Page:Practical Treatise on Milling and Milling Machines.djvu/252

---

TABLE OF LEADS, 42.00″ TO 74.65″

	DRIVEN	DRIVER	DRIVEN	DRIVER
LEAD IN INCHES	GEAR ON WORM	1ST GEAR ON STUD	2nd GEAR ON STUD	GEAR ON SCREW
42.00	72	24	56	40
42.23	86	28	44	32
42.66	100	28	86	72
42.78	56	24	44	24
42.86	100	28	48	40
42.86	72	24	40	28
43.00	86	32	64	40
43.00	86	28	56	40
43.64	72	24	64	44
43.75	100	32	56	40
43.98	86	32	56	40
44.44	64	24	40	32
44.64	100	28	40	32
44.68	86	28	64	44
44.79	86	24	40	32
44.79	86	24	40	32
44.45	100	32	64	44
44.45	100	24	48	44
45.56	100	28	56	44
45.61	86	24	56	44
45.72	64	24	48	28
45.84	100	24	44	40
45.92	100	28	72	56
46.07	86	28	72	48
46.07	86	24	72	56
46.07	86	28	48	32
46.67	64	24	56	32
46.67	56	24	48	32
46.88	100	32	72	48
46.88	100	24	72	64
47.15	72	24	44	28
47.62	100	28	64	48
47.62	100	24	64	56
47.62	100	24	32	28
47.78	86	24	64	48
47.78	86	24	32	24
47.99	100	32	86	56
47.99	100	28	86	64
48.00	72	24	64	40
48.38	86	32	72	40
48.61	100	24	56	48
48.61	100	24	28	44
48.86	100	40	86	44
48.89	64	24	44	24
49.11	100	28	44	32
49.14	86	28	64	40
49.27	86	24	44	32
49.77	100	24	86	72
50.00	100	28	56	40
50.00	72	24	48	40
50.00	100	32	64	40
50.17	86	24	56	40
50.26	86	28	72	44
51.14	100	32	72	44
51.19	86	24	40	28
51.43	72	28	64	32
51.43	72	24	48	28
51.95	100	28	64	44
52.08	100	24	56	32
53.33	64	24	56	28
53.33	64	24	48	24
53.57	100	28	72	48
53.37	100	24	72	56
53.57	100	28	48	32
53.75	86	24	72	48
53.75	86	28	56	32
54.85	100	28	86	56
55.00	72	24	44	24
55.28	86	28	72	40
55.56	100	24	32	24
55.56	100	24	64	48
55.99	100	24	86	64
55.99	100	32	86	48
56.25	100	32	72	40
56.31	86	24	44	28
57.14	100	28	64	40
57.30	100	24	44	32
57.33	86	24	64	40
58.33	100	24	56	40
58.44	100	28	72	44
58.64	86	24	72	44
59.53	100	24	40	28
59.72	86	24	40	24
60.00	72	24	64	32
60.00	72	24	56	28
60.00	72	24	48	24
60.61	100	24	64	44
61.08	100	32	86	44
61.43	86	28	64	32
61.43	86	24	48	28
62.22	64	24	72	48
62.50	100	24	72	48
62.50	100	24	48	32
62.71	86	24	56	32
63.99	100	28	86	48
63.99	100	24	86	56
64.29	100	28	72	40
64.50	86	24	72	40
65.48	100	24	44	28
65.70	86	24	44	24
66.67	100	24	64	40
67.19	100	32	86	40
68.18	100	24	72	44
68.57	72	24	64	28
69.11	86	28	72	32
69.44	100	24	40	24
69.80	100	28	86	44
70.00	72	24	56	24
71.43	100	28	64	32
71.67	86	24	64	32
71.67	86	24	48	24
72.92	100	24	56	32
72.92	100	24	56	32
74.65	100	24	86	48