JCR DTH Hammers, Jcr Drillsol DTH Hammers, Jcr Bangalore DTH Hammers

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DTH Hammers

Technical Description

GENERAL CARE
Before shutting down at the end of each shift, we recommend the following

procedures :
1. Flush Hammer with air/ water for a few minutes, then turn off water
injection.
2. Flush Hammer with air/oil for a few minutes. This will coat the internal Hammer parts preventing corrosion / rust.
3. Never leave the tool in a wet/ muddy hole. Pull back from bottom as
far as necessary to prevent the Hammer sitting under water.
4. It is also good practice to pour at least half a litre of oil down the drill at start up of a new shift.
5. If the Hammer is removed from the drill rig for any reason, it is wise to pour a quantity of oil into it and block both ends, providing the flushing as outlined in steps one and two above have been carried out. If steps one and two have not been carried out the Hammer should be stripped, cleaned and oiled before being stored.

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Component Name
Piston Case/ Barrel
Piston
Control Tube
Top Sub/ Back Head
Driver Sub/ Front Chuck
Air Dristributor
Guide Sleeve/ Assembly Bush
Bit Retainer Ring/ Bit Lock
Dart/ Bonded Check Valve
Retainer Pin/ Dowell Pin
Spring
Circlip
Bit Lock O Ring
Choke
O Ring/ Assembly Bush O Ring
Front Chuck Rubber Cap
Back Head Rubber Cap

H475JCR
HB475JCR
HP475JCR
HCT475JCR
HC475JCR
HFC475JCR
HAD475JCR
HAB475JCR
HBL475JCR
HBCV475JCR
HDP475JCR
HS475JCR
HCL475JCR
HOR475JCR
HBC475JCR
HABOR475JCR
HFCRC475JCR
HCRC475JCR

H60JCR
HB60JCR
HP60JCR
HCT60JCR
HC60JCR
HFC60JCR
HAD60JCR
HAB60JCR
HBL60JCR
HBCV60JCR
HDP60JCR
HS60JCR
HCL60JCR
HOR60JCR
HBC60JCR
HABOR60JCR
HFCRC60JCR
HCRC60JCR

H65JCR
HB65JCR
HP65JCR
HCT60JCR
HC65JCR
HFC65JCR
HAD60JCR
HAB65JCR
HBL65JCR
HBCV60JCR
HDP65JCR
HS60JCR
HCL65JCR
HOR60JCR
HBC60JCR
HABOR60JCR
HFCRC60JCR
HCRC60JCR

SPECIAL FEATURES
JCR SUPER JET HAMMERS

•For use in hard rock application
• Valve less DTH Hammer design
• Reversible wear sleeve (Cylinder)
•Less number of moving parts
•Can work on low to high pressure radius
•High rate of penetration while utilising less air
•Excellent under water characteristics

SPECIFICATIONS

#	Hammer Name	Part Number	Outside Dia (mm)	Recomm Bit size (mm)	Top Sub Thread (IN)	Ham. Wt. Without Bit (kg.)	Total Len without Bit (mm)	Wrench Flat (mm)	Working Pressure (Bar)
1	JCR 4 3/4	H475JCR	103.00	120.60 to 140.00	2-7/8 Reg Pin	40.00	960.0	74.00	7.5-21
2	JCR 60	H60JCR	140.00	152.40 to 216.00	2-7/8 Reg Pin	73.50	1005.0	90.00	90.00 10.5-24
3	JCR 65	H65JCR	148.00	165.10 to 228.60	2-7/8 Reg Pin	83.50	1005.0	90.00	10.5-24

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