Re: [CAD_CAM_EDM_DRO] Re: cutter or tooth profile for XL series timing belts/pulleys?

Blue,

Thats how I see it too. machine pockets in the gear for the teeth of the belt to ride in. The pitch diameter and resulting blank diameter would be calculated from the center point of the radius of each belt tooth. the diamter of the pulley has little effect on the shape of the belt teeth.

Ron

Blue <jo001k1132@...> wrote:
Hi,

First of all I have not tried this but I have cut a lot of gears using a
home made hob. I did try using a single point cutter and dividing head many
years ago with some success but it wasn't perfect because I didn't get the
radius's right. It did work and is still going strong but it was for a motor
drive and no precision was necessary

Wouldn't the pulleys be treated the same as for involute gears just with a
different pressure angle, I think it would be 50 degrees if memory serves.

The hob acts in the same way as a rack cutter and will cut any size of
wheel. Making the hob is an easy turning/milling job.

Regards,

Terry


| > Does anyone have a drawing of a cutter or tooth profile for XL series
| > timing belts/pulleys? I am hoping to mill up some pulleys in the
| > comming weeks. I have a pulley and a belt in my hands, but if someone
| > has already made up a cutter drawing, it sure would save some work!
| >
| > Thanks
| >
| > Chris
|
| We discussed this a few months ago.
|
| it is not the exact form unless you have one gear.
|
| Each gear tooth will be different on each gear as the total number of
| teeth changes.
|
|
| That said, check the files section.
|
| Alan has a program in a folder
| Timing Belt Pulley - Program to generate Gcode to mill timing belt pulleys
|
| Dave



Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
Moderator: pentam@... indigo_red@... davemucha@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner


Yahoo! Groups Links








[Non-text portions of this message have been removed]