| Gear Cutting
Without Index Plates
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Do accurate gear
cutting (or other circle
dividing) up to 100 teeth (or
divisions) on your rotary
table without use of expensive
index plates. (For the
folks who do not have
computers to do the
calculations!)
Tables
of
direct dial settings
calculated to 18 decimal
places and are accurate to 1
second of arc, which is only
1/3600th degree! There are no
cumulative errors as you cut
gears or divide circles. You
could calculate these
yourself, but for just a 26
tooth gear you will have to
make 78 calculations and hope
that they are all correct!
Degrees, minutes and seconds
are needed for each tooth. If
your rotary table dial doesn't
include seconds, just round
them to the nearest 1/4 or 1/2
degree.
As an example, here are the
dial settings from the table
to cut a 26 tooth gear. Would
you want to use a calculator
to do this?
| Deg. |
Min. |
Sec. |
|
Deg. |
Min. |
Sec. |
|
Deg. |
Min. |
Sec. |
|
13
|
50
|
46
|
|
138
|
27
|
42
|
|
263
|
4
|
37
|
|
27
|
41
|
32
|
|
152
|
18
|
28
|
|
276
|
55
|
23
|
|
41
|
32
|
18
|
|
166
|
9
|
14
|
|
290
|
46
|
9
|
|
55
|
23
|
5
|
|
180
|
0
|
0
|
|
304
|
36
|
55
|
|
69
|
13
|
51
|
|
193
|
50
|
46
|
|
318
|
27
|
42
|
|
83
|
4
|
37
|
|
207
|
41
|
32
|
|
332
|
18
|
28
|
|
96
|
55
|
23
|
|
221
|
32
|
18
|
|
346
|
9
|
14
|
|
110
|
46
|
9
|
|
235
|
23
|
5
|
|
360
|
0
|
0
|
|
124
|
36
|
55
|
|
249
|
13
|
51
|
|
|
|
|
The tables
include the direct dial
settings for every gear from 8
to 100 teeth, plus tables of
gear pitch diameters for 14
pitches in a range from 6 to
120. Also, there are formulas
and examples to calculate
various other aspects of
gears.
Gear tables - 25
pages
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"I remember
seeing your display
at the 1995 NAMES
show and was very
impressed with the
quality of your
plans and designs."
- Michael A. Latcha
(Farmington Hills,
Michigan)
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