Cross Drilled/Slotted Clutch?

Discussion in '2-Stroke Engines' started by 074KU, May 26, 2014.

  1. 074KU

    074KU Member

    So I am sitting here on a cold and rainy night wondering, is there any benefit to cross drilling and or slotting my clutch plate? I have a "spare" from a broken clutch I replaced in a friends bike and couldn't decide if it would be worth the effort.

    I have a Mill and plenty of tools to do the job "right" so what ya think MB?

  2. butre

    butre Well-Known Member

    It would just wear your pads down faster. the reasons for crossdrilling and slotting are for improved heat dissipation (which isn't really an issue with an HT clutch) and for improved grip in wet conditions (your clutch should never be able get wet in the first place)
  3. HeadSmess

    HeadSmess Well-Known Member

    chrome it, and replace the cover with perspex/expended mesh ;)

    slots....erm...good luck :)

    otherwise, why not huh?
  4. 074KU

    074KU Member

    One of those "hmm I wonder moments" I wasn't entirely convinced of the idea, who knows maybe if I have a little extra time on my hands over the next few weeks I may just give it a shot. As you say Why not?

    Doing the slots should give me a bit of an excuse to try out this damn indexing table I picked up a while ago, see if I can't figure it out.
  5. HeadSmess

    HeadSmess Well-Known Member

    cnc makes it fairly easy... much easier to punch in some sort of code that looks like, lets see now...

    G21 (metric) G00(rapid!)
    X15 Y3
    G01(slow) F200 (mm/min)

    X10 A22.5(rotates and feeds, for a spiral)
    Z0 A0
    X15(back to start)
    X10 A22.5

    ad nauseum...

    compared to some of the old-time calculations involving...slide rules? compound fractions. extended division for calculating geartrains. something about swinging the table over at tan` when an appropriate lead cant be found so get it via pythagoras. does ya head in :)

    before even making a mess :(

    but as for slots, all i can think just mean slotted holes, not vented discs, right? dont ask what i was thinking :joker:

    piece of cake :)

    take em on centre for radial slots, take em off centre for angled slot. take one shallow cut all way round to check its all good, then go for it.

    rotate the table and wind one of the lead screws for helical slots. that might need a geartrain or the cnc option :jester:
  6. 074KU

    074KU Member

    Sadly I haven't got around to converting it to CNC yet. So many things to do, so little time.. :icon_cry:
    May have a go at doing and angled slot.
    Have given me a few ideas tho, if I do slot the clutch and it all works out I have a set of disc rotors for my little fourby I may have a stab at.
    Strangely enough they don't make them for little Suzuki
  7. HeadSmess

    HeadSmess Well-Known Member

    biggest hurdles are holding things down securely... depending on the mill, taking deep enough cuts to feel ones not wasting their time. and having to make things to make things...oh my. even making things to make things to make things :eek: then you have to store these one-use tools somewhere in case they ever serve a dual purpose perhaps.

    im assuming suzuki car...cast iron probably. shouldnt be too hard if the mill/table is big enough, other wise you might be using the table strictly to mark out... use two cutters, one to rough, one to finish. or carbide. :rolleyes:

    possible issue - retaining balance and structural integrity...there may be a reason they arent available. i cant see how a few slots should hurt though if not overly large or too close to the edge etc though... just remember to do two left hand and two right hand discs ;)
  8. 074KU

    074KU Member

    Got a couple of good machine vices and a good quality clamp kit, so holding things in place should be to much of a worry, my poor little mill has less power than the engine the clutch came off.. don't expect things to move to much.
    I am glad you mentioned Carbide tools cause I was trying to convince myself that I needed something other than HSS for a while now. :devilish:

    Oh the fun of making the tools, to make the tools to get the job done. Years ago a 6x9 and a 3x6 shed were "to big" now looking at building another just for storing tools, stock etc. Oh how I have learned a shed can never ever, under any circumstance be "to big" :ack2:

    Yah, a little Long wheel based sierra Ute. Mostly use it for off road, bit of hunting and haulage where the bigger cars are all "to nice" bought the body from a farmers yard some years ago for $200, been working on it ever since.
    I seem to have some sort of obsession with oriental crap that takes more work to get running than is really worth it, Spent all of today troubleshooting a no spark condition on the bike cuz my soldering leaves a little to be desired at times. :sweatdrop: