Bolting to two independent bolt patterns

[Armando23]

Hi,

We are currently designing a fixture to join two shaker tables. Each shaker table has the same hole pattern but 70.375" +/- .25" apart. If it was a fixture for a single shaker I know how to dimension the fixture using the fixed fastener formula. But the addition of a second shaker is throwing me off.

Can you guys help me dimension this using GD&T? Attached is the layout of the shaker tables, the hole pattern of each table and the draft copy of the new fixture.

Thanks.

 

[KENAT]

So, you could convert the +- to equivalent position and then just add this to the hole position allowance when doing the fixed formula equation.

However, this will result in somewhat large clearance holes.

Might be better to go for slot, with the patterns for the 2 different shakers perpendicular to each other.

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[tbuelna]

How are you intending to transfer loads between the two tables? Are the shaker forces transferred between the two tables solely by clamped friction from the fixture fastener preloads? If the shaker forces are transferred from one fixture to the other via shear in the fastener bodies, then the positional tolerance of the fastener patterns needs to be far more precise.