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螺丝规格_齿轮 1 ���� (1) �� M 8 ×××× 1.25 (2) �� 1/2” - 13 UNC UNF : �� UNEF : ��� �� ��� � ��,��� ��� ��� 13 �/� 2 �� �� 1,2...

螺丝规格_齿轮
1 ���� (1) �� M 8 ×××× 1.25 (2) �� 1/2” - 13 UNC UNF : �� UNEF : ��� �� ��� � ��,��� ��� ��� 13 �/� 2 �� �� 1,2,3 � (1) � �� (�� 6-7�) (2) � �� (�� 3-4�) (3) � �� (�� 1-2�) [���� 1] �M 12×1.75 � !"�� #$? Sol. D = 12-1.75 =10.25 (mm) [���� 2] �� 1/2” – 13 UNC � !"�� # $? Sol. D = (1/2)” – (1/13)”=(11/26)” (Note) 1. � �%&'()'*+,- 2. ��./ 1/2 01/ 1/4 0- 3. �2�%3*4��56- 4. �7�%&*�� 1,2 3 �- * ��89:(B);��<=>?@A�- A B 3 � (1) BCBCBCBC α= T/2 × 57.3° 1:5 α= (1/5)/2 ×57.3° = 5.73° (α: DE�) T= (D-d)/L α=tan-1 (T/2) (2) FGHE=GIJKFGHE=GIJKFGHE=GIJKFGHE=GIJK 1:5 Tan α = [(D-d)/2]/L α=Tan –1T/2 =(T/2) × 57.3° D d L D d L α LMNO 10 1 102+12 4 �� � 1. PQMRS 2. TRUVS 3. 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