
CAD/CAM (ComputerAided Designing/ ComputerAided Manufacturing) 
CAD is a general term for computer systems that are used to assist the manufacturing departments of companies in designing and drawing engineering plans. A computer system that assists the actual manufacturing process is called a CAM. 

Cam  A mechanical element that conveys kinetic motion through direct contact to a member on what is called a follower having a simple shape such as a knife edge, roller or flat surface.  
Cam Base Radius  The radius of the circle that is used as reference in determining the shape of a cam.  
Cam Blank  The stock of material prior to machining.  

The motion curve formed by the follower as it moves along the cam.  

The outer diameter of the cam.  

A cam follower with a stud that has a rolling element, such as a needle roller, embedded between the outer ring and stud.  
Torque 
The camshaft frictional torque is the peak frictional torque of the camshaft (input shaft) without any loads.  

The x and y coordinates that represent the position of any given point over two axes that cross at a right angle on the same plane. On a three dimensional plane, the z axis is also necessary as a coordinate.  
Cam Curve 
The maximum or minimum values of velocity, acceleration, jerk and so forth, that can be produced by the cam curve.  

Indicates the effect on the life of the material the formation of an oily film has. Derived by taking the ratio of the minimal dynamic viscosity required for a given operating speed to the dynamic viscosity at the operating temperature.  

The coefficient of life for bearings based on the production process of the material for the shaft bushings. Steel produced by vacuum degasification or vacuum dissolution has less nonmetal intrusions compared to steel produced by air dissolution. The former is therefore stronger against flaking and has a longer life against roll fatigue.  

The life rating calculation for antifrictional bearings is designed so that, statistically, the bearings live up to at least 90% of the calculation (90% reliability). Depending on the application, the life of the equipment may require more reliability. The coefficient of reliability is a compensation factor for life calculations to extend the amount of reliability. Note, indexing devices are calculated with a reliability of 95% (coefficient of reliability 0.62).  
Transmission 
The coefficient of a mechanism consisting of several links from input drive system to the final follower. The coefficient of torque transmission indicates how the torque will be transmitted and is calculated by multiplying the speed ratios of each link in the mechanism.  

A straight line perpendicular to the common tangent line that passes a common point where two curves meet.  

A cylindershaped cam that is drawn in at the center.  

A cam consisting of two cams sandwiched between two rollers. The cam is arranged so that one cam is pressed against one of the followers which in turn presses against the other cam.  

The length of the contact between two rolling members such as a cam and cam follower, needle and shaft or needle and outer ring. Necessary when calculating the pressure of contacted surface.  

The amount of stress that acts upon the curve formed by the contacted surfaces of two objects.  

A solid cam with an expanded center.  

The difference in the size of the cutting tool and the cam follower is compensated in the normal direction in respect to the profile.  

The time consumed for a motion to make one complete cycle.  

A solid cam that has the appearance of a cylinder. Also referred to as a barrel cam.  

The amount The cylindrical polar coordinates represented by planar polar coordinated (r, φ) of leg H of a line drawn perpendicularly downward to xy from random point P in an area of space and height z. NOTE: Where 0 is the origin, r = OH, ∠ xOH = φ , and PH = z. These are related to Cartesian coordinates (x, y, z) as x = rcos (φ), y =r sin (φ), and z = z.of stress that acts upon the curve formed by the contacted surfaces of two objects.  

A cylindrical blank with a groove cut along its perimeter in which a roller is guided through. 