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  1. Replies
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    The only reasons I can imagine why the nylon...

    The only reasons I can imagine why the nylon bushing would case "tightness" are the 2% moisture retainment and swelling it can cause or disalignment.

    In the worst case, send it back, and I'll...
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    That ram was made back in 2004.... I can imagine...

    That ram was made back in 2004.... I can imagine the oring on the piston not being all that happy with 13 years of idleness.

    Does the rod/piston move smoothly?
  3. Thread: Keyed shaft

    by maddox10
    Replies
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    279

    Or me.

    Or me.
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    Last time I epoxy'd magnets I did make up a batch...

    Last time I epoxy'd magnets I did make up a batch of epoxy, dabbed it in between the magnets and had the motor spin around in the lathe untiel the glue was hardened.
  5. Thread: Iskra motors

    by maddox10
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    208

    In any case, the Iskra's are European made...

    In any case, the Iskra's are European made (Slovakia) and that is reflected in build quality and pricetag.
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    Have a look at Ewans webshop, and ask his advice....

    Have a look at Ewans webshop, and ask his advice.

    https://gimsonrobotics.co.uk/
  7. Thread: Iskra motors

    by maddox10
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    6
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    208

    In Bullfrog the Iskra 24V 1.2Kw motors @10S were...

    In Bullfrog the Iskra 24V 1.2Kw motors @10S were bulletproof combined with the Robot Power Sidewinder.
    Never had any problems with those.

    One disadvantage tough, they are heavy compared to...
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    It depends on your knowledge and/or acces to...

    It depends on your knowledge and/or acces to machining time.

    But for a beginner, an electric lifter is easy enough.

    If you're aquinted to industrial pneumatics, a low pressure lifter or even...
  9. Thread: Iskra motors

    by maddox10
    Replies
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    208

    Any decent hydraulics suppier can help you there....

    Any decent hydraulics suppier can help you there. Iskra's are most used on hydraulic pump groups for lorry-tail gates and such.
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    Yes, it will. Scooter motors are a tad bigger...

    Yes, it will. Scooter motors are a tad bigger than battery drill motors.

    The MY1016 works perfectly with the Tz85A in high stall apprications.
    The Sidewinder survives Bosch 750, Iskra 1.2Kw...
  11. The LiFePo4's are not under the Fuse Rule...

    The LiFePo4's are not under the Fuse Rule because the battery Chemistry is inherently safer than LiPo.

    Worst that those can do is puff up and emit a lot of smoke.
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    We tested a Revolt RV-100pro...

    We tested a Revolt RV-100pro unsensored on 3S driving a 20kg disk on bronze bushings today. It needed a small push to get start, but it made the revs calculated.

    I'm really curious how it will...
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    4mm only? Those tooth will be stripped during...

    4mm only? Those tooth will be stripped during the first decent acceleration.

    Just to give an example of forces on gears. Kashei, a feather stripped and split steel mod 2 gears , and the motor...
  14. Replies
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    957

    I hear the batteries screaming because you'll...

    I hear the batteries screaming because you'll need to cram'm in with a crowbar.
  15. I guess we have a little confusion about cells in...

    I guess we have a little confusion about cells in series and cells in parallel.

    Good LiPo and LiFePo4 packs have balancing leads, especialy to charge each cell.
    That is also the reason for the...
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    The HPDE over a very resilient open frame isn't a...

    The HPDE over a very resilient open frame isn't a bad idea , and there are some fine examples of that.
    Unfortunatly, never seen one done in any degree of succes in heavyweight.

    But don't worry...
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    Team RCC tried HDPE (semi)monocoque 30mm thick on...

    Team RCC tried HDPE (semi)monocoque 30mm thick on Obsidian. It lasted 1 event.
    The HDPE welds are more brittle than the sheets, and bends tend to concentrate stress.

    For bulkheads, HDPE is good...
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    The XT range of connectors don't suffer from the...

    The XT range of connectors don't suffer from the solder overflow.
  19. http://ranglebox.com/product/botbitz-30a-brushed-e...

    http://ranglebox.com/product/botbitz-30a-brushed-esc/
  20. Thread: Magnexxica

    by maddox10
    Replies
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    1,053

    Very very ambitious. My experiences with...

    Very very ambitious.

    My experiences with multiple motors for 1 purpose ain't to favorable.

    Also, with that kind of armor you'll have to build very very tiny.
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    A123 =LiFePo4 chemistry. The "originals" are...

    A123 =LiFePo4 chemistry.

    The "originals" are 3.3V 2300mAh 40C per cell.

    Finding those is like finding Speed 900's. Rare, and in most cases knackered.

    Modern variants like the Zippy...
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    My certification capability evaporated with the...

    My certification capability evaporated with the change of job earlier this year.
  23. Replies
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    771

    That ram was build to cope with 105 bar/4500psi...

    That ram was build to cope with 105 bar/4500psi hydraulic, static pressure.
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    771

    Is it the steel 100*140 you got a few years back?

    Is it the steel 100*140 you got a few years back?
  25. It seems I want to try one.

    It seems I want to try one.
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