-
22-03-2012 #31
-
22-03-2012 #32
-
22-03-2012 #33
Yes it's all about teeth in mesh.!! With small pulleys there are less teeth engaged between belt and pulley, less teeth engaged means less able to handle high loads and reduce the amount of torque that can be transmitted and if wrong will rip teeth off the belt.
Read these and it will explain lots. . http://www.roymech.co.uk/Useful_Tables/Drive/Timing_belts.html
http://www.ondrives.com/data/pdf/pul...belts-tech.pdf
-
The Following 2 Users Say Thank You to JAZZCNC For This Useful Post:
-
22-03-2012 #34
Jazz did you hear anything from Chai?
With 6 plastic inserts they must have 6 rows of balls, as each insert is a ball return tube. Additionally they're not going to use 3, or any odd number, rows of balls as that would result in uneven wear and all sorts due to having more balls running in one track...
I wonder if they're preloaded. A twin start screw with offset tracks in the nut is one way to apply preload - that would make them worthwhile.
As a general rule of thumb don't go below a 15T pulley with 5M HTD belts, and if you need much above 3:1 use double reduction. Use one of the many on-line calculators to find the number of teeth in mesh on the smallest pulley. They will give a warning if it is below 5...
http://www.sdp-si.com/cd/default.htm
-
22-03-2012 #35
No not heard anything yet but I only sent email late last night so don't expect too.
It's a flop over type nut so Yes it's 6 rows but 2 x 3 circuits per start. Like this http://motionsystemdesign.com/images...-ballscrew.jpg
Well thats how believe they are setup but I'm not striping it down to findout.:lol:
Yes by the feel of it I do feel that it's slightly preloaded as well.??
-
14-04-2012 #36
Hi Jonathon,
Are these still available.
Dean
-
14-04-2012 #37
-
14-04-2012 #38
And he has the nerve to bad mouth you ?
I'd have scrapped them first................John S -
-
14-04-2012 #39
-
15-04-2012 #40
Thread Information
Users Browsing this Thread
There are currently 2 users browsing this thread. (0 members and 2 guests)
Similar Threads
-
Centec 2 ballscrews
By jonnydeen in forum Lead Screws, Nuts & SupportsReplies: 29Last Post: 11-07-2023, 09:53 AM -
Bended ballscrews. What i can do?
By ba99297 in forum Lead Screws, Nuts & SupportsReplies: 25Last Post: 13-04-2017, 01:41 PM -
Best place to get ballscrews?
By Ross77 in forum Lead Screws, Nuts & SupportsReplies: 6Last Post: 15-04-2013, 10:09 PM -
pictures of ballscrews??
By wilfy in forum Lead Screws, Nuts & SupportsReplies: 2Last Post: 28-10-2012, 09:09 PM -
FOR SALE: RM1610 ballscrews(used + 1605 x 900mm screw (new)
By rbs in forum Items For SaleReplies: 1Last Post: 10-05-2012, 08:23 PM
Bookmarks