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#Post#: 7613--------------------------------------------------
Safe-D-Speeder planetary gear?
By: Jimr1999 Date: September 18, 2022, 3:37 am
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Morning all,
what is the group think about using this...
HTML https://youtube.com/shorts/NeDLL8bByWY
In line in the steering column with a pitman arm steering set up
to reduce effort. It has a four to one ratio so would give about
one and a half turns lock to lock.
I do not intend to use this if the Pitman arm set up is to my
liking when I manage to get some track time, but it is another
option other than using a rack?
The Safe-D-Speeder was a thing before variable speed drills to
use with masonry bits at lower speed and higher torque.
Answers and thoughts please.
#Post#: 7616--------------------------------------------------
Re: Safe-D-Speeder planetary gear?
By: synthpunk Date: September 18, 2022, 12:50 pm
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Hmmmmmm! I’m sure I’ve got one of those tucked away somewhere
that came from a house clearance of a retired craft teacher… I
don’t think I’ve ever taken more than a cursory look at it. Time
to go digging in the shed…
#Post#: 7617--------------------------------------------------
Re: Safe-D-Speeder planetary gear?
By: StefanN Date: September 19, 2022, 1:03 am
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I’ve been thinking along similar lines ever since I saw Chris
Slade’s ingenious steering reduction gear. I had a broken
cordless drill and dismantled the epicyclic gearbox at the front
of that to see if it could be repurposed, but, the ratio is too
high and I’m not sure it would be strong enough (and can only
guesstimate the forces involved).
My target ratio is 2:1 and that’s hard to achieve with a compact
epicyclic gearbox. I stumbled upon these:
HTML https://www.qspproducts.nl/en/qs-quickner-1-2/QS-QUICKNER-1-2-Steering-rack-quickener-1-2-ratio-qsp-products<br
/>which seem ideal although new, the cost is prohibitive.
I guess you could use a higher ratio gear but then lengthen the
pitman arm to reduce the number of turns lock to lock.
I’ll follow you’re experimenting with interest.
#Post#: 7626--------------------------------------------------
Re: Safe-D-Speeder planetary gear?
By: Ian F Date: September 20, 2022, 7:12 am
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If your looking for a 2:1 ratio then many years ago I saw a
short oval racer that had two parallel steering columns with one
driving the other via a timing chain and cam / cranks gears
which are 2:1.
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