GeoGem Limited, manufacturer of high performance diamond drill bits for mining, civil engineering, geotechnical and oil industries
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Selection of diamonds
SELECTION OF DIAMONDS


Manufacturing the Graphite Mould
MANUFACTURING THE GRAPHITE MOULD


Setting the Diamonds
SETTING THE DIAMONDS


Fitting the shank to the mould
FITTING SHANK TO THE MOULD
 
MANUFACTURING PROCESSES

GeoGem's advanced factory unit is well-equipped for manufacturing diamond bits. Production facilities include Oil Country hollow spindle and CNC centre lathes, multi-axis machining centres, hot and cold presses, furnaces for temperatures up to 1400 degrees Centigrade and specialized welding, brazing and metal treatment facilities.

To make surface set crowns individual diamonds are set into the mould, but for impregnated crowns the diamonds are mixed into the powder matrix before further processing takes place.

The process used to manufacture the matrix is described briefly below.


The Infiltration Process
The powder which is to form the major component of the matrix is cold-pressed in the mould, prior to placement of the alloying element. Heat treatment in this case occurs at a temperature sufficient to melt the alloying elements, which then infiltrate through the compact to become the binder. This operation may then be followed by hot-pressing.

After heat-treatment, the bit is then stripped from the mould for machining of the thread, grinding to the correct gauge (where necessary) and final ultrasonic testing and inspection.

 

Furnace controls
FURNACE CONTROLS


Bits after furnacing
BITS AFTER FURNACING


Inspection of finished product
INSPECTION OF FINISHED PRODUCT



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GeoGem Limited, Unit 15, Colomendy Business Park, Denbigh, Denbighshire LL16 5TA, U.K.
Tel: 01745 815315   Fax: 01745 815495   Email: sales@geogem.co.uk
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