Standard Key Slot Dimensions

In the Metric system it is common practice to specify the key size. Referencing Figure 1, the Metric key size is W x T. The keyway dimensions are also different from the English system. Metric keyways are dimensioned by width and depth as measured from the radius of the shaft to the center of the keyway. Keyway Depth (Normally 1/2 of width) Return to broaching: 2388 State Route 726 Eaton, Ohio 45320 (937) 456-2232 Fax (937) 456-2282. All this does, is calculate the radius height that is added to the ½ dim. That dimension changes with the diameter of the shaft and width of the key. Just did a 7/8' key in 3.4375 shaft.4375 +.057 =.4945. That's how far you go down after touch off. What is the best way to call out a slot? I have used basic dimension to reference the true center of the slot from 2 perpendicular datums. Then I called out the width of the slot and the height (the length from one tangent line off the full radius to the other tangent line) using standard dimension with tolerances. Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm). From To Width (W) Depth (h) Width (W) Depth (T) 6 8 2 1.0 2 2 9 10 3 1.4 3 3 11 12 4 1.8 4 4 13 17 5 2.3 5 5 18 22 6 2.8 6 6 23 30 8 3.3 8 7 31 38 10 3.3 10 8 39 44 12 3.3 12 8 45 50 14 3.8 14 9 51 58 16 4.3 16 10 59 65 18 4.4 18 11 66 75 20 4.9 20 12 76 86.

DIN 6885/1 :- Definition

Drive Type Fastenings without Taper Action; Parallel Keys, Keyways, Deep Pattern

T Slot Nut Dimensions

Standard Shaft Key Slot Dimensions

Labels: DIN, Engineering Standards and Codes, feature