DEEP HOLE DRILLING

Deep hole drilling - 35541 Varilock adapted connector forautomatic tool change

Rotating connector

Deep hole drilling operations are not normally performed onMachining Centres but carried out on conventional or purpose built machines which require dedicated workholding facilities.The Ejector system developed by Sandvik Coromant however,has been designed to allow deep hole drilling to be performed more effectively on Machining Centres.Ejector drilling requires high pressure coolant, a feature whichmost machining centres do not have. To enable this require- ment to be incorporated, an extra coolant unit is necessary to obtain the benefits of Ejector drillling.To deal with the copious amount of coolant supply needed to ensure good chip evacuation, Sandvik Coromant have introduced a Varilock connector with integral coolant supply housing, specially adapted for automatic tool changing.A Varilock coupling is incorporated into the rear of the connector which allows interchangeability between a wide range of basic holders.

Machine connection block

The illustration shows three types of machine connectionblocks which are necessary if the machine is not already equipped for coolant supply adjacent to the spindle. If you wish to order the machine connection block with the coolant connector, please send full details of the type of block you require and its position on the spindle nose. If your machine is already fitted with a connection block, please send the details with your order.

Pilot holes for Ejector drilling

Method of producing pilot holes:A deep pilot hole is required when not using a bush to guide the coolant. The tolerance of the hole is plus in relation to the drill diameter.

Drilling of deep pilot hole