chipwitch 73 #1 Posted June 24, 2014 I know some of you will probably find this ridiculous... sorry. I have more time than money at the moment and am thinking about buying some cheapo brake pads to make my own PTO clutch lining. Thus the thread title. I've never tried machining the stuff, but I can't imagine organic metal pad material won't machine acceptably. I can't see a problem with it other than a slight loss in torque transfer (due to < 100% coverage area) and balance. I can probably live with a little less torque transfer since the clutch on the C-125 is over-engineered for the 12 HP engine. Balance however, is a concern. PTO shaft speed is the same as drive speed, yes? Actually, I'm suspecting my new toy has a balance issue as it is.... seems to be substantial engine vibration. Maybe due to the rubber mounts? Share this post Link to post Share on other sites
Racinbob 11,929 #2 Posted June 24, 2014 (edited) I don't see where you could get it off balance enough to be a problem or even notice it. The PTO is turning at the engine RPM. As far as the rubber mounts, I've never liked them. I feel the engine is happier being securely fastened to the frame. I had a rubber mount and replaced the rubber with solid spacers. I didn't like the way the engine shook when I shut it down. That, plus the fact that they hold a half of quart of oil less kinda soured me on an idea that didn't last long. Edited June 24, 2014 by Racinbob 1 Share this post Link to post Share on other sites
jdleach 525 #3 Posted June 25, 2014 As far as less power transfer (increased slippage), you should have none. The amount of slippage will be mostly dependant on the pressure applied to the clutch. Many of your large farm and industrial clutches are not a continuous ring of clutch material, the clutch disc isn't even a disc, but a spider looking affair with 4 or 6 arms that have the pads on the ends. You will probably have to adjust the clutch for greater pressure on the disc when engaged. As far as balance, you need to place the pads as close as possible 180 degrees apart. At 3600 RPM, you want them pretty well opposite from each other (I assume you are using 2 pads). As far as facing them to thickness, you may be surprised at how fast the material will destroy your cutting tool edge. I would not use high-speed steel, but try to use a good carbide bit or insert. Share this post Link to post Share on other sites
Fordiesel69 271 #4 Posted June 25, 2014 The plate where you will attach the clutch lining to, is in constant motion. It sounds like a very interesting idea, however I think my concern would be the issue of it flying apart when the clutch is not enguaged. Share this post Link to post Share on other sites
WH nut 553 #5 Posted June 26, 2014 How critical is balance on any mass spinning at 3600RPM Share this post Link to post Share on other sites
