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THANKYOU BOTH I UNDERSTAND THAT 2XXX ALLOYS DO NOT ANODISE AS WELL AS 7075 BUT IS IT TRUE THEN THAT 7075 FATIGUE PERFORMANCE IS REDUCED MORE THAN SAY 2014 AFTER ANODISING, OR WOULD THE REDUCTION BE THE SAME??

Can anyone help clear up some confusion I have over the suitability of 2014 T6 and 7075 T6 for anodising. I have heard that 7075 T6 can become brittle and therefore fatigue performance is reduced when anodised or hard anodised. Conversely when browsing anodisers web sites I have noticed that...

Thanks Gunsmith Can I clarify a few points are l1 and l2 radial dimensions? and when you mention shaft outline dimension do you mean Outside Diameter? For a given bolt load are you saying Fn=Fb*L2/L1? In my calculations this always gives a smaller Fn than Fb, I thought pinch bolts work the...

Gunsmith The joint is best described as follows. A component has a machined bore which fits over a shaft, for argument sake there is no difference between bore and shaft diameter and the shaft is solid. The component(which is cylindrical) has a slot machined through one wall in the axial...

thanks CoryPad, I too have seen this method using FE. Unfortunately we don't have FE capability and I am stuck with the current fastening method. I have divided the bolt tension by the Cross Secton area of the outer cylinder, this gives me a mean hoop stress If I assume this hoop stress is mid...

Does anyone know the formula or process for relating bolt tension to the nominal internal pressure when clamping a bore to a shaft using a pinch bolt. I have looked through text books and can't seem to get the relationship to work. There must be a way of relating the bolt tension to hoop...

I am setting up a test rig to measure stiffness of a motorcycle chassis and require a method of accurately sensing the load applied. Load is applied via a hydraulic cylinder, I have a pressure guage but the cylinder capacity is 45kN of which I am using typically upto 2.5 kN. I feel that the...

A question from a friend of mine. 'Should the roll center of the 1969 Pontiac GTO race car be above or below the ground ? currently 500mm below ground with factory set-up, and under 75mm bump the front camber goes from -3deg to +1deg' In my opinion. Large offset between C of G and Roll...

Be careful of using std torque tables as the final tension will depend on the friction in the threads + prevailing torque on lock nuts and the friction under the bolt/nut head (depending which one you turn). As a result you could either a. Yield the bolt b. Not have enough clamp load for the...