Page 314 - Mechanical Engineer's Data Handbook

302 MECHANICAL ENGINEER’S DATA HANDBOOK

BSP pipe threads (BS 2779: 1973) - Whitwortb thread form (continued)
Nominal size Threads per Pitch Major diameter Minor diameter
(in.) inch (mm) (mm) (mm)
1) 11 2.309 47.803 44.845
1; 11 2.309 53.746 50.788
2 11 2.309 59.614 56.656
2: 11 2.309 65.710 62.752
2) 11 2.309 75.189 72.226
2: 11 2.309 81.534 78.576
3 11 2.309 87.884 84.926
3) 11 2.309 100.330 97.372
4 11 2.309 113.030 110.072
4) 11 2.309 125.73 122.772
5 11 2.309 138.43 135.472
5) 11 2.309 151.13 148.172
6 11 2.309 163.83 160.372

8.2.9 Rectangular BS keys
Dimensions (mm)

Shaft Depth in Depth in Radius, r
diameter, Key shaft, hub,
D bxd dl d2 Max. Min.
6-8 2x2 1.2 1 0.16 0.08
8-10 3x3 1.8 1.4 0.16 0.08
10-12 4x4 2.5 1.8 0.16 0.08
12-17 5x5 3 2.3 0.25 0.16
17-22 6x6 3.5 2.8 0.25 0.16
22-30 8x7 4 3.3 0.25 0.16
30-38 10x8 5 3.3 0.40 0.25
384 12x8 5 3.3 0.40 0.25
4450 14x9 5.5 3.8 0.40 0.25
50-58 16x 10 6 4.3 0.40 0.25
58-65 18 x 11 7 4.4 0.40 0.25
65-75 20x 12 7.5 4.9 0.60 0.40
75-85 22 x 14 9 5.4 0.60 0.40
85-95 25 x 14 9 5.4 0.60 0.40
95-1 10 28x 16 10 6.4 0.60 0.40
110-130 32 x 18 11 7.4 0.60 0.40
130-150 36 x 20 12 8.4 1 .00 0.70
150-170 40x22 13 9.4 1 .00 0.70
170-200 45 x 25 15 10.4 1 .OO 0.70
200-230 50 x 28 17 11.4 1 .OO 0.70
230-260 56 x 32 20 12.4 1.60 1.20
260-290 63 x 32 20 12.4 1.60 1.20
290-330 70 x 36 22 14.4 1.60 1.20
330-380 80x40 25 15.4 2.50 2.00
38W 90x45 28 17.4 2.50 2.00
440-500 100 x 50 31 19.5 2.50 2.00