A system configured for use as an adjustable chock (100; 400; 500) for connecting a piece of machinery (101; 401; 501) to a support along a common axis of the adjustable chock, wherein: the system comprises a first element, a center element and a center stud (106; 402); the first element has a first surface that is rotationally symmetrical and that is one of convex and concave; the first surface has a first axis of rotational symmetry substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the center element has an intermediate surface that is rotationally symmetrical and that is the other one of convex and concave; the intermediate surface has a center axis of rotational symmetry substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the first surface and the intermediate surface are complementarily shaped for engaging in operational use of the adjustable chock; the center element has a center through-hole that is cylindrical and that is coaxial with the intermediate surface; a wall of the center through-hole is provided with an inner screw thread; the center stud comprises a cylindrical outer surface; the cylindrical outer surface has a stud axis of rotational symmetry that is substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the cylindrical outer surface is provided with an outer screw thread for engaging with the inner screw thread of the center element so as to have the center stud and the center element connected through a screwed connection in operational use of the adjustable chock; the center stud comprises a stud through-hole that is cylindrical, that extends across a full length of the center stud and that is coaxial with the cylindrical outer surface; the system comprises a second element; the second element comprises a cylindrical recess with an inner screw thread for engaging with the outer screw thread of the center stud so as to have the center stud and the second element connected through a further screwed connection in operational use of the adjustable chock; characterized in that the first element is suitable for engaging one of the piece of machinery and the support and the second element is suitable for engaging the other one of the piece of machinery and the support in operational use of the adjustable chock. the system comprises a first element, a center element and a center stud (106; 402); the first element has a first surface that is rotationally symmetrical and that is one of convex and concave; the first surface has a first axis of rotational symmetry substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the center element has an intermediate surface that is rotationally symmetrical and that is the other one of convex and concave; the intermediate surface has a center axis of rotational symmetry substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the first surface and the intermediate surface are complementarily shaped for engaging in operational use of the adjustable chock; the center element has a center through-hole that is cylindrical and that is coaxial with the intermediate surface; a wall of the center through-hole is provided with an inner screw thread; the center stud comprises a cylindrical outer surface; the cylindrical outer surface has a stud axis of rotational symmetry that is substantially aligned with the common axis of the adjustable chock in operational use of the adjustable chock; the cylindrical outer surface is provided with an outer screw thread for engaging with the inner screw thread of the center element so as to have the center stud and the center element connected through a screwed connection in operational use of the adjustable chock; the center stud comprises a stud through-hole that is cylindrical, that extends across a full length of the center stud and that is coaxial with the cylindrical outer surface; the system comprises a second element; the second element comprises a cylindrical recess with an inner screw thread for engaging with the outer screw thread of the center stud so as to have the center stud and the second element connected through a further screwed connection in operational use of the adjustable chock; characterized in that the first element is suitable for engaging one of the piece of machinery and the support and the second element is suitable for engaging the other one of the piece of machinery and the support in operational use of the adjustable chock.