A Hexapod CMM or hexapod-like CMM (10, 10') based on the principles of a hexapod, having a base structure and a movable structure connected to each other by at least three telescopically extendable legs (16, 15) - wherein the telescopically extendable legs (16, 15) are connected to the base structure and to the movable structure by spherical joints (25/26, 27/28), and - wherein each of the telescopically extendable legs (16, 15) comprises at least a first linear member and a second linear member having countersliding surfaces and are designed in such a way that a relative, linear movement of the first linear member and the second linear member is enabled, further having a drive mechanism for driving the relative linear motion of the at least two linear members (22, 23) of each leg and a controller (36, 38) that is designed to control the relative movement of the at least two linear members (22, 23) of each leg (15, 16) in a servo loop; wherein each of the telescopically extendable legs (16, 15) is a leg with an air cushioning mechanism, - the air cushioning mechanism comprises: at least one air supply system connected to at least one source of compressed air and having at least one air escape - the air escape is arranged in such a way that compressed air escaping the air escape flows into a gap between the countersliding surfaces of the at least two linear members (22, 23) of the leg cushioning the two linear members (22, 23) against each other, wherein the spherical joints (27/28, 25/26) are air ball bearings (28, 26) with balls (90, 90') seated in ball bearing shells, wherein the ball (90, 90') slides on an air flow arranged between the ball (90, 90') and the bearing shell and wherein the ball (90, 90') in the air ball bearing (26, 28) is held within the bearing shell by a magnetic force, the magnetic force is caused by an electro magnet or a strong permanent magnet, wherein the electro magnet and the permanent magnet, respectively, are designed as single magnet, a plurality of magnets or a magnetic layer covering the surface of the bearing shell. - wherein the telescopically extendable legs (16, 15) are connected to the base structure and to the movable structure by spherical joints (25/26, 27/28), and - wherein each of the telescopically extendable legs (16, 15) comprises at least a first linear member and a second linear member having countersliding surfaces and are designed in such a way that a relative, linear movement of the first linear member and the second linear member is enabled, further having a drive mechanism for driving the relative linear motion of the at least two linear members (22, 23) of each leg and a controller (36, 38) that is designed to control the relative movement of the at least two linear members (22, 23) of each leg (15, 16) in a servo loop; wherein each of the telescopically extendable legs (16, 15) is a leg with an air cushioning mechanism, - the air cushioning mechanism comprises: at least one air supply system connected to at least one source of compressed air and having at least one air escape - the air escape is arranged in such a way that compressed air escaping the air escape flows into a gap between the countersliding surfaces of the at least two linear members (22, 23) of the leg cushioning the two linear members (22, 23) against each other, wherein the spherical joints (27/28, 25/26) are air ball bearings (28, 26) with balls (90, 90') seated in ball bearing shells, wherein the ball (90, 90') slides on an air flow arranged between the ball (90, 90') and the bearing shell and wherein the ball (90, 90') in the air ball bearing (26, 28) is held within the bearing shell by a magnetic force, the magnetic force is caused by an electro magnet or a strong permanent magnet, wherein the electro magnet and the permanent magnet, respectively, are designed as single magnet, a plurality of magnets or a magnetic layer covering the surface of the bearing shell.