Material selection for gripper jaw
Material selection for gripper jaw
(OP)
I'm currently using A2 tool steel hardended to 53 RC as fingers for gripping an iron ring which is cast into an aluminum part.(The fingers are attached to a three-jaw concentric gripper) The parts are between 700-700 deg. F. The fingers are about 1-1/2 wide, profiled for the ring, and serrated. The fingers got about 1-1/2 weeks of use before significant wear occured. Geometry doesn't lend itself well to carbide inserts. Any suggestions for longer life out of these jaws (material selection, etc)? Thanks.





RE: Material selection for gripper jaw
Otherwise some other options:
=> H13 tool steel used for high temp / high impact forging tools
=> machined ceramic fingers
TygerDawg
RE: Material selection for gripper jaw
Then look at H-11 and H-13 as mentioned above.
RE: Material selection for gripper jaw
RE: Material selection for gripper jaw
We used D2 for its wear resistant properties at 600-650°F in multiple applications.
We used D2 instead of A2 as we could get a little more toughness and the lack for dimensional change is respect to other materials such as the A2, good but not as good as D2.
unclesyd's Number
There is an order of magnitude change in the wear resistance of tool steels if the hardness is Rc58 or above. The magnitude of the increase in wear resistance, like all other wear problems, is the based on the combatants, but I've found that there is always a step change in the measurable increase in wear resistant properties at this point. This approach again has to be tempered by other physical parameters required to do the job. If your application allows it keep Tool Steels above Rc 58 to get better wear resistance.
RE: Material selection for gripper jaw
When using the Unclesyd Number in future documents (in similar fashion as Reynold's number (Re) or Peclet number (Pc)), is the abbreviation uS or Us?
RE: Material selection for gripper jaw
The definition might be one less than hard enough.