Spur Gear

Spur Gear Profile

(1) : Pitch diameter (PCD): The diameter of the pitch circle, the key reference for gear size and speed.
(2) : Outside diameter (OD): The major diameter of the gear.
(3) : Base circle diameter (BD): The theoretical circle from which the involute tooth profile is generated.
(4) : Root (or dedendum) diameter (ID): The minor diameter of the tooth.
(5) : Pressure angle (α): The angle between the line of action and the line normal to the gear centers, defining force transmission in meshing gears.
(6) : Tooth circular thickness (Sw): The thickness of the tooth at the pitch circle.
(7) : Addendum (a): The tooth height above the pitch circle.
(8) : Dedendum (d): The tooth depth below the pitch circle down to the minor diameter.
(9) : Working depth (Hw): The depth a gear tooth penetrates into the mating gear space during engagement.
(10) : Whole depth (H): The total tooth height from the major diameter down to the minor diameter.
(11) : Clearance (C): The space between a gear’s minor diameter and the mating gear’s major diameter.
(12) : Module (m): The ratio of pitch diameter to number of teeth (mm per tooth).
(13) : Diametral pitch (DP): Number of gear teeth per inch of pitch diameter.
(14) : Number of teeth Z: the total count of gear teeth around its pitch circle. It determines the gear ratio, module, and meshing capability.

Profile Calculation

Diametral pitch :

DP =

0.000

mm

Pitch diameter :

PCD =

0.000

mm

Outside diameter :

OD =

0.000

mm

Base diameter :

BD =

0.000

mm

Root diameter :

ID =

0.000

mm

Circular tooth thickness :

Sw =

0.000

mm

Addedum :

a =

0.000

mm

Dededum :

d =

0.000

mm

Working depth :

Hw =

0.000

mm

Whole depth :

H =

0.000

mm

Clearance :

C =

0.000

mm

Standard Spur Gear

Z\m	1	1.5	2	2.5	3	4	5	6
12	12	18.0	24	30	36	48	60	72
13	13	19.5	26	32.5	39	52	65	78
14	14	21.0	28	35	42	56	70
15	15	22.5	30	37.5	45	60	75	90
16	16	24.0	32	40	48	64	80	96
17	17	25.5	34	42.5	51	68	85
18	18	27.0	36	45	54	72	90	108
19	19	28.5	38	47.5	57	76	95
20	20	30.0	40	50	60	80	100	120
21	21	31.5	42	52.5	63	84	105
22	22	33.0	44	55	66	88	110
23	23	34.5	46	57.5	69	92	115
24	24	36.0	48	60	72	96	120	144
25	25	37.5	50	62.5	75	100	125	150
26	26	39.0	52	65	78	104	130
27	27	40.5	54	67.5	81	108	135
28	28	42.0	56	70	84	112	140	168
29	29	43.5	58	72.5	87	116	145
30	30	45.0	60	75	90	120	150	180
31	31	46.5	62	77.5	93	124
32	32	48.0	64	80	96	128	160	192
33	33	49.5	66	82.5	99	132
34	34	51.0	68	85	102	136
35	35	52.5	70	87.5	105	140	175	210
36	36	54.0	72	90	108	144
37	37	55.5	74	92.5	111
38	38	57.0	76	95	114	152	190	228
39	39	58.5	78	97.5	117
40	40	60.0	80	100	120	160	200	240
41	41	61.5	82	102.5	123
42	42	63.0	84	105	126
43	43	64.5	86	107.5	129
44	44	66.0	88	110	132
45	45	67.5	90	112.5	135	180	225
46	46	69.0	92	115	138
47	47	70.5	94	117.5	141
48	48	72.0	96	120	144	192	240
49	49	73.5	98	122.5
50	50	75.0	100	125	150	200	250
51	51	76.5	102	127.5
52	52	78.0	104	130	156	208	260
53	53	79.5	106	132.5
54	54	81.0	108	135
55	55	82.5	110	137.5	165	220	275
56	56	84.0	112	140
57	57	85.5	114	142.5	171	228	285
58	58	87.0	116	145
59	59	88.5	118	147.5
60	60	90.0	120	150	180	240	300
61	61	91.5	122
62	62	93.0	124
63	63	94.5	126
64	64	96.0	128
65	65	97.5	130	162.5	195	260	325
66	66	99.0	132
67	67	100.5	134
68	68	102.0	136
69	69	103.5	138
70	70	105.0	140	175	210	280	350
72	72	108.0	144	180	216
75	75	112.5	150	187.5	225	300	375
76	76	114.0	152	190	228	304	380
80	80	120.0	160	200	240	320	400
85	85	127.5	170	212.5	255	340	425
90	90	135.0	180	225	270	360	450
95	95	142.5	190	237.5	285	380	475
100	100	150.0	200	250	300	400	500
110	110	165.0	220	275	330	440	550
114	114	171.0	228	285	342	456	570
120	120	180.0	240	300	360
127	127	190.5	254	317.5	381

Pitch diameter of standard spur gear