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Search: Posts Made By: Gerald D
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 27 February 2008, 21:56
Replies: 15
Views: 12,264
Posted By Gerald D
Eloid, a 12 pitch gear with a diameter of 1" will...

Eloid, a 12 pitch gear with a diameter of 1" will have 12 teeth.

A tooth count of less than 20 makes for a rough running gear. That is just the way it is. Make the rack too big and the pitch...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 06 October 2007, 23:46
Replies: 15
Views: 12,264
Posted By Gerald D
Dave, what would be your choice of pinion for a...

Dave, what would be your choice of pinion for a direct drive motor? Not a theoretical choice - something readily available from a catalog. Remember, we want enough cutting force, so the pitch...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 06 October 2007, 08:52
Replies: 15
Views: 12,264
Posted By Gerald D
Gents, lets not forget this is (was) Stefan's...

Gents, lets not forget this is (was) Stefan's thread. He said at the beginning he has motors "KL34H280-45-4A (http://www.kelinginc.net/KL34H280_45_4A.pdf) from Kelling (620 oz 4V 4.5Amp)". If he...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 05 October 2007, 12:22
Replies: 15
Views: 12,264
Posted By Gerald D
Dave, you are causing lots of confusion. The...

Dave, you are causing lots of confusion. The reason for the small gear size on a direct driven motor is to get TORQUE. Bigger is smoother, yes, but they don't give the torque to drive the machine.
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 04 October 2007, 20:45
Replies: 15
Views: 12,264
Posted By Gerald D
Driller, it was your comment "using 20 pitch...

Driller, it was your comment "using 20 pitch gears and a 20 tooth spur gear might be a little rough. going to a 30 or 32 or so will be noticeably smoother." that led to the confusion. Can you help to...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 04 October 2007, 07:34
Replies: 15
Views: 12,264
Posted By Gerald D
What is a "30 rack"?

What is a "30 rack"?
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