Author Topic: Drilling Rotors (Read 77218 times)

anubiscycle · « **Reply #100 on:** November 01, 2006, 02:01:45 PM »

Yes these are turned on a LATHE. Then cross drilled.

mrbreeze · « **Reply #101 on:** November 01, 2006, 03:56:18 PM »

OK

anubiscycle · « **Reply #102 on:** November 01, 2006, 04:21:31 PM »

Quote from: mrbreeze on November 01, 2006, 03:56:18 PM

OK

mrbreeze · « **Reply #103 on:** November 01, 2006, 04:42:31 PM »

What kinda LATHE ya got?

dgfischer · « **Reply #104 on:** November 02, 2006, 02:14:53 AM »

Here's my lathe/milling machine. I have yet to turn a M/C rotor on the lathe that didnt chatter and leave the surface scarred up from the flex of the rotor. Most M/C rotors need to be trued on a grinding machine like what is used for grinding car flywheels. How do you get a non-directional finish on the rotor with a lathe?
I have ground the discs on the mill with a rotary table and a facing tool. The rotor also flexes and I would rather have it done at a local machine shop on their flywheel grinding table. These are your brakes and they need to be reliable and work right every time.
$20 to drill a rotor? Can you drill a 96 hole pattern for $20 ?

anubiscycle · « **Reply #105 on:** November 02, 2006, 06:57:06 AM »

I am not boasting, we can do just about any pattern (within reason) for our customers. I do caution people against over drilling. The truth is that for the most part any level of mild venting will out perform a stock rotor. Your pattern in your pics is not over drilled. Nice pattern BTW. I personally go on the less is more realm of this. Funny thing is I finished one last night for a cb500/cb550 that looks remarkably like that one you did. And I thought I was doing something revolutionary

. Mine, I did a 3 on 3 pattern. It was big,small,big and then small,big,small on the next sequence.

As for the chatter, this is a matter of technique and tools. A big lathe and mill like you have is drooly to say the least. But they don't exactly excel at turning rotors. Because these rotors material is so hard they must be turned on a traditional brake lathe (with cutting bits on both sides) in the same manner that one would cut composite alloy rotors or they will chatter like mad. Some of the would be "chatter" is caused by having the cutting bits in the wrong location. This can be a matter of just a few thousands off level center. Anytime I reset the machine I take my test rotor and make a pass to make sure this will not happen.

Rocking-M · « **Reply #106 on:** November 02, 2006, 01:19:10 PM »

Hey thanks for the info on how you do it Tom.
Years ago working my way through school I spent some time on a brake rotor lathe
and I'd forgotten the set up.

anubiscycle · « **Reply #107 on:** November 02, 2006, 01:48:09 PM »

Sometimes you even have to use the "rubber band" damper along with the glide pucks to make it quit.

Steve F · « **Reply #108 on:** November 02, 2006, 07:33:20 PM »

Wow, I went to get the popcorn going, come back and some of the posts mysteriously "disappeared". Hmmmmmm.

anubiscycle · « **Reply #109 on:** November 02, 2006, 07:39:23 PM »

Quote from: Steve F on November 02, 2006, 07:33:20 PM

Wow, I went to get the popcorn going, come back and some of the posts mysteriously "disappeared". Hmmmmmm.

mrbreeze · « **Reply #110 on:** November 02, 2006, 08:24:00 PM »

Man .....I gave up.... my popcorn machine blew up!!!!! Between Cheapo and our new friend RICHARD CRANIUM ....I might have to lay low for a spell. I will talk to people that I am familiar with here that just want to talk bikes and shoot the #$%* (NOT spout the #$%*!!!!)

anubiscycle · « **Reply #111 on:** November 02, 2006, 08:56:06 PM »

You see, a legit thread and we have posts like the one above poluting it....

Looks like you sprewed. I did not.

Terry in Australia · « **Reply #112 on:** November 03, 2006, 12:19:00 AM »

Damn time difference! I miss all the good arguments!

mrbreeze · « **Reply #113 on:** November 03, 2006, 02:46:12 AM »

Just as well Terry...I'm sure you would see it for what it is .....major BS!!!

Ernie · « **Reply #114 on:** November 03, 2006, 03:41:59 AM »

Quote from: mrbreeze on November 02, 2006, 08:24:00 PM

Man .....I gave up.... my popcorn machine blew up!!!!! Between Cheapo and our new friend RICHARD CRANIUM ....I might have to lay low for a spell. I will talk to people that I am familiar with here that just want to talk bikes and shoot the #$%* (NOT spout the #$%*!!!!)

ahahahaha

tsflstb · « **Reply #115 on:** November 03, 2006, 05:42:38 AM »

Just ducking in to this circle jerk for a second...

I'm sending a rotor to the ebay dude to get surfaced and drilled. I've exchanged a couple emails and he seems to know his stuff. He'll work with you on different patterns, sizes and stuff. I'll let you know how it goes.

As you were.

firecracker · « **Reply #116 on:** November 03, 2006, 10:32:01 AM »

Quote from: tsflstb on November 03, 2006, 05:42:38 AM

Just ducking in to this circle jerk for a second...

I think, make that KNOW that's the first time I've ever heard someone say they were going to duck into a circle jerk. $:-\$ Great! Now I have to spend the rest of the day with THAT image in my head!

<-- got something in my eye

anubiscycle · « **Reply #117 on:** November 03, 2006, 10:37:36 AM »

Quote from: tsflstb on November 03, 2006, 05:42:38 AM

Just ducking in to this circle jerk for a second... I'm sending a rotor to the ebay dude to get surfaced and drilled. I've exchanged a couple emails and he seems to know his stuff. He'll work with you on different patterns, sizes and stuff. I'll let you know how it goes.

As you were.

Thats good, I know nothing about what I am paid for and how I pay my bills. Good luck. Besides all I do is lie

tmht · « **Reply #118 on:** December 08, 2006, 09:42:51 PM »

It seems that www.eaglescall.com is down for the moment... does anyone have the 400 rotor drilling template that Kevin had up on that site? My friend just bought a mill and we have two 400 rotors to drill just to test it out

Dougy Dougy Dune Buggy · « **Reply #119 on:** December 09, 2006, 05:50:58 AM »

Hey..i got what you need- template, if you e-mail me i'll forward to you
DWYJ

dwyjr@yahoo.com

riktaboy · « **Reply #120 on:** December 09, 2006, 08:28:28 AM »

try his new website and see if you can find it there.

http://www.400fourstore.com/index.asp

Dougy Dougy Dune Buggy · « **Reply #121 on:** December 09, 2006, 06:40:56 PM »

Sent a reply back with an Adobe attachment for the disc
DWYJ
post pix if ya get a chance, mine were done and i never did the pix

Kevin400F · « **Reply #122 on:** December 09, 2006, 06:49:52 PM »

How many holes, and what size, in that template?

Kevin

Kevin400F · « **Reply #123 on:** December 10, 2006, 06:07:13 AM »

I played around with a magic marker, laying out various types of patterns "by eye" on a spare 400F disc, trying to get a good look relative to the six inner disc spokes, width of the swept area, hole size, etc. After trying several patterns common on modern bikes, I kept gravitating back to one with sixty holes, 1/4" diameter, in a repeating three-two-three-two layout on radial lines. What's your opinion of this type of pattern? Would it look better if the holes swept back on arcs or angled lines?

kettlesd · « **Reply #124 on:** December 10, 2006, 08:18:36 AM »

I'm partial to the pattern you have pictured myself - no nonsense, efficient and all that. If you havent found a template yet, its not a terribly big deal to do one the computer using any of the simple (and free) cad programs you can download. two concentric cirles set to the outside rotor diameter and the inside diameter gives your rotor "doughnut" Then you superimpose a star pattern of lines over the circles - and more concentric circles within the doughnut to give your precise drilling points.

Sounds way more complicated writing it than actually doing it!!

News:

Author Topic: Drilling Rotors (Read 77218 times)

anubiscycle

anubiscycle

dgfischer

anubiscycle

Rocking-M

anubiscycle

anubiscycle

anubiscycle

anubiscycle

tmht

kettlesd