Wear liner with integrated torque button

1. A friction disk comprising:

a friction disk core comprising a first depression in a first surface of the friction disk core and a second depression in a second surface of the friction disk core opposite the first surface, wherein the first depression is axially aligned with the second depression, and wherein a portion of the friction disk core is located between the first depression and the second depression;

a first wear liner coupled to the first surface of the friction disk core and comprising a first protrusion extending from a first non-wear surface of the first wear liner, wherein the first protrusion is positioned within the first depression;

a second wear liner coupled to the second surface of the friction disk core and comprising a second protrusion extending from a second non-wear surface of the second wear liner, wherein the second protrusion is positioned within the second depression; and

a fastener extending from the first wear liner to the second wear liner, wherein the fastener is located through the first protrusion and the second protrusion, and wherein a first head of the fastener is recessed with respect to a first wear surface of the first wear liner and a second head of the fastener opposite the first head is recessed with respect to a second wear surface of the second wear liner.

2. The friction disk of claim 1 , wherein a sidewall of the first protrusion is formed at angle between 90° and 155° relative to the first non-wear surface.

3. The friction disk of claim 1 , wherein the friction disk core comprises a first material, and the first wear liner comprises a second material different from the first material.

4. The friction disk of claim 1 , wherein the friction disk core comprises a rotor core.

5. The friction disk of claim 1 , wherein a thickness of the first wear liner extending from the first wear surface to the first non-wear surface is between 0.05 inches and 0.15 inches.

6. The friction disk of claim 1 , wherein the friction disk core comprises a stator core.

7. A multi-disk brake system comprising:

a first friction disk comprising:

a first friction disk core comprising a plurality of first rotor disk depressions in a first surface of the first friction disk core and a plurality of second rotor disk depressions in a second surface of the first friction disk core, wherein a portion of the first friction disk core is located axially between the plurality of first rotor disk depressions and the plurality of second rotor disk depressions, and wherein a radially outward portion of the first friction disk core comprises a thickness that is greater than a thickness of a radially inward portion of the first friction disk core,

a first rotor disk wear liner coupled to the first surface of the first friction disk core and comprising a plurality of first rotor disk protrusions extending from a first non-wear surface of the first rotor disk wear liner, the plurality of first rotor disk protrusions positioned within the plurality of first rotor disk depressions,

a second rotor disk wear liner coupled to the second surface of the first friction disk core and comprising a plurality of second rotor disk protrusions extending from a second non-wear surface of the second rotor disk wear liner, the plurality of second rotor disk protrusions positioned within the plurality of second rotor disk depressions, wherein the radially outward portion of the first friction disk core is radially outward of the first rotor disk wear liner and the second rotor disk wear liner, and wherein the radially inward portion of the first friction disk core is contacting the first non-wear surface of the first rotor disk wear liner and the second non-wear surface of the second rotor disk wear liner, and

a fastener extending from the first rotor disk wear liner to the second rotor disk wear liner, wherein the fastener is located through a first protrusion of the plurality of first rotor disk protrusions and a second protrusion of the plurality of second rotor disk protrusions; and

a second friction disk comprising:

a second friction disk core comprising a plurality of second depressions in a surface of the second friction disk core, and

a second wear liner coupled to the surface of the second friction disk core and comprising a plurality of second protrusions extending from a non-wear surface of the second wear liner, the plurality of second protrusions positioned within the plurality of second depressions.

8. The multi-disk brake system of claim 7 , wherein a first head of the fastener is recessed with respect to a first wear surface of the first rotor disk wear liner, and wherein a second head of the fastener is recessed with respect to a second wear surface of the second rotor disk wear liner.

9. The multi-disk brake system of claim 7 , wherein the plurality of first rotor disk protrusions is formed in a circumferentially symmetric configuration along the first non-wear surface.

10. The multi-disk brake system of claim 7 , wherein the radially outward portion of the first friction disk core is located radially outward from an outer circumferential surface of the first rotor disk wear liner.

11. The multi-disk brake system of claim 10 , wherein a portion of the second friction disk core is located radially inward from an inner circumferential surface of the second wear liner.

12. The multi-disk brake system of claim 11 , wherein the first friction disk comprises a rotor and the second friction disk comprises a stator, and wherein the first rotor disk wear liner and the second wear liner can be interchanged between the first friction disk core and the second friction disk core.

13. The multi-disk brake system of claim 7 , wherein a usable material volume of the first rotor disk wear liner is between 50% and 70% of a total material volume of the first wear liner in an unworn state.

14. A method of making a friction disk, comprising:

forming a first depression in a first surface of a friction disk core;

forming a second depression in a second surface of the friction disk core opposite the first surface of the friction disk core, wherein a portion of the friction disk core is located axially between the first depression and the second depression;

locating a first wear liner over the first surface of the friction disk core, the first wear liner comprising a first protrusion extending from a first non-wear surface of the first wear liner and positioned within the first depression, wherein a first portion of the friction disk core contacts the first non-wear surface and a second portion of the friction disk is located at least one of radially outward or radially inward from the first wear liner, and wherein a thickness of the second portion is greater than a thickness of first portion;

locating a second wear liner over the second surface of the friction disk core, the second wear liner comprising a second protrusion extending from a second non-wear surface of the second wear liner and positioned within the second depression; and

disposing a fastener through the first protrusion and the second protrusion.

15. The method of claim 14 , wherein a first head of the fastener is recessed with respect to a first wear surface of the first wear liner, and wherein a second head of the fastener opposite the first head of the fastener is recessed with respect to a second wear surface of the second wear liner.