This 0.5 MOD HEDEN Dual-Pin Gear for LM/M21 Motor enables your focus motor to interface with select cinema lenses. Compatible with HEDEN LM/M21 motors, this gear features a secure 2-pin locking mechanism, a 6mm width, and a 35mm diameter.
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Earlier this year I purchased a Heden M21VE dual pin motor and 2 of these gears in different pitches. These additional gears fit a 64 pitch (0.4 MOD) and 48 pitch (0.5 MOD) lens rings. The gear that comes with the motor (0.8 MOD) works with a 32 pitch lens ring. The Heden motors and gears are very convenient in that the different gears can be changed quickly and easily for different pitches on lenses (examples are 32, 48, 64 pitch). They also attach to either side of the motor. Also, make sure you use these with the correct motor. The larger motors require a larger diameter shaft and will not work with these gears. Conversely, the larger shaft dual pin gears will not work with the M21VE motor (I learned this lesson the hard way).