Jemma Tools Group ( UK Distributor - Fraisa - Dormer - Sandvik Coromant - Rhenus - Kyocera - Horn UK - Houghton - Kennametal - Mitsubishi - 3M - Allied Maxcut - Saint Gobain

When selecting a drill certain factors have to be considered before the choice is made. The diameter of drill, depth of hole, the number of holes to produce, and the material to be drilled are the basic criteria, with more specific detail being hole tolerance, accuracy, surface finish and whether the hole is through or blind.

In addition the application must be considered as to how the hole is to be produced. Will the hole be drilled in the horizontal or vertical axis, as this will affect swarf control, and how the workface is going to be held.

Geometry and helix play a major part in achieving the desired result, along with the point angle for a specific material, and care is needed to select the correct geometry. Slower helix or straight flute drills perform better in short chipping materials, whereas quicker helix drills are better suited to long chipping ductile material.

When drilling deep holes, straightness is the fundamental requirement therefore a specific flute form is available for holes greater than five times diameter deep.

Illiminating drill wander when deep hole drilling can be enhanced by utilising stub drills to effectively pilot the hole. In some cases it is necessary to peck drill, (retract the drill away from the workface) or even series drill (start off with a stub drill and increase length to achieve depth).

With advances in technology comes the need for quicker processing times and greater reliability. Enhanced performance by through tool cooling is a major factor is process reliability along with optimised tool coatings for elevated speeds.

For mass production of single diameter, shallower or larger diameter holes indexable insert drills offer the most competitive solution. The fixed body toolholder has interchangeable inserts attached at the cutting point and these generally have more than one cutting edge, with various carbide grades and geometries designed to handle a variety of cutting conditions and materials.


Products	Drilling
Abrasives (bonded) Abrasives (coated) Adhesives Back Ends Back spot facing tools Burrs Calibration Carbide tools (indexable) Carbide tools (solid) Chucks Clamping elements Cleaning products Coolants Collets Countersinks Cutting Tools Cutting Oils Dividing heads Dovetail cutters Drills Drill bits Engraflexx Engraving tools (micropercussion) Engraving tools (HSS/Carbide solid) Files Fixture plates Gauges Gravostar Grinding wheels Ground Flat Stock Hacksaw blades Hand Tools Hand cleaners Hole saws Hygiene products Indexing heads Indexable inserts Indexable tooling Inverted dovetail cutters Janitorial products Lubricants Measuring equipment Milling tools (indexable) Milling tools (solid) Oils Optical devices Paper products Power tools Power saw blades Precision equipment Precision tools Protective clothing Quintus setting devices Reamers (HSS/Carbide/ Indexable) Regrinds Saws Saw blades Screws Silver steel Sockets Socket sets Speed increasers Spindle tooling Taps & Dies Threading tools (indexable) Threading tools (solid) Toolholders Turning tools Universal adaptors Vices Vice jaws Vice towers Workholding	When selecting a drill certain factors have to be considered before the choice is made. The diameter of drill, depth of hole, the number of holes to produce, and the material to be drilled are the basic criteria, with more specific detail being hole tolerance, accuracy, surface finish and whether the hole is through or blind. In addition the application must be considered as to how the hole is to be produced. Will the hole be drilled in the horizontal or vertical axis, as this will affect swarf control, and how the workface is going to be held. Geometry and helix play a major part in achieving the desired result, along with the point angle for a specific material, and care is needed to select the correct geometry. Slower helix or straight flute drills perform better in short chipping materials, whereas quicker helix drills are better suited to long chipping ductile material. When drilling deep holes, straightness is the fundamental requirement therefore a specific flute form is available for holes greater than five times diameter deep. Illiminating drill wander when deep hole drilling can be enhanced by utilising stub drills to effectively pilot the hole. In some cases it is necessary to peck drill, (retract the drill away from the workface) or even series drill (start off with a stub drill and increase length to achieve depth). With advances in technology comes the need for quicker processing times and greater reliability. Enhanced performance by through tool cooling is a major factor is process reliability along with optimised tool coatings for elevated speeds. For mass production of single diameter, shallower or larger diameter holes indexable insert drills offer the most competitive solution. The fixed body toolholder has interchangeable inserts attached at the cutting point and these generally have more than one cutting edge, with various carbide grades and geometries designed to handle a variety of cutting conditions and materials. For further information download the PDFs below:- Fraisa Drilling Technology 2008 Catalogue - Click Here Print This Page