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. See dimensions W and h in Figure 1. Unless otherwise specified, the shaft keyway is assumed to be standard. Also, T 1 and T 2. + Keyways will be furnished per ISO/R773 and Js9 width tolerance unless otherwise specified. (Dimensions comply with DIN 6885/1) † Requires use of chamfered keys. Surface Finish — Sides and bottom of keyways shall not exceed 250 micro inches. Square keys are used for smaller shafts and rectangular faced keys are used for shaft diameters over 6.5 in (170 mm) or when the wall thickness of the mating hub is an issue. Set screws often accompany parallel keys to lock the mating parts into place. The keyway is a longitudinal slot in both the shaft and mating part. NA0139-1993 KEYWAY AND KEY SLOT DIMENSIONS METRIC $14.50 ISO 3912:1977 Woodruff keys and keyways $26.00 ISO 3117:1977 Tangential keys and keyways $26.00 ISO 2492:1974 Thin taper keys with or without gib head and their corresponding keyways (Dimensions in millimetres) $26.00.
DIN 6885/1 :- Definition
Drive Type Fastenings without Taper Action; Parallel Keys, Keyways, Deep Pattern
Metric Keyway Dimensions
| d (from) mm | d (to) mm | bxh | t1 | t2 |
| 6 | 8 | 2x2 | 1.2 | 1 |
| 8 | 10 | 3x3 | 1.8 | 1.4 |
| 10 | 12 | 4x4 | 2.5 | 1.8 |
| 12 | 17 | 5x5 | 3 | 2.3 |
| 17 | 22 | 6x6 | 3.5 | 2.8 |
| 22 | 30 | 8x7 | 4 | 3.3 |
| 30 | 38 | 10x8 | 5 | 3.3 |
| 38 | 44 | 12x8 | 5 | 3.3 |
| 44 | 50 | 14x9 | 5.5 | 3.8 |
| 50 | 58 | 16x10 | 6 | 4.3 |
| 58 | 65 | 18x11 | 7 | 4.4 |
| 65 | 75 | 20x12 | 7.5 | 4.9 |
| 75 | 85 | 22x14 | 9 | 5.4 |
| 85 | 95 | 25x14 | 9 | 5.4 |
| 95 | 110 | 28x16 | 10 | 6.4 |
| 110 | 130 | 32x18 | 11 | 7.4 |
| 130 | 150 | 36x20 | 12 | 8.4 |
| 150 | 170 | 40x22 | 13 | 9.4 |
| 170 | 200 | 45x25 | 15 | 10.4 |
| 200 | 230 | 50x28 | 17 | 11.4 |
| 230 | 260 | 56x32 | 20 | 12.4 |
| 260 | 290 | 63x32 | 20 | 12.4 |
| 290 | 330 | 70x36 | 22 | 14.4 |
| 330 | 380 | 80x40 | 25 | 15.4 |
| 380 | 440 | 90x45 | 28 | 17.4 |
| 440 | 550 | 100x50 | 31 | 19.5 |
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. See dimensions W and h in Figure 1. Unless otherwise specified, the shaft keyway is assumed to be standard. Also, T 1 and T 2. + Keyways will be furnished per ISO/R773 and Js9 width tolerance unless otherwise specified. (Dimensions comply with DIN 6885/1) † Requires use of chamfered keys. Surface Finish — Sides and bottom of keyways shall not exceed 250 micro inches. Square keys are used for smaller shafts and rectangular faced keys are used for shaft diameters over 6.5 in (170 mm) or when the wall thickness of the mating hub is an issue. Set screws often accompany parallel keys to lock the mating parts into place. The keyway is a longitudinal slot in both the shaft and mating part. NA0139-1993 KEYWAY AND KEY SLOT DIMENSIONS METRIC $14.50 ISO 3912:1977 Woodruff keys and keyways $26.00 ISO 3117:1977 Tangential keys and keyways $26.00 ISO 2492:1974 Thin taper keys with or without gib head and their corresponding keyways (Dimensions in millimetres) $26.00.
DIN 6885/1 :- Definition
Drive Type Fastenings without Taper Action; Parallel Keys, Keyways, Deep Pattern
Metric Keyway Dimensions
| d (from) mm | d (to) mm | bxh | t1 | t2 |
| 6 | 8 | 2x2 | 1.2 | 1 |
| 8 | 10 | 3x3 | 1.8 | 1.4 |
| 10 | 12 | 4x4 | 2.5 | 1.8 |
| 12 | 17 | 5x5 | 3 | 2.3 |
| 17 | 22 | 6x6 | 3.5 | 2.8 |
| 22 | 30 | 8x7 | 4 | 3.3 |
| 30 | 38 | 10x8 | 5 | 3.3 |
| 38 | 44 | 12x8 | 5 | 3.3 |
| 44 | 50 | 14x9 | 5.5 | 3.8 |
| 50 | 58 | 16x10 | 6 | 4.3 |
| 58 | 65 | 18x11 | 7 | 4.4 |
| 65 | 75 | 20x12 | 7.5 | 4.9 |
| 75 | 85 | 22x14 | 9 | 5.4 |
| 85 | 95 | 25x14 | 9 | 5.4 |
| 95 | 110 | 28x16 | 10 | 6.4 |
| 110 | 130 | 32x18 | 11 | 7.4 |
| 130 | 150 | 36x20 | 12 | 8.4 |
| 150 | 170 | 40x22 | 13 | 9.4 |
| 170 | 200 | 45x25 | 15 | 10.4 |
| 200 | 230 | 50x28 | 17 | 11.4 |
| 230 | 260 | 56x32 | 20 | 12.4 |
| 260 | 290 | 63x32 | 20 | 12.4 |
| 290 | 330 | 70x36 | 22 | 14.4 |
| 330 | 380 | 80x40 | 25 | 15.4 |
| 380 | 440 | 90x45 | 28 | 17.4 |
| 440 | 550 | 100x50 | 31 | 19.5 |
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Labels: DIN, Engineering Standards and Codes, feature
