Page:Practical Treatise on Milling and Milling Machines.djvu/256

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LEADS FROM .000 to .150

Approximate Lead	Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.		Gear on Worm	1st On Stud	2nd On Stud	Gear on Screw	Angle to Set Spiral Head		Angle to Set Vertical Att.
	24	88	24	100	degrees				24	88	28	100	degrees				24	88	32	100	degrees				24	72	28	100	degrees				24	72	32	88	degrees				24	72	40	100	degrees				24	48	28	100	degrees				24	64	40	100	degrees
.000-05	.0029					¼	89	¾	.0034					¼	89	¾	.0039					¼	89	½	.0047					¼	89	¾
.001-10	.0088					¾	89	¼	.0068					½	89	½	.0078					½	89	½	.0095					½	89	½	.0054					¼	89	¾	.0058					¼	89	¾	.0061					¼	89	¾	.0065					¼	89	¾
.010-15	.0117				1		89		.0102					¾	89	¼	.0117					¾	89	¼	.0142					¾	89	¼	.0108					½	89	½	.0116					½	89	½	.0122					½	89	½	.131					89	½
.015-20	.0175				1	½	88	½	.0170				1	¼	88	¾	.0189				1		89		.0162					¾	89	¼	.0174					¾	89	¼	.0183					¾	89	¼	.0196					¾	89	¼
.020-25	.0234				2		88		.0205				1	½	88	½	.0234				1	½	88	½	.0237				1	¼	88	¼	.0216				1		89		.0233				1		89		.0244				1		89
0.025-30	.0263				2	¼	87	¾	.0273				2		88		.0273				1	¾	88	¼	.0284				1	½	88	½	.0271				1	¼	88	¾	.0291				1	¼	88	¾
0.030-35	.0321				2	¾	87	¼	.0341				2	½	87	½	.0312				2		88		.0331				1	¾	88	¾	.0327				1	½	88	½	.0349				1	½	88	½	.0305				1	¼	88	¾	.0327				1	¼	88	¾
0.35-40	0.351				3		87		0.375				23	¾	87	¼	0.390				2	½	87	½	.0379				2		89		.0379				1	¾	88	¼
0.40-45	.0409				3	½	86	½	.0443				3	¼	86	¾	.0428				2	¾	87	¼	.0426				2	¼	87	¾	.0433				2		88		.0407				1	¾	88	¼	.0428				1	¾	88
.045-50	.0497				4	¼	85	¾	.0477				3	½	86	½	.0467				3		87		.0473				2	½	87	½	.0487				2	¼	87	¾	.0465				2		88		.0489				2		88		.0458				1	¾	88	¼