Precision Mechanics Matching Part Two

Class of Fit for a Thread

• refers to the amount of relief built into the insert under the cutting edge.

• is determined by the clearance between the mating thread

  flanks.

• these chipformer geometries may sometimes appear like ornate pieces of art, but they are scientifically refined patterns defined for specific formation of chips.

• A cylindrical feature that gradually changes from a larger diameter to a smaller diameter at a constant ratio. Conical tapers are machined on the lathe using a taper attachment or the tailstock positioned off-center.

Clearance Angle

• refers to the amount of relief built into the insert under the cutting edge.

• Cone-shaped. Conical workpiece features gradually change from a larger diameter to a smaller diameter

• The external ridge, or high point, of a thread. Crests of screw threads fit in the internal grooves, or low points, of a tapped hole.

• is the distance between the crest and root of two

  mating threads.

Conical Taper

• A cylindrical feature that gradually changes from a larger diameter to a smaller diameter at a constant ratio. Conical tapers are machined on the lathe using a taper attachment or the tailstock positioned off-center.

• The external ridge, or high point, of a thread. Crests of screw threads fit in the internal grooves, or low points, of a tapped hole.

• operation on the lathe that uses a special narrow cutting tool to cut off the end workpiece to a desired length

• is the distance between the crest and root of two

  mating threads.

Conical

• these chipformer geometries may sometimes appear like ornate pieces of art, but they are scientifically refined patterns defined for specific formation of chips.

• The external ridge, or high point, of a thread. Crests of screw threads fit in the internal grooves, or low points, of a tapped hole.

• is the distance between the crest and root of two

  mating threads.

• Cone-shaped. Conical workpiece features gradually change from a larger diameter to a smaller diameter.

Chip Former

• Cone-shaped. Conical workpiece features gradually change from a larger diameter to a smaller diameter.

• The external ridge, or high point, of a thread. Crests of screw threads fit in the internal grooves, or low points, of a tapped hole.

• these chipformer geometries may sometimes appear like ornate pieces of art, but they are scientifically refined patterns defined for specific formation of chips.

• A naturally occurring mineral, the hardest known substance. Diamond is used as a cutting tool material for very hard workpieces.

Crests

• (sometimes referred to as a fishtail gage) is a small gage for alignment of the thread-cutting tools form.

• The external ridge, or high point, of a thread. Crests of screw threads fit in the internal grooves, or low points, of a tapped hole.

• refers to the amount of relief built into the insert under the cutting edge.

• Drilling on the lathe is very similar to drilling on a drill press except that the work rotates instead of the drill.

Crest Clearance or Root Clearance

• operation on the lathe that uses a special narrow cutting tool to cut off the end workpiece to a desired length.

• Drilling on the lathe is very similar to drilling on a drill press except that the work rotates instead of the drill.

• these chipformer geometries may sometimes appear like ornate pieces of art, but they are scientifically refined patterns defined for specific formation of chips.

• is the distance between the crest and root of two

  mating threads.

Cutoff or Parting

• Drilling on the lathe is very similar to drilling on a drill press except that the work rotates instead of the drill.

• Cone-shaped. Conical workpiece features gradually change from a larger diameter to a smaller diameter.

• operation on the lathe that uses a special narrow cutting tool to cut off the end workpiece to a desired length.

• is determined by the clearance between the mating thread

  flanks

Diamond

• A naturally occurring mineral, the hardest known substance. Diamond is used as a cutting tool material for very hard workpieces.

• is the distance between the crest and root of two

  mating threads

• Cone-shaped. Conical workpiece features gradually change from a larger diameter to a smaller diameter.

  
  

• operation on the lathe that uses a special narrow cutting tool to cut off the end workpiece to a desired length.

  
  

Drilling

• A cylindrical feature that gradually changes from a larger diameter to a smaller diameter at a constant ratio. Conical tapers are machined on the lathe using a taper attachment or the tailstock positioned off-center.

• Drilling on the lathe is very similar to drilling on a drill press except that the work rotates instead of the drill.

• these chip former geometries may sometimes appear like ornate pieces of art, but they are scientifically refined patterns defined for specific formation of chips.

• is determined by the clearance between the mating thread

  flanks.