Button Bit Sharpening 

Hard rock drill bits have Tungsten carbide “buttons” that become dull and flat during the drilling process. These buttons can be refurbished to extend the service life of the drill bit.    

An 89mm diameter drill bit can have approx. 1.5mm of steel removed in 15 minutes. The tank accommodates six drill bits of this size per cycle. Each cycle is controlled by an in-built timer, which allows other work to be completed during the erosion process.

To enable the correct grinding of the button, the surrounding steel body must first be removed. The traditional method is to grind the steel using an Angle Grinder. This method is labour intensive, creating health hazards ranging from muscle strains to respiratory problems not to mention the environmental issues from the grinding dust and noise.

To restore the Tungsten Carbide button back to “as new” condition, a Swedish made bit sharpening machine is used. This semi-auto machine utilises diamond impregnated grinding pins that have a concave shape that matches the style and size of the button. A recirculating coolant system suppresses any dust whilst cooling the carbide and grinding pin.

The alternative technique for this is a system that utilises reverse electrolysis in a salt water solution to erode the steel, without affecting the Tungsten carbide. Drill bits are suspended above a copper cathode plate with enough salt solution to cover the area to be eroded. Low voltage current is then transmitted between the cathode and the bit body, thus eroding the steel.

The whole process can be repeated 5-6 times for each drill bit, which equates to significant cost savings for our customers.

Product Description

Our factory specializing in producing diamond Button Bits grinding cups / grinding pin. It's a perfect tool for grinding your broken or worn button bits, to prolong it's lifespan.

Standard AIR / WATER ways on grinding pin 

1. Single-water way is suitable for all insert shapes and all types of grinding machines.

2. The 3-water ways are standard on all grinding pin larger than 14mm. Gives a better redressing result, longer life of the grinding pin. 

Models & Details

We have different models:

8mm shank model,

9mm shank model,

internal hex drive model,

Our grinding pin can be used for grinding 7mm-25mm button size. Other sizes available on request.

They can be used for grinding both the bit button and body steel in one operation.

The combination grinding pin benefits from a specially developed grinding material capable of grinding both carbide and steel at a regular and consistent rate.  

Available with a choice of Hemispherical, Ballistic Semi Ballistic, parabolic /Paraboloid or Conical cups.

To reach a better grinding effect, ROSCHEN also supply the relative useful tools: hand-held grinder, semi-automatic grinding machine, recycling water cooling system. Any interest, please feel free to ask me.  

FAQ 

How to order? 

Please send us your inquiry with detail item description or with Model number.  

If there is no packing demand we take it as our regular exported standard packing.   

We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.

You send us your detail requirement, we provide quotation to you.   

Can I expect a quality products?  

All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV. 

The information you may like to know before Payment:   

1. Methods of Payment:   

T/T (Telegraphic Transfer) or L/C at sight   

2. Shipping way   

Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air   

Bulk order: we suggest by air or by sea.   

3. Quality Control   

We have our own experienced QC.    

There will be strict inspection and testing for every order before shipping out.