 15,000 35,200 24,800 12,100 19,800 1/2 19,600 46,000 32,400 15,800 27,100 7/8 1/4 322 .510 15/16 5/16 449 .712 1 5/16 479 .759 1 1/16 5/16 509 .807 1 1/8 3/8 773 1.23 1 3/16 3/8 816 1.30 1 1/4 3/8 859 1.36 1 5/16 7/16 1230 1.95 1 3/8 7/16 1289 2.05 1 7/16 7/16 1348 2.14 1 1/2 1/2 1838 2.92 Shaft Pin Torque H.P. at Size Diameter Inch Lbs. 100 R.P.M. GROOVED PINS SLOTTED SPRING PINS Pin Diameter Low Carbon Shear-Proof Alloy Steel (RC 40-48) Corrosion Resistant Steel Brass 1074 Steel AND 420 SS Notes: Holding The Future Together

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