Lance be careful that the splined o/p shaft has not been distorted by the
welding the bevel gear fits with a very fine tolerance. My bevel gear was
rusted on so I ended up cutting it off removing the splined shaft and re
designing the o/p with a concealed bearing and a steel bar for the main o/p
shaft complete with its own key way. You might want to consider doing
something similar because the o/p bearing is prone to rusting up. GL Clive
GM3POI ex G3POI
----- Original Message -----
From: "Mel Farrer" <mfarrer@tality.com>
To: <w7gj@bigskyspaces.com>; "Tower Talk Reflector"
<towertalk@contesting.com>
Sent: Thursday, August 23, 2001 7:49 PM
Subject: RE: [TowerTalk] Prop Pitch Bevel Gear
>
> I found a 3/4" pitch chain drive sprocket for the PP and another for the
> mast then side mounted the PP and used a stainless chain to drive. Worked
> great. Caution, don't let it have any slack in the chain.
>
> -----Original Message-----
> From: Lance Collister [mailto:w7gj@bigskyspaces.com]
> Sent: Thursday, August 23, 2001 12:30 PM
> To: Tower Talk Reflector
> Subject: [TowerTalk] Prop Pitch Bevel Gear
>
>
>
> I have a medium size prop pitch (about 9" or 10" in diameter) with a 4"
> diameter (to
> the outside of the splines) splined output drive cylinder with 40
> teeth/splines. The
> beveled gear that normally fits over this splined drive cylinder has been
> removed.
> Because a pipe fitting has been welded into the hollow middle of the drive
> cylinder,
> I am unable to insert a standard M2 mast clamping assembly into the INSIDE
> space of
> the drive cylinder.
>
> So...my next option is to try to find a bevel gear fitting that will key
> into the
> splines around the OUTSIDE of the 4" diameter drive cylinder. (It is my
> understanding that the typical prop pitch bevel gears are at the top of a
> sleeve
> that fits down over the vertical splines of such a drive shaft.) Then I
can
> weld a
> plate to the top of that fitting, and install mast clamps onto that.
Since
> I am
> turning a 6m EME array with this motor, I want to make sure I have as good
a
> grip on
> the mast as possible, which is why I am trying to solve the problem with a
> secure
> clamping system solidly anchored to the motor, rather than just using a
bolt
> through
> the mast and plumbing fitting (as it appears some folks with smaller
> antennas have
> done successfully in the past).
>
> If anyone has an unused bevel gear fitting from such a prop pitch, I sure
> would
> appreciate hearing from you! MNI TNX and 73, Lance
>
> Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8)
> P.O. Box 73
> Frenchtown, MT 59834 USA
> QTH: DN27UB
> TEL: (406) 626-5728 FAX:(406) 728-6320
> URL: http://www.bigskyspaces.com/w7gj
>
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> supporting towers up to 96 feet for under $1500!!
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>
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>
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