Обший каталог Yamawa 2016 - 2017 - страница 815

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15. Bored hole size before tapping ( for thread cutting ) ■ for Whitworth Threads ■ for Sewing Machine Threads Production data Unit : mm Unit : mm Minor diameter of internal threads (D1) Bored hole size Size Minor diameter of internal threads (D1) Bored hole size Size ( ref.) Max. Min. ( ref.) 2.53 1/16 SM 80 1.281 1.211 1.26 3.66 5/64 SM 64 1.593 1.513 1.57 5.13 3/32 SM 56 1.936 1.841 1.91 6.59 3/32 SM 100 2.156 2.081 2.14 8.02 1/8 SM 40 2.551 2.421 2.52 9.4 1/8 SM 44 2.605 2.485 2.58 10.7 9/64 SM 40 2.948 2.818 2.92 12.3 11/64 SM 40 3.742 3.612 3.71 13.7 3/16 SM 24 3.658 3.498 3.62 16.6 3/16 SM 28 3.844 3.684 3.80 19.5 3/16 SM 32 3.980 3.820 3.94 22.3 3/16 SM 40 4.138 4.008 4.11 • D1: Minor diameter of JIS Class 2 internal thread. 7/32 SM 32 4.774 4.614 4.73 • Whitworth Threads have been eliminated from JIS. • Marked sizes are in accordance with BSW. 15/64 SM 28 5.055 4.875 5.01 1/4 SM 24 5.266 5.086 5.22 1/4 SM 40 5.726 5.596 5.69 ■ for Pipe Threads Rp(=PS) Unit : mm G(=PF) Unit : mm Size Minor Diameter of JIS internal thread (D1) Bored hole size Size Minor Diameter of JIS internal thread (D1) Bored hole size ( ref.) ( ref.) Rp 6.50 G 6.77 Rp 8.50 G 8.78 Rp 11.30 G 11.78 Rp 14.90 G 15.28 Rp 18.5 G 19.0 Rp 24.0 G 21.0 Rp 30.2 G 24.5 Rp 38.8 G 28.3 Rp 44.7 G 30.8 Rp 56.5 G 35.4 G 39.4 G 45.3 G 51.3 G 57.1 Information Technical Technical-40 811