Key pins and key bushings

[Newton Hunt]

List:

Let us get something curved here (as opposed to straight).

Front key pins are oval, almost.  The two sides have a constant radii
which means that, within certain limits, the interface area between
the radii of both sides and a bushing remains constant, but relocated
fore and aft.  

This means that the contact surface will remain constant irrespective
of the angle of the pin until the termination of the side radii.

It is an old wives tale promulgated by lack of fore thought and
undelineated parameters.

Like any technical solution there are appropriate and inappropriate
application approaches.

In simpler words: You can turn key pins with no ill effect if done so
thoughtfully and carefully.  We are technicians, be an intelligent
one.

		Newton

John Ross wrote:
> 
> Hi Richard,
> I would say, never turn the front pins. Doing that will put a lesser contact
> area of pin/bushing, and cause faster wear.
> Regards,
> John M. Ross