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Weight relieving the base cup?

Discussion in 'The Lumber Yard' started by Stuart Barron, Dec 27, 2016.

  1. Allen Ku

    Allen Ku Member

    Joined:
    Jul 12, 2017
    Location:
    Malaysia
    Guessed I'm not too late to join in the topic LMAO
    As I started trying on modding my kendamas (got some cheaps from TaoBao and got a lathe borrowed from my friend), the second thing I did after the Tamas modding was exactly the balance drilled hole.
    Well I could say the most obvious change about the mod is the lunar balance. As I kept missing the landing or the big cup just slipped away from my tama, but can land lunar consistently after the mod.
    I've mod 3 of my jammers-Lucifer from DWI, theRex from SuLab, and a modded ken to put together with my Norx mod tama. They all sesh well, and the holes don't affect the playability of other tricks, while they even provide more creativity spaces for some sick tricks(putting your pinkie in the hole for a lighthouse, etc), so in conclusion I can say that the balance hole can be definitely a thing.

    PS I didn't really do research about how the diameter or the depth affect the plays, but
    FYI I used 10mm metal drill and drilled about 3/4" depth (just about to fit my first sec of my pinkie)
     
    Nov 10, 2017
  2. Steezdiaz

    Steezdiaz Slayer

    Joined:
    Nov 1, 2016
    Location:
    Chico, CA
    Did I do this right?? LOL

    Jk I plan to clean this up soon.
     

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    Nov 24, 2017
  3. Danny Malto

    Danny Malto Member

    Joined:
    Jan 15, 2018
    Location:
    Sofia, Bulgaria
    I'm thinking of drilling a hole in my krom pop's base cup. The rubber paint is really worn down and lunar tricks are way harder than before also the ken goes backwards in like 90% of the time. Is it a good idea to do it? I'm only afraid of the ken getting cracked and I'm not sure how deep the hole should be. Anyone who has done this before?
     
    Mar 17, 2018
    quacktaped likes this.
  4. xplodit

    xplodit Slayer

    Joined:
    Sep 23, 2017
    Location:
    Colorado
    I drilled a hole in the basecup of my Maple Kaizen. It hasn’t affected durability at all, but Lunars lock in easily now. Start small and work your way to drilling out more. I went about 1/2 inch in with bit that’s no larger than the radius of the base cup.
     
    Mar 17, 2018
    quacktaped likes this.
  5. goenKendama

    goenKendama Moderator Staff Member

    Joined:
    Oct 14, 2016
    Location:
    Metro Manila, Philippines


    @Danny Malto We already had a similar thread running so yours has been merged. Have a look at previous posts for ideas.
     
    Mar 17, 2018
  6. willwturner

    willwturner n00b

    Joined:
    Feb 14, 2017
    Location:
    Los Angeles, Ca
    I just got a bamboo Big Brother from Kendama ISR, do you think that would be safe to drill a basecup hole into? It totally slays for everything except lunars, it just tips back the slightest amount, but enough to make landing flips and tosses to lunar pretty difficult. I don't want to ruin it though so I'll probably practice drilling the basecup hole on a prime first. What do y'all think? I'm worried that the wood will split because its laminated in layers.
     
    Last edited: May 22, 2018
    May 22, 2018
  7. Dre_11

    Dre_11 Honed Member

    Joined:
    Jan 30, 2019
    Location:
    West Covina, CA
    i’m thinking of drilling a hole in my kaizen but i don’t have the thing to hold the ken in place... any tips so i don’t mess up?
     
    Jun 12, 2019
  8. goenKendama

    goenKendama Moderator Staff Member

    Joined:
    Oct 14, 2016
    Location:
    Metro Manila, Philippines
    Buy a clamp so you don't drill your hand by accident. :D
     
    Jun 12, 2019
  9. Dre_11

    Dre_11 Honed Member

    Joined:
    Jan 30, 2019
    Location:
    West Covina, CA
    will this do?
     

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    Jun 13, 2019
  10. goenKendama

    goenKendama Moderator Staff Member

    Joined:
    Oct 14, 2016
    Location:
    Metro Manila, Philippines
    Probably but I'd suggest wrapping the kendama in something grippy but soft. I use these since they have rubber clamping areas. The main thing is to keep the kendama from moving around and keep your hands out of the path of the drill bit.
     

    Attached Files:

    Jun 13, 2019