"Long Shank Pinions" still too short

[teknorc]

Originally Posted by himalaya

I have a Tekno Conversion Kit for 8-T. I prefer direct motor drive than the clutch. But I found my motor seems too far apart to the spur, even I have bought optional "long shank" pinions and "motor plate for long shank pinion". I have to pull the pinion out for a few mm to make the pinion have good couple to the spur, and thus the outter set screw(the one near the teeth) is completely loose, no use at all, only one set screw is actually tightenning the pinion to the motor shaft.

I tried Novak HVpro, Feigao XL, Align 600XL and many other motors, all the same, they use a standard shaft length of 16mm.

For stock mod 1 pinions from Robinson or Novak, no way, they are just too short to touch the spur!

So my questions are,
Is there any way I can move my motor a few mm closer to the spur?
Would Tekno have a "LONGER shank pinion" coming out for those using standard motors? or at least
Does Tekno recommend any other motors that have longer shaft ?

For future coming kits, would Tekno make more choices for customers to choose from? such as a kit includes NO clutch, and move the motor mount holes forward for 10~20mm so that I can use standard stock pinions.......

Thanx.

Hello,

Strange, this is the first we've heard of this. Either way, one set screw will still work fine especially considering the tight fit (close tolerances) on the pinion gears. The clutch assembly is longer and heavier and only uses one set screw without any issues. I'm pretty sure the Neu and Medusa motors have slightly longer shafts (19mm-20mm).

[Semi Pro]

Originally Posted by teknorc

Hello,

Strange, this is the first we've heard of this. Either way, one set screw will still work fine especially considering the tight fit (close tolerances) on the pinion gears. The clutch assembly is longer and heavier and only uses one set screw without any issues. I'm pretty sure the Neu and Medusa motors have slightly longer shafts (19mm-20mm).

dont you feal that extending the pinion out that far will put alot of stress on the front motor bearing?

and lead to failure?

[MetalMan]

Originally Posted by Semi Pro

dont you feal that extending the pinion out that far will put alot of stress on the front motor bearing?

and lead to failure?

That's what I was gonna say... I can forsee some extremely fast-wearing front motor bearings with a long-shank pinion that's hardly attached. Not to mention greater wear on gears as a result of more flex between the pinion/spur.

[teknorc]

Originally Posted by Semi Pro

dont you feal that extending the pinion out that far will put alot of stress on the front motor bearing?

and lead to failure?

As mentioned in the earlier post, the Elektri-Clutch sits out even further and we have yet to wear out any bearings prematurely. As long as your mesh is set correctly, the long shank pinions will work fine. There are many people running the long shank pinions without issues.

We thought about making a separate conversion for use with standard pinions, but it is simply too costly to offer all of the variations. The current design accommodates clutch or direct drive while allowing us to offer the conversions (with a complete chassis) for a very reasonable price.