This `70's spinning reel had the spiral-face gears . The diameter of its main-gear was same to MITCHELL 308/408 .
Its spiral angle is 35deg .
External dia : 33.4mm
Internal dia : 28.4mm
Width of teeth : 2.5mm
Teeth : 47T
Face gears 3
The gear of RYOBI Dynafight was same diameter to MITCHELL 308 !
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Gears of RYOBI Dynafight This `70's spinning reel had the spiral-face gears . The diameter of its main-gear was same to MITCHELL 308/408 . |
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Pinion Its spiral angle is 35deg . |
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External diameter is 7.3mm . |
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Main gear External dia : 33.4mm Internal dia : 28.4mm Width of teeth : 2.5mm Teeth : 47T |
Calculation
I calculated the pinion with the soft of Tokyo Denki University machinery infomation system laboratory .
Teeth n = 9
Module m = 0.55 [ mm ]
Dislocation x1 = 0.3
Pressure angle ƒ¿n = 20
Spiral angle ƒÀ = 35
PCD of main gear : 31.557 mm
It doesn't match to I/D ...
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Effective area This gear uses full of the teeth of 2.5mm . It is stronger than dia-cut of 308 which uses only 0.9mm of teeth . Its feeling is not perfect smooth . But it is not so wrong . Its winding is light and high-power . It matched MITCHELL's character . |
Hyoshi-sangyo used this type gears on their salt-water spinning reel .
It has high-efficiency and durability .
I hope MITCHELL to remake 308/408 with this gears . (2004/5/30)
MITCHELL spinning reels