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

The turning principle remains the same whether a manual or CNC method is employed, however by the very nature of the operation turning itself falls into several distinct categories. For example external turning can be broken down into roughing, finishing, contouring, undercutting, as indeed can the internal option, but then comes a whole section on grooving with shallow and deep grooving, face grooving and parting off to be considered.

A large number of tools and inserts are available with a wide range of carbide grades, geometries and insert nose radii to cope with the task at hand, including “wiper technology” which promotes productivity improvements although certain criteria must be obeyed to obtain the correct results.

More versatility is being demanded from insert manufacturers and so the advent of dual coated technology inserts is the current vogue. Improved substrates are coupled to two surface coatings on the same insert providing a more wide ranging application area to be machined from a single insert.

Grooving falls into the turning category but within the grooving sector there is a wide range of tools to choose from, making it a section of it's own. Shallow and deep grooving, circlip grooves along with undercutting require tighter tolerances to be observed than with parting off.

Tool set up needs to be perpendicular to the workpiece and the largest tool with the widest insert width should be chosen for maximum stability, albeit in certain cases instability needs to give way to access, but at every opportunity the best set up should be utilised.

Various insert geometries are available to help with chipbreaking, with reinforced corners or front cutting edge, others with a high rake angle, different styles include single, or double edged inserts.


Products	Turning & Grooving
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	The turning principle remains the same whether a manual or CNC method is employed, however by the very nature of the operation turning itself falls into several distinct categories. For example external turning can be broken down into roughing, finishing, contouring, undercutting, as indeed can the internal option, but then comes a whole section on grooving with shallow and deep grooving, face grooving and parting off to be considered. A large number of tools and inserts are available with a wide range of carbide grades, geometries and insert nose radii to cope with the task at hand, including “wiper technology” which promotes productivity improvements although certain criteria must be obeyed to obtain the correct results. More versatility is being demanded from insert manufacturers and so the advent of dual coated technology inserts is the current vogue. Improved substrates are coupled to two surface coatings on the same insert providing a more wide ranging application area to be machined from a single insert. Grooving falls into the turning category but within the grooving sector there is a wide range of tools to choose from, making it a section of it's own. Shallow and deep grooving, circlip grooves along with undercutting require tighter tolerances to be observed than with parting off. Tool set up needs to be perpendicular to the workpiece and the largest tool with the widest insert width should be chosen for maximum stability, albeit in certain cases instability needs to give way to access, but at every opportunity the best set up should be utilised. Various insert geometries are available to help with chipbreaking, with reinforced corners or front cutting edge, others with a high rake angle, different styles include single, or double edged inserts. Print This Page