| 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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