MAIN DRIVE GEAR, 115T, MOD1.0
FOR ALIGN TREX 700 NITRO SERIES HELICOPTERS

Item Number: AT700-MDGM1
Installation Diagram:  CLICK HERE

Price: $32.95
Material: Nylatron Proprietary Type 66 Polyamide
Models: all ALIGN TREX 700N series (replaces stock Align part #HN7019A).  Main Drive Gear can also
be used for all ALIGN TREX 550E (V1/V2), 600E PRO, and  600E/ESP series helicopters with the addition
of the T700 Universal Main Gear Case (AT550/600-UMGC or AT550/600-MGC).

Recommended Accessories:
REVCO MOD1.0 HARDENED STEEL PINION GEAR, 6MM BORE
TREX 550/600 SERIES T700 UNIVERSAL MAIN GEAR CASE
TREX 550/600 SERIES T700 MAIN GEAR CASE

Note: newly improved geometry for 550E and 600E applications when used in conjunction with the KDE Direct TREX
550/600 Series T700 Universal Main Gear Case or the KDE Direct TREX 550/600 Series T700 Main Gear Case.  Check
Installation Diagram for correct installation procedure for optimal strength and longevity.  The new Main Drive Gear is
precision CNC-machined from a proprietary Nylatron MoS2-Filled Type 66 Polyamide, one of the best materials available
today for polymer gears and the perfect match for an extremely strong, smooth running, and durable power transmission
for the TREX 700N/600/550 series helicopters.  The gear is composed of 115 teeth, utilizing the metric MOD1.0 tooth
standard for incredible strength.  Through months of testing, the gear has been optimized to include numerous design
features for optimum performance, including:

(1)  Optimized gear geometry to provide proper clearance and gear mesh for high-strength applications.
(2)  The tooth involute profile has been optimized through numerous design iterations for increased tooth engagement and
strength, providing an incredibly quiet and durable gear for a MOD1.0 power train.
(3)  Weight was reduced through FEA optimizations of the machining pattern to significantly reduce weight, while
maintaining full strength of a solid-gear profile.
(4)  The self-lubricating properties of the proprietary MoS2-Filled Type 66 Polyamide material provides exceptional wear
and noise properties, providing a gear that can withstand the harsh nature of hardcore 3D flight.



















































Includes:  
- One (1) TREX 700 Series Main Drive Gear, 115T, MOD1.0

Finish
:
Precision CNC-machined, Nylatron Proprietary MoS2-Filled Type 66 Polyamide

Weight:  
48 g (design is FEA optimized for maximum strength and minimum weight)


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purchase of $99 or over!  
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an alternate carrier and rates at
sales@kdedirect.com.

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Standard Acetyl
(POM) Resin
Gears
KDE Direct Nylatron
Proprietary MoS2-Filled
Type 66 Polyamide Gears
Design Advantages of the KDE Direct
Main Drive Gear, 115T, MOD1.0
Density
1.41
[g/cc]
1.15
[g/cc]
19% Less Weight
(Reduced Weight to the Helicopter)
Tensile Strength
(Ultimate)
9,500
[psi]
12,500
[psi]
32% Stronger Tooth
(More Power and Torque Capability)
Shear Strength
8,000
[psi]
10,500
[psi]
32% Stronger Tooth Root
(More Power and Torque Capability)
Flexural Yield Strength
12,000
[psi]
17,000
[psi]
42% Stronger Tooth Root
(More Power and Torque Capability)
Coefficient of Friction
0.250
0.200
20% Less Friction
(Less Noise, More Power Transfer)
K (Wear) Factor
200e-10
[in^3-min/lbf-ft-hr]
90e-10
[in^3-min/lbf-ft-hr]
55% Less Wear
(Longer Lasting Gear)