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"A"  is the Over All Length (O.A.L.) of a center from back end to point.
"B"  is the taper length of the center, from back end to the Gage Line Diameter "H".
"C"  is the point diameter.
"D"  is the back end diameter.
"E"  is the carbide diameter whether its an insert or a ball point.
"F"  is the height above center line on half centers.
"G"  is the cutout length on half centers.
"H"  is the gage line diameter
"J"  is the included point angle.
"J2"  is the 2nd included point angle on tracer point style centers.
"K"  is the minimum diameter on female and bull centers.
"L"  is the gage line (H) to the point length.
"M"  is the major diameter on female centers and points.
"N"  is the point length.
"P"  is the length from the gage line (H) to the back of the head also called the Gage Line Clearance.
"R"  is the flat length on bull and pipe center heads.
"S"  is the head diameter on Live centers.
"T"  is the head length on Live centers.

Please look at our Custom Specials sections for images that will help you with these descriptions above.

"Model No."  is the Ready Tool Part number and our way of distinguishing between the various catalog items that we have.  When you order from the Ready Tool Company please use this model no. and the taper you would like.

"Shank"  is the tapered section of a live or dead (solid) center that normally fits into a tailstock unit.  It can be a Morse, Jarno, Brown & Sharpe, Norton, Hendey, Straight Shank, Cincinnati, American Standard, or Landis.  These are all classified as tapers.

"Taper"  is the rear section of the center that is characterized by a specific (T.P.F) Taper Per Foot.

"Optional Taper"  is a shank (or taper) that is available for a particular center at NO additional cost above the standard list price.

"Morse"  these tapers are mostly used in lathe operation but not exclusively.  Dimensionally they are approximately .625 inch per foot taper, although this varies slightly

"Jarno"  these tapers are the easiest to calculate and are widely used in all applications.  All jarno tapers are .600 taper per foot.

"Brown & Sharpe"  these tapers, like the morse tapers, vary from size to size but have an approximate .500 inch taper per foot.   Many of these tapers are used in milling and grinding applications.

"T.P.F"  is the angle at which the "B" dimension decreases in size towards the back end of a center.

"List Price"  is the price The Ready Tool Company Charges for all its items.  Distributors and O.E.M. manufacturers receive a discount off of this price.

"Parts Breakdown"  is the itemized listing of the component parts that make up an assembly, or live center.

"Capacity"  refers to the maximum amount of load or force, whether radial or thrust, that can be applied to any given center.  Capacity is always listed as the maximum and should not be surpassed at any time.

"Thrust Load"  is the load, or force, exerted on a center length wise.  This is the pressure applied to the center from the shank to the point in a straight line direction.  Usually this is in the horizontal position and the force would be from left to right.

"Radial Load"  is the load, or force, applied on a center perpendicular to the point.  This pressure comes from the weight of the work piece, rpm's, and the force applied from whatever operation is being performed. 

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