Current Gear Set
	48T 	driver
	127T	intermediate double gear (connected together)
	120T	intermediate double gear (connected together)
	24T	driven

Leadscrew: Imperial 8TPI Pitch 3.175

Backgound
---------------
Lathe Dials (internal gearing to headstock), where  O  represents a lathe selector dial

		O			O
positions		1, 2, 3, 4, 5		M, S

		O			O
positions		A, B, C, D, E		I, II


1. Where you see --- means Z axis travel along the leadscrew or saddle travel
2. Where you see  |   means X axis travel along the compound bed

Revs / mm							
Position				E2	E3	E4	B2	B3	C3	C4	A1
	48T	SII	---	1.291	1.107	0.996	0.922	0.830	0.738	0.711	0.632
	127T		|	0.331	0.283	0.256	0.236	0.212	0.190	0.182	0.162

120T		S1	---	0.646	0.553	0.498	0.461	0.415	0.369	0.356	0.316
24T			|	0.166	0.142	0.128	0.118	0.106	0.095	0.091	0.081

	24T	SII	---	0.323	0.277	0.249	0.230	0.208	0.184	0.178	0.158
	127T		|	0.083	0.071	0.064	0.059	0.053	0.047	0.046	0.041

120T		S1	---	0.161	0.138	0.125	0.115	0.104	0.092	0.089	0.079
48T			|	0.041	0.035	0.032	0.030	0.027	0.024	0.023	0.020



Revs / inch							
Position				E2	E3	E4	B2	B3	C3	C4	A1
	48T	SII	---	0.054	0.046	0.042	0.038	0.035	0.031	0.030	0.026
		...	|	0.014	0.013	0.011	0.010	0.009	0.008	0.008	0.007
		S1	---	0.027	0.023	0.021	0.019	0.017	0.015	0.015	0.013
	24T	...	|	0.007	0.006	0.006	0.005	0.005	0.004	0.004	0.003

	24T	SII	---	0.013	0.012	0.010	0.010	0.009	0.008	0.007	0.007
		...	|	0.003	0.003	0.003	0.003	0.003	0.002	0.002	0.002
		S1	---	0.006	0.006	0.005	0.005	0.004	0.004	0.004	0.003
	48T	...	|	0.002	0.002	0.002	0.001	0.001	0.001	0.001	0.001



THREADS METRIC PITCHES MM											
Position				D4	C4	C3	C2	A4	B2	E4	A2	E2
	24T	MI		0.400	0.450	0.500	0.563	0.600	0.625	0.700	0.750	0.875
	127T											
	120T	MII		0.800	0.900	1.000	1.125	1.200	1.250	1.400	1.500	1.750
	48T											

	48T	MI		1.600	1.800	2.000	2.250	2.400	2.500	2.800	3.000	3.500
	127T											
	120T	MII		3.200	3.600	4.000	4.500	4.800	5.000	5.600	6.000	7.000
	24T											


Todate I have tested and confirmed that with the gear setup of 
48T
127T
120T
24T
that 5, 7, 10, 15 THREADS IMPERIAL PITCHES 1/INCH cut correctly.
that 1.600, 2.800, 3.600, 7.000 THREADS METRIC PITCHES MM cut correctly.


THREADS IMPERIAL PITCHES 1/INCH											
Position				A2	A3	C3	A4	C3	C3	C3	A1	D4
	48T	Z		24	24	38	24	22	24	26	24	24
		MII		4	4 1/2	9 1/2	5	5 1/2	6	6 1/2	7	7 1/2
	Z	MI		8	9	19	10	11	12	13	14	15

	24T	Z		48	48	38	48	44	48	52	48	48
		MII		16	18	19	20	22	24	26	28	30
	Z	MI		32	36	38	40	44	48	52	56	60


3. Where you see  "" means any point on the thread chasing dial


INDICATOR TABLE					
	1/inch	4	4 1/2	5	6	7
	scale	1-8	1	1x5	1x3x5x7	1x5
	1/inch	8	9	10	11	12
	scale	""	1x5	1x3x5x7	1x5	1-8
	1/inch	13	14	15	16	18
	scale	1x5	1x3x5x7	1x5	""	1x3x5x7
	1/inch	19	20	22	24	28
	scale	1x5	1-8	1x3x5x7	""	1x3x5x7