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Thread: Shear strength comparison cast steel/EN40T

  1. #1
    Associate Engineer
    Join Date
    Aug 2020
    Posts
    2

    Shear strength comparison cast steel/EN40T

    Hi
    Im new to the forum and engineering so if someone could help me with a challenge in this area I'd be very grateful. I'm trying to understand the shearing forces on a cast steel locating lug on a leading link suspension arm which locks a hub brake back plate on a late 1960's Suzuki scooter in position.

    The reason being that in order to make the machine safer I want to fit a bigger brake.

    Like the old brake back plate the new brake back plate has a slot in it for the lug (on the cast armature) but in a different position. The new slot position aligns with a bolt hole elsewhere on the casting. So I was thinking I could have a new bolt and nut made up to fit the slot. The bolt will likely have a fractionally smaller cross-sectional area than the cast lug so I was wondering if I could design out the difference through a higher grade materials specification. Perhaps if I turned it out of EN40T.

    So can anyone help me understand how to compare the two materials cast steel/EN40T please?
    just want to know if this thing will be safe if I go ahead with the plan.
    many thanks in advance.

  2. #2
    Principle Engineer Cragyon's Avatar
    Join Date
    Feb 2013
    Location
    Newark, NJ
    Posts
    248
    Insufficient information to assist.

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