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Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Thu 02 December 2010, 22:27
Replies: 81
Views: 122,524
Posted By Gerald D
Asif, I have retired from the MechMate project. I...

Asif, I have retired from the MechMate project. I will mostly avoid direct questions. Sorry, but I cannot spend the time to check everybody's catalogues.
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 30 December 2009, 10:25
Replies: 81
Views: 122,524
Posted By Gerald D
From another post:

From another post:
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 21 March 2009, 23:22
Replies: 81
Views: 122,524
Posted By Gerald D
Look at the diameter of the driving pinion when...

Look at the diameter of the driving pinion when you use 1/2" pitch . . . . where will you find the torque, or space to turn that 3" diameter monster?
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 21 March 2009, 13:41
Replies: 81
Views: 122,524
Posted By Gerald D
Half inch pitch teeth will definitely not work....

Half inch pitch teeth will definitely not work. Nema 23's are also dodgy (even with 3-4mm pitch rack).
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 10 February 2009, 21:52
Replies: 81
Views: 122,524
Posted By Gerald D
Hi Martin, 35 teeth metric module 1 is a good...

Hi Martin, 35 teeth metric module 1 is a good choice. If the pinions are quite cheap, I suggest you get some 25 teeth pinions as well. Then you can choose according to the materials you cut, speeds...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 12 November 2008, 23:16
Replies: 81
Views: 122,524
Posted By Gerald D
Not even one MM in Australia comes to mind now -...

Not even one MM in Australia comes to mind now - maybe everyone is waiting for you to bring down the prices of the imported components? :)
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 12 November 2008, 21:52
Replies: 81
Views: 122,524
Posted By Gerald D
I think the solution is staring you in the face ....

I think the solution is staring you in the face . . . . . become a rack importer/distributor and get rich quick! :)

Would be very interested to hear what the Italians will quote you to send 10...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Tue 11 November 2008, 22:31
Replies: 81
Views: 122,524
Posted By Gerald D
Ed & Jason, I may have some news for you . . . . ...

Ed & Jason, I may have some news for you . . . .

The racks we use here Cape Town are actually imported from Italy. I asked the Italian company if they have a stockist of our typical size/spec in...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 10 November 2008, 08:37
Replies: 81
Views: 122,524
Posted By Gerald D
Ed and Jayson, see this post...

Ed and Jayson, see this post (http://www.mechmate.com/forums/showthread.php?p=17139&postcount=1).
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 20 August 2008, 20:51
Replies: 81
Views: 122,524
Posted By Gerald D
David, I think your machine will run pretty well...

David, I think your machine will run pretty well with that module 1.5 rack/pinion. Anything less than 20 teeth starts getting a bit rough.

Most of us are using around 30 teeth, and we then have...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 16 August 2008, 21:17
Replies: 81
Views: 122,524
Posted By Gerald D
Your gear pitch is definitely metric module 1.5....

Your gear pitch is definitely metric module 1.5. In the spreadsheet (Gear Speed Steps Freq Calculator.xls) you downloaded, change Module Number to 1.5. It should work quite well.
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 16 August 2008, 15:05
Replies: 81
Views: 122,524
Posted By Gerald D
That could be a metric module 1.5 with the rack...

That could be a metric module 1.5 with the rack being 17 x 17mm?
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 16 August 2008, 15:03
Replies: 81
Views: 122,524
Posted By Gerald D
Before we guess which gear that is, how wide and...

Before we guess which gear that is, how wide and tall is the rack?
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 09 August 2008, 09:37
Replies: 81
Views: 122,524
Posted By Gerald D
Technisales or Nusaf (Nusaf can get 2meter rack...

Technisales or Nusaf (Nusaf can get 2meter rack lengths)

For module 1 metric, the smallest practical pinion is 24 tooth to fit on a 12mm shaft end.

4:1 belt reduction will work well.
...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 23 January 2008, 09:35
Replies: 81
Views: 122,524
Posted By Gerald D
The recommended gears for those motors, using the...

The recommended gears for those motors, using the metric system, is for all 4 pinion gears to be 36 tooth, module 1. (There is no reason for the Z to have a smaller gear. Module 1.5 gear will not run...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 23 January 2008, 08:29
Replies: 81
Views: 122,524
Posted By Gerald D
Sharma, there is something wrong with the teeth...

Sharma, there is something wrong with the teeth numbers and modules in your list. But, let us start at the beginning,......what motors are you using? Direct drive?
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