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Copyright 2021. All rights reserved by Rockmore International.

 

 

 
 
 

6.  SAFETY:

 

 
The percussive hammer drilling environment poses many opportunities for injury for the careless and 
unprepared.  Be sure to work safely at all times.  Rotating equipment can entangle loose clothing.  Loud 
noises accompany the hammer operation and high-pressure air can throw dust and debris.  Protect your 
sight and hearing with appropriate safety equipment.  Keep your hands and feet clear of the borehole at 
all times.  Keep fingers from getting trapped between the hammer and the bit.

  

 
 

7.  WARRANTY: 

 
ROCKMORE guarantees all ROK LT Series Hammers and spare parts to be free of raw material and 
manufacturing defects.  Warranty coverage is valid for six months after date of shipment.   
 
In order to be eligible for warranty service, you must first file a claim and obtain a Returned Goods 
Authorization number, authorizing you to return the goods to our facility.  All goods returned to us, either 
new or used must be returned prepaid freight.  Please contact your local salesman or the appropriate 
office directly for more information.   
 
ROCKMORE reserves the right to refuse claims associated with the following problems:  
 

 

Damage caused by applying excessive force to any components of the hammer 

 

The use of non-original ROCKMORE hammer parts 

 

Any attempt to physically alter any components of the hammer, in particular but not limited to 
the application of heat or weld 

 

Failure to follow recommended operating and maintenance procedures (i.e. lubrication, 
contamination, corrosion) 

 

Failures due to abuse, misuse, careless maintenance and repairs  

 

Common wear and tear during normal drilling procedures 

 
The recommended maximum operating air pressure level for our ROK LT Series hammers is 145 PSI 
(10.0 Bar).  Do not operate the ROK LT Series Hammers above this level.

   

 
 

Liability 

 
ROCKMORE shall not be liable for any claims that occur from personal injury due to negligent procedures, 
handling, operation, and/or maintenance of ROCKMORE DTH hammers and bits.  ROCKMORE will 
decline any liability for failure to disregard recommended health and safety measures, i.e. protective eye 
wear and clothing, safety glasses, etc.  

 

Summary of Contents for ROK 20LT Series

Page 1: ...ts reserved by Rockmore International Revised 7 2 21 ROK LT ROK 20LT 30LT SERIES DTH HAMMER OPERATION SERVICE GUIDE C o n s t r u c t i o n Q u a r r y i n g E n v i r o n m e n t a l E x p l o r a t i o n G e o t h e r m a l ...

Page 2: ...Lubrication 2 3 2 Contamination 2 3 3 Corrosion 3 4 Servicing 3 4 1 Disassembly 3 4 2 Routine Inspection 3 4 3 Assembly 3 5 ROK 20LT 30LT Hammer Parts List 4 6 Safety 5 7 Warranty 5 Rockmore International Inc Rockmore International GmbH 10065 SW Commerce Circle Collini Strasse 2 Wilsonville OR 97070 A 8750 Judenburg USA Austria Phone 1 503 682 1001 Phone 43 3572 86 300 0 Fax 1 503 682 1002 Fax 43 ...

Page 3: ...n 6 0 Bar 87 PSI 2 0 m3 min 73 SCFM 6 0 Bar 87 PSI 3 75 m3 min 132 SCFM 10 0 Bar 145 PSI 3 8 m3 min 138 SCFM 10 0 Bar 145 PSI 5 5 m3 min 193 SCFM 2 3 Initiating the ROK LT Hammer We recommend using DTH bits in good condition Avoid using DTH bits that are overrun as this will alter your drilling penetration rates and can cause premature wear on various components of the hammer Inspect threads of th...

Page 4: ...n may result in premature wear on the drill bit and not better penetration rates 3 HAMMER MAINTENANCE 3 1 Lubrication Proper lubrication is necessary for effective and efficient drilling operations Inadequate amounts of lubrication may damage the hammer resulting in premature hammer failure With insufficient amounts of lubrication the temperatures of the Piston surface can exceed 1400 F 752 C Thes...

Page 5: ...ssembly The ROK LT hammers use right hand threads Use tools appropriate for removing the Driver Sub and the Top Sub from the Wear Sleeve of the ROK LT hammer There are wrench flats on both the Top Sub and the Driver Sub for assembly and disassembly Do not apply heat to the hammer Do not hit the hammer or apply excessive force with improper tools as this could initiate cracks reduce operating life ...

Page 6: ... 20LT 30LT SERIES HAMMER PARTS LIST Item Number Part Name 1 Top Sub 2 Check Valve 3 Spring 4 Valve Chest 5 Valve Centralizer 6 Main Valve 7 Valve Seat 8 Wear Sleeve 9 Cylinder 10 Piston 11 Bearing 12 Spacer 13 Bit Retainer 14 O ring Bit Retainer 15 Driver Sub A DTH Bit ...

Page 7: ...urned prepaid freight Please contact your local salesman or the appropriate office directly for more information ROCKMORE reserves the right to refuse claims associated with the following problems Damage caused by applying excessive force to any components of the hammer The use of non original ROCKMORE hammer parts Any attempt to physically alter any components of the hammer in particular but not ...

Page 8: ... com 10065 SW Commerce Circle Wilsonville OR 97070 USA AUSTRIA Phone 43 3572 86300 Fax 43 3572 84179 E mail austria rockmore intl at Collini Strasse 2 A 8750 Judenburg Austria For all your rock drilling tool needs contact ROCKMORE INTERNATIONAL www rockmore intl com ...

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