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PERMON s.r.o.                      VKP 95-1 – OPERATION MANUAL                PAGE 5 

Safety Precautions 

The following safety precautions apply to all drilling equipment supplied by PERMON 
s.r.o. including the VKP 95-1 and the bits discussed in this manual. 

Personnel  must  become  completely  familiar  with  the  proper  procedures  and  safety 
precautions before operating and maintaining the hammers and bits. 

Failure  to  comply  with  safety  precautions  can  result  in  serious  or  fatal  injury  to 
personnel, and improper operation and maintenance can cause equipment damage 
or excessive wear on the hammer and bit. 

  Wear  proper  clothing.  A  hard  hat,  work  gloves,  safety  shoes,  eye  and  ear 

protection  are  required.  Don’t  wear  loose  clothing  that  can  get  caught  in  the 
equipment. 

  Wear goggles. Safety glasses are required. Loose chips, rock and dust are blown 

into the air during drilling. Also, wear safety glasses when resharpening bits. 

  Protect  lungs.  Wear  a  respirator  to  keep  from  breathing  or  ingesting  dust, 

especially if drilling without water or foam injection. 

  Do not drop the hammer or bit. This equipment is very heavy. Handle it with care. 

In addition, auxiliary lifting equipment is suggested. 

  Know the drilling formation. Exhaust air and hydrocarbons can form an explosive 

mixture under certain drilling conditions. If the drilling formation is known, proper 
precautions can be taken to avoid potential danger. 

  Respect  the  equipment.  Do  not  operate  the  hammer  at  excessive  pressures  or 

speeds. Follow the instructions in this manual and use the suggested procedures 
for operation and maintenance. 

  The  bit  can  drop  out  of  the  chuck  by  as  much  as  1“  (25  mm).  Caution  is 

recommended when handling the hammer in order to prevent body parts, such as 
hands and fingers, from being pinched between the chuck and bit. 

Preparation for Drilling and Drilling 

Each  hammer  is  assembled  and  tested  before  shipment.  The  hammer  is  shipped 
with all joints hand-tight. 

It  is  suggested  that  all  personnel  operating,  handling  or  maintaining  the  hammer 
become  completely  familiar  with  the  hammer  and  bits,  and  the  instructions  in  this 
manual. 

When handling the hammer and drill pipe, always keep the inside pipe and threads 
covered to prevent dirt, rust, scale or other objects from entering the hammer or the 
drill pipe. 

Always  use the proper wrenches, tools and procedures when handling the hammer 
or changing the bit. 

All thread connections must be coated with thread compound (copper, metallic zinc 
or  graphite)  before  the  hammer  is  assembled  and  operated.  Do  not  allow  thread 
compound, dirt or wire brush to fall into hammer. 

Important:  Do  not  use  bent  joints  of  pipe.  This  cause  uneven  hammer  wear  and 
premature bit failures. If the joint does not shoulder easily, check the threads. 

Summary of Contents for VKP 95-1

Page 1: ...Down the Hole Hammer VKP 95 1 O P E R A T I O N M A N U A L...

Page 2: ...ntents Preface 3 Principles of Operation 3 Specifications 3 Parts List 4 Safety Precautions 4 Preparation for Drilling and Drilling 5 Lubrication 6 Weight on Bit 7 Rotation Speed 7 Suggested Operating...

Page 3: ...ve in a wide range of rock types ranging from unconsolidated limestones to the hardest granite and quartz formations Since the hammer force is applied directly to the drill bit power transmission loss...

Page 4: ...UCK IR3 5 OPTIONAL 2 273109 O RING 55X2 3 2361120 SPLIT RING VKP 95 1 3 2361510 SPLIT RING IR3 5 OPTIONAL 4 4342580 CYLINDER 5 5009200 PISTON COMPL 6 722090 PISTON VALVE 7 5100060 BACKHEAD ASSEMBLY 8...

Page 5: ...lling conditions If the drilling formation is known proper precautions can be taken to avoid potential danger Respect the equipment Do not operate the hammer at excessive pressures or speeds Follow th...

Page 6: ...tend to blow the hole apart After a few feet of drilling increase the total weight on the bit until the hammer runs smoothly The air pressure will rise slowly then stabilise Caution Always apply the...

Page 7: ...sive formations Do not use high rotary speed Using too high of a rotary speed leads to scuffing or breakage of the carbide inserts on the drill bit Adjust the rotation to obtain the best drilling rate...

Page 8: ...ill bit carbides always sharp to keep the maximum penetration rate avoid bit breakage and reduce hammer overload Important Do not reverse rotate the drill pipe due to the danger of unscrewing either t...

Page 9: ...mer into service With the hammer assembled and immediately before returning to service pour for some rock drill oil into the hammer Fill the level of the backhead then release the check valve allowing...

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