540
50 x 20
80 x 25
560
500
50 x 20
80 x 25
480
470
50 x 20
80 x 25
440
370
50 x 20
80 x 25
420
340
50 x 20
80 x 25
360
300
40 x 16
60 x 25
315
250
40 x 16
60 x 25
280
190
40 x 16
50 x 20
215
140
30 x 10
40 x 16
160
Pitch P
d2 x y2
D1 x T1
0
Standard
Inner Spiral
Outer Spiral
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The Spirotech Shaftless Spirals are manufactured from the highest quality High Tensile Steel