Performance
Gearbox products
 20
gearbox |
firewall
mount |
flush
mount |
parts |
Inner Demon Gearboxes |
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28
gearbox |
Rotating case
mount |
accessories |
Typhoon mount |
Spurs |
"MADE IN THE USA"
Designed for 20mm diameter motors. (motor mounting holes at 16mm center to center)
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Features |
Includes |
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| *Case made from 6061T-6 aircraft grade aluminum | *gearbox with spur gear installed | |
| *Comes with Cobri 4mm 17/4 heat treated stainless steel shaft | *pinion gear | |
| *Currently comes in two colors | *motor mounting screws | |
| *Has larger flanged bearings | *4mm Collet style prop adapter | |
| *Over 70 gear ratios | *flanged / shielded ball bearing |
| Spur gear tooth count | |||||||||
| Pinion gear tooth count |
68T | 70T | 72T | 74T | 76T | 80T | |||
| 9T | 7.56 | 7.78 | 8.00 | 8.22 | 8.44 | 8.89 | |||
| 10T | 6.80 | 7.00 | 7.20 | 7.40 | 7.60 | 8.00 | |||
| 11T | 6.18 | 6.36 | 6.55 | 6.73 | 6.91 | 7.28 | |||
| 12T | 5.67 | 5.83 | 6.00 | 6.17 | 6.33 | 6.67 | |||
| 13T | 5.23 | 5.38 | 5.54 | 5.69 | 5.85 | 6.16 | |||
| 14T | 4.86 | 5.00 | 5.14 | 5.29 | 5.43 | 5.72 | |||
| 15T | 4.53 | 4.67 | 4.80 | 4.93 | 5.07 | 5.34 | |||
| 16T | 4.25 | 4.38 | 4.50 | 4.63 | 4.75 | 5.00 | |||
| 17T | 4.00 | 4.12 | 4.24 | 4.35 | 4.47 | 4.71 | |||
| 18T | 3.78 | 3.89 | 4.00 | 4.11 | 4.22 | 4.45 | |||
| 19T | 3.58 | 3.68 | 3.79 | 3.89 | 4.00 | 4.21 | |||
| 20T | 3.40 | 3.50 | 3.60 | 3.70 | 3.80 | 4.00 | |||
| 21T | 3.24 | 3.34 | 3.43 | 3.53 | 3.62 | na | |||
| 22T | 3.09 | 3.19 | 3.28 | 3.37 | 3.46 | na | |||
| 23T | 2.96 | 3.05 | 3.13 | 3.22 | 3.31 | na | |||
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Single Spur set-up $29.95
SS Pinion gears are slip fit and need Green locktite
Refer to chart for
gear Ratios. |
in stock |
Designed for 28mm diameter motors. (motor mounting holes are 19mm center to center)
| Spur gear tooth count | |||||||||
| Pinion gear tooth count |
68T | 70T | 72T | 74T | 76T | 80T | |||
| 13T | 6.16 | ||||||||
| 14T | 5.72 | ||||||||
| 15T | 5.34 | ||||||||
| 16T | 4.75 | 5.00 | |||||||
| 18T | 4.11 | 4.22 | 4.45 | ||||||
| 20T | 3.60 | 3.70 | 3.80 | 4.00 | |||||
| 22T | 3.19 | 3.28 | 3.37 | 3.46 | |||||
| 24T | 2.83 | 2.92 | 3.0 | 3.08 | 3.17 | ||||
| 26T | 2.62 | 2.69 | 2.77 | ||||||
| 28T | 2.43 | 2.5 | |||||||
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Single Spur set-up $29.95
Pinion gears are slip fit and need Green locktite Refer to chart for gear Ratios. |
Cobri flush mounts are made from a solid piece of 6061 aircraft aluminum and anodized purple. The adapter is machined within a strict tolerances so the fit between the gearbox and mounting plate is very solid. The flush mount comes with a self threading stainless steel screw so all that is necessary is to drill a 3/32 hole on the top or side (depending on your mounting situation) and tap in the provide screw.
The flush mount fits the Cobri 20 or 28, but all will work with GWS 300-350-400 gearboxes. This is a great application for those of us who have worn out the stock stick mount. All you need to do is glue on a light ply firewall and mount the adapter to the wall.
$ 7.95
Free Shipping
Cobri firewall mounting system
Complete mounting systems including cobri 28 can be purchased. Distance from firewall to prop back plate must be specified within 1/4 inch.
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Complete system including Cobri 28 |
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Cobri firewall mount tube with foot |
Cobri Rotating Case mounts are made from a solid piece of 6061 aircraft aluminum and available in silver and gold. The motor mount is machined within a strict tolerances so the fit between the stick / adapter and mounting plate is very solid.
The Rotating Case mount fits the Aurora, Mega and other motors with 19mm bolt pattern. This is a great application for those of us who have stock stick mount and want the convenience of direct drive.
$ 9.50 silver FREE SHIPPING
Shims
300 &
400 shims have been machined to "press" into GWS 300c, 350c,400c and MPjet 280/300/400 gearboxes. No glue is need to secure the shim in place. We have manufactured the shims so Himax (or any 20mm motor) will slip fit into the shim and be secured by two screws into the front of the motor.300 shim $4.50
NO
SHIPPING CHARGE
400 shim $ 4.95
Shafts
Cobri 20/28 replacement SHAFT $ 8.75
(free shipping)
Cobri 20/28 bearings (2) $ 1.25
Cobri 20 case $ 9.75
Cobri 28 case $ 9.75
Cobri washer E-clip set (washer and E-clip) $ 3.50
Adapter plate for Mega 22
series motors $14.00
Good up to 650 watts
Inner Demon 48 Gearboxes
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set-up $89.95 Gear Ratio: |
in stock |
Good up to 1800 watts
Inner Demon 32 Gearboxes
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set-up $145.95 Gear Ratio: |
in stock
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Good up to 3000 watts
Pinion Gears (Free Shipping)
Some Pinion gears are slip fit and need Green locktite
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All pinions below are 64 pitch |
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2mm Brass |
2mm Stainless Steel |
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2.3mm Brass |
2.3mm Stainless Steel |
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3.0mm Brass |
3.0mm Stainless steel |
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3.17mm (1/8)Brass |
3.17mm (1/8) stainless steel |
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International Shipping Due to flat envelope shipping rate |
$5.00 |
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Spur Gears (Free Shipping)
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4mm Spur Gears |
Lock Tite 620 (green)
FREE Shippimg
