From Manual of Gear Design: Helical and Spiral Gears, Volume III

14 Full Depth Involute System (ASA-B6b-1933)

Table 3: 14 Full Depth Involute System (ASA-B6b-1933)

Table 3: 14 Full Depth Involute System (ASA-B6b-1933), continued

Table 3: 14 Full Depth Involute System (ASA-B6b-1933), continued

Table 3: 14 Full Depth Involute System (ASA-B6b-1933), continued

Table 3: 14 Full Depth Involute System (ASA-B6b-1933), continued

20 Full Depth Involute System (ASA-B6b-1933)

Table 4: 20 Full Depth Involute System (ASA-B6b-1933)

Table 4: 20 Full Depth Involute System (ASA-B6b-1933), continued

Table 4: 20 Full Depth Involute System (ASA-B6b-1933), continued

Small Pinions (5 To 16 Teeth)

WHEN PINIONS WITH SMALL NUMBERS OF TEETH ARE REQUIRED, IT IS NECESSARY TO ENLARGE THEIR DIAMETER TO AVOID EXCESSIVE UNDERCUTTING. THE FOLLOWING EQUATIONS APPLY TO PAIRS OF HELICAL GEARS WHEN THE DRIVING PINION HAS FROM 5 TO 16 TEETH.

WHEN,

  • N 1 = NUMBER OF TEETH IN PINION

  • N 2 = NUMBER OF TEETH IN GEAR

  • C = CENTER DISTANCE

  • P n = NORMAL DIAMETRAL PITCH

  • = CIRCULAR PITCH IN PLANE OF ROTATION

  • ? = HELIX ANGLE AT PITCH LINE

  • R 1 = PITCH RADIUS OF PINION

  • R 2 = PITCH RADIUS OF GEAR

  • R o1 = OUTSIDE RADIUS OF PINION

  • R o2 = OUTSIDE RADIUS OF GEAR

  • R r1 = ROOT RADIUS OF PINION.

  • R r2 = ROOT RADIUS OF GEAR

  • T 1 = ARC TOOTH THICKNESS OF PINION IN PLANE OF ROTATION AT R 1

  • T 2 = ARC TOOTH THICKNESS...

Copyright Earle Buckingham 1999 under license agreement with Books24x7

Products & Services
Rack and Pinion Drives
Rack and pinion drives use a rotational motor to affect linear motion via a rack and pinion combination. They are used frequently in long-travel applications, such as machine tool table positioning, that require high stiffness and accuracy.
Rack and Pinion Gears
Rack and pinion gears are used to convert rotation into linear motion.
Spur Gears

Spur gears are the simplest type of gear. Transmitting power between parallel axes, the teeth project radially on the disc.

Bevel and Miter Gears

Bevel gears are gears designed to transmit motion between intersecting axes. Perpendicular arrangements are most common, but bevel gears can be manufactured for nearly any angle. The teeth bearing surface of the gear, or surface pitch, is conically shaped or tapered. Miter gears are bevel gears manufactured in a 1:1 ratio, with the same number of teeth on mating gears and with perpendicular axes.

Gears

Gears are rotating mechanical devices employing 'teeth' in order to transmit torque between separate axes. Two or more cooperating gears are called a transmission and can produce a mechanical advantage by changing speed, torque or rotation direction.


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