Excavator wear assembly

1. An excavator wear assembly comprising:

an adaptor having a spigot portion, the spigot portion having a transverse dimension;

a wear member releasably mountable on the adaptor, the wear member having a body with a socket cavity, the socket cavity adapted to receive the spigot portion of the adaptor, the wear member further including a pair of mounting ears extending from the body, each of the mounting ears having a transverse dimension, each of the mounting ears also having a top face and a bottom face that are arranged such that both the top and the bottom faces are aligned to converge;

wherein, the transverse dimension of each mounting ear is in the range 0.25 to 0.4 of the transverse dimension of the spigot portion, and

the spigot portion has an upper and a lower rear bearing surface, and an upper and a lower forward bearing surface, the upper rear bearing surface and the upper forward bearing surface being the rearward and forward portions, respectively, of a single smoothly curved upper surface of the spigot portion, the lower rear bearing surface and the lower forward bearing surface being the rearward and forward portions, respectively, of a single smoothly curved lower surface of the spigot portion, and at the rear of the spigot portion the upper and lower rear bearing surfaces converge in a forward direction.

2. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.26 to 0.39 of the transverse dimension of the spigot portion.

3. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.27 to 0.38 of the transverse dimension of the spigot portion.

4. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.28 to 0.37 of the transverse dimension of the spigot portion.

5. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.29 to 0.36 of the transverse dimension of the spigot portion.

6. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.3 to 0.35 of the transverse dimension of the spigot portion.

7. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is in the range 0.31 to 0.34 of the transverse dimension of the spigot portion.

8. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is 0.32 of the transverse dimension of the spigot portion.

9. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is 0.33 of the transverse dimension of the spigot portion.

10. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is one third of the transverse dimension of the spigot portion.

11. The excavator wear assembly of claim 1 , wherein the transverse dimension of each mounting ear is a distance from an outer face of the respective mounting ear to an inner face thereof.

12. The excavator wear assembly of claim 11 , wherein the inner face of each mounting ear is adapted to oppose and engage a respective sidewall of the spigot portion of the adaptor.

13. The excavator wear assembly of claim 1 , wherein the transverse dimension of the spigot portion is a distance between opposed sidewalls thereof.

14. The excavator wear assembly of claim 1 , wherein the wear member is a digging tooth.

15. The excavator wear assembly of claim 1 , wherein the spigot portion of the adaptor is symmetrical about a horizontal plane of the adaptor.

16. The excavator wear assembly of claim 1 , wherein the adaptor further comprises a pair of side wall mounting recesses located in a forward portion of respective opposed side walls of the adaptor, the side wall mounting recess being symmetrical about a horizontal plane of the adaptor.

17. The excavator wear assembly of claim 1 , wherein the mounting ears of the wear member are symmetrical about a horizontal plane of the wear member.

18. The excavator wear assembly of claim 1 , wherein the upper and lower surfaces of the spigot portion extend substantially from one side of the spigot portion to the other side of the spigot portion.

19. A wear member for an excavator wear assembly, the wear member comprising:

a body with a socket cavity, the socket cavity having a transverse dimension;

a pair of mounting ears extending from the body, each of the mounting ears having a transverse dimension, each of the mounting ears also having a top face and a bottom face that are arranged such that both the top and the bottom faces are aligned to coverage; and

wherein, the transverse dimension of each mounting ear is in the range 0.25 to 0.4 of the transverse dimension of the socket cavity, and

the socket cavity has an upper and a lower rear bearing surface, and an upper and a lower forward bearing surface, the upper rear bearing surface and the upper forward bearing surface being the rearward and forward portions, respectively, of a single smoothly curved upper surface of the socket cavity, the lower rear bearing surface and the lower forward bearing surface being the rearward and forward portions, respectively, of a single smoothly curved lower surface of the socket cavity, and at the rear of the socket cavity the upper and lower rear bearing surfaces converge in a forward direction.

20. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.26 to 0.39 of the transverse dimension of the socket cavity.

21. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.27 to 0.38 of the transverse dimension of the socket cavity.

22. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.28 to 0.37 of the transverse dimension of the socket cavity.

23. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.29 to 0.36 of the transverse dimension of the socket cavity.

24. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.3 to 0.35 of the transverse dimension of the socket cavity.

25. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is in the range 0.31 to 0.34 of the transverse dimension of the socket cavity.

26. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is 0.32 of the transverse dimension of the socket cavity.

27. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is 0.33 of the transverse dimension of the socket cavity.

28. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is one third of the transverse dimension of the socket cavity.

29. The wear member of claim 19 , wherein the transverse dimension of the socket cavity is a distance between an inner face of the first mounting ear of the pair of mounting ears and an inner face of the second mounting ear of the pair of mounting ears.

30. The wear member of claim 19 , wherein the transverse dimension of each mounting ear is a distance from an outer face of the respective mounting ear to an inner face thereof.

31. The wear member of claim 19 , wherein the mounting ears of the wear member are symmetrical about a horizontal plane of the wear member.

32. The excavator wear assembly of claim 19 , wherein the upper and lower surfaces of the socket cavity extend substantially from one side of the socket cavity to the other side of the socket cavity.