Telescoping Grooming Arms
Telescoping Grooming Arms
I typically prefer arms with telescoping ability over straight arms or dual adjustable arms. In my experience arms with telescoping ability are a bonus due to the fact that it makes the entire arm stronger. Instead of having a single piece of tubular steel and a long fulcrum to bend the arm, we now have an arm within an arm as the upper portion slides into the lower portion essentially making it doubly as thick and that much more resistant to bending. I provided two images to note a subtle but important difference, Figure A is made from rounded, mandrel bent steel to create a sweeping 90 degree angle whereas Figure B is made from square steel with an abrupt 90 degree angle. The problem and I have run into this is that the rounded, mandrel bend creates a smooth curve that will eventually begin to bind where it telescopes inside of the lower portion. Think of it not as a curve but as a wedge in the making. The other issue is that either the lip of the lower arm, the inside radius on the upper arm, or both will begin to deform as a result of impact with each other through use. It is for this reason that given the choice I would choose the abrupt 90 degree arm with square steel. Additionally with the abrupt angle I am able to wrap a bit of electrical tape or even duct tape around the upper arm where it comes into contact with the lower telescoping portion to add a bit of cushion and prevent metal deformity caused by use. With the mandrel bend there is no way to add a cushion as no matter where you wrap tape it will either not make contact with the lower portion thereby being useless or it will try to bind inside lower portion of the arm when the upper portion is lowered.
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