Needs Pictures: 0
Results 1 to 9 of 9
Thread: Gear tooth rounding
-
13th Mar 2019, 10:39 PM #1Most Valued Member
- Join Date
- Jul 2016
- Location
- Melbourne
- Age
- 35
- Posts
- 1,522
Gear tooth rounding
I have a gear cluster away being shaped at the moment, is a fairly tight stack of three gears about 1 inch spacing between tooth flanks and the center gear has rounded teeth to aid shifting. (Its from the norton box of a DSG) The gearcutter does not have a tooth rounding machine and their VMC has backlogged work for ages so im going to have to do it either by hand (Unattractive as its tough material and i dont want to scuff all the teeth faces up)
Or look for a manual mill setup. I was thinking of using a dovetail cutter or woodruff cutter to just nip in there on each tooth the only downside is the rounded end would be a flat face rather than smooth curve but i dont see that being a huge problem.
its a cluster of a 26, 24 and 22 tooth 10 Dp gears
-
13th Mar 2019, 11:01 PM #2Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,080
If the 3 gears are separate pieces I can ask about doing it at work, we have a tooth rounding machine. Even if they're assembled we might have something that will get in
-
13th Mar 2019, 11:04 PM #3Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
G/day Ralph, you could grind a form tool out of hss and fly cut the radius, or do it in a shaper
cheers, shed
-
13th Mar 2019, 11:09 PM #4Most Valued Member
- Join Date
- May 2011
- Location
- Murray Bridge S Aust.
- Age
- 71
- Posts
- 5,959
Hi Ralph, is it the ends of the teeth you're wanting to round off as in a U? I can't see how you could do it with a Dovetail cutter? What you'd need is something like a radii tool or using something like diegrinder to shape the ends.
KrynTo grow old is mandatory, growing up is optional.
-
13th Mar 2019, 11:14 PM #5Most Valued Member
- Join Date
- Jul 2016
- Location
- Melbourne
- Age
- 35
- Posts
- 1,522
Unfortunately the gears are all one piece and it's the middle one, so a shaper is probably out. Thanks for the offer Elan!
And kryn hole in one, I am happy with just two flat angled facets instead of a nice U as. It's just to make meshing easier when stationary, these gears are not changed while running.
-
13th Mar 2019, 11:34 PM #6Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,080
Can you post a pic when you get it back from cutting so I can show the guys?
-
13th Mar 2019, 11:36 PM #7Most Valued Member
- Join Date
- Jul 2016
- Location
- Melbourne
- Age
- 35
- Posts
- 1,522
Absolutely. It's going to be a little while though unfortunately, everyone seems backed up with work.
-
21st Mar 2019, 06:49 PM #8Golden Member
- Join Date
- Jul 2011
- Location
- Adelaide
- Posts
- 837
-
6th Apr 2019, 09:15 AM #9Most Valued Member
- Join Date
- Jul 2016
- Location
- Melbourne
- Age
- 35
- Posts
- 1,522
So I got this done, somewhat crudely but it gave a nice enough result. Most of this was just set up by eye as it's all non vital.
The dividing head was tilted back 15 degrees to give the tooth slope and was rotated off the X axis by the pressure angle (20 degrees) so that the 5mm ball nose end mill was traversing along the tooth flank.
Deburring was fairly annoying but the smresults are nice enough, it's off getting case hardened now.
Need to get a photo of the finished result when I gets back as none of those show it deburred.
Sent from my Nokia 8 Sirocco using Tapatalk
Similar Threads
-
WHERE CAN I BUY THIS TYPE OF GEAR TOOTH CUTTER
By beefy in forum METALWORK GENERALReplies: 12Last Post: 20th Mar 2015, 04:07 PM -
127 tooth gear
By gpigeon in forum METALWORK GENERALReplies: 18Last Post: 26th Mar 2012, 09:14 PM -
28 tooth gear for al960
By rfurzer in forum METALWORK GENERALReplies: 14Last Post: 6th Feb 2011, 01:19 PM -
Hercus 127 tooth gear
By bob colles in forum THE HERCUS AREAReplies: 3Last Post: 8th Jan 2011, 02:19 PM -
Gear tooth count on Back/Bull Gear.
By pipeclay in forum THE HERCUS AREAReplies: 31Last Post: 6th Jan 2010, 11:56 AM