HM-4#3B-Z-43: 14T Brass Pinion, Fits Feigao, Walkera & Heli-Max Novus BL Motor Shafts, For 4#3/B/Q, 4G3, 4G6/S, 4#6/S, CB100, Novus 125/FP/CP

Walkera has chosen to install a 12T pinion on their 4G3 motors because of startup problem. When a 14T pinion is installed on the Walkera BL motor, it is still not adequate for a true 3D flight. Turbo Ace 91416 has been designed to overcome this problem. It provides over 100% more lifting power with added thrust and 16T pinion. See video on how the Turbo Ace 91416 performs:

 

The pinion hole size measurement is extremely critical with only .01mm tolerance allowed to fit on a motor shaft. We strongely recommend that all manufacturers test the pinion on all their motors as different brand of micro motor's shaft may vary. This pinion has actually been mounted on the 1.5mm shaft of the Walkera BL main motor, Feigao 12mmx20mm main motor, Losi 10,250kv, 4.5g and 6g outrunner motors so we know you will have a perfect fit. The pinion should also fit other motors with 1.5mm shaft which we have not tested. As an industry standard, the actual shaft size of a 1.5mm motor shaft is actually 1.42mm, similar to a 2x4 wood stud which is only 1-1/2 x 3-1/2. The pinion hole size needs to be .02mm smaller so it should be 1.40mm exactly to fit snuggly. The pitch of this pinion gear is 0.25 modul which matches the Walkera 4#3A, 4#3B, 4#3Q, 4G3, 4G6, 4G6S and Heli-Max Novus 125 FP/CP, Novus FP/CP main gears.

 

 

Specifications

Standard spec for hole size: 1.50mm (Actual pinion center hole size: 1.40mm)

Pitch: 0.25 modul and matches Walkera 4#3A, 4#3B, 4#3Q and 4G3 main gear

Material: Brass

Number of teeth: 14