| SPECIFICATIONS |
| Hammer Name |
JCR 4 3/4 |
JCR 60 |
JCR 65 |
| Part Number |
H475JCR |
H60JCR |
H65JCR |
| Outside Dia (mm) |
103.00 |
140.00 |
148.00 |
| Recomm. Bit size (mm) |
120.60 to 140.00 |
152.40 to 216.00 |
165.10 to 228.60 |
| To Sub Thread (IN) |
2-7/8 Reg Pin |
2-7/8 Reg Pin |
2-7/8 Reg Pin |
| Ham. Wt. without Bit (Kg) |
40.00 |
73.50 |
83.50 |
| Total Len. without Bit (mm) |
960.0 |
1005.0 |
1005.0 |
| Wrench Flat (mm) |
74.00 |
90.00 |
90.00 |
| Working Pressure (Bar) |
7.5 - 21 |
10.5 - 24 |
10.5 - 24 |
| |
| Component Name |
H475JCR |
H60JCR |
H65JCR |
| Piston Case/Barrel |
HB475JCR |
HB60JCR |
HB65JCR |
| Piston |
HP475JCR |
HP60JCR |
HP65JCR |
| Control Tube |
HCT475JCR |
HCT60JCR |
HCT60JCR |
| Top Sub / Back Head |
HC475JCR |
HC60JCR |
HC65JCR |
| Driver Sub / Front Chuck |
HFC475JCR |
HFC60JCR |
HFC65JCR |
| Air Distributor |
HAD475JCR |
HAD60JCR |
HAD60JCR |
| Guide Sleeve / Assembly Bush |
HAB475JCR |
HAB60JCR |
HAB65JCR |
| Bit Retainer Ring / Bit Lock |
HBL475JCR |
HBL60JCR |
HBL65JCR |
| Dart / Bonded Check Valve |
HBCV475JCR |
HBCV60JCR |
HBCV60JCR |
| Retainer Pin / Dowell Pin |
HDP475JCR |
HDP60JCR |
HDP65JCR |
| Spring |
HS475JCR |
HS60JCR |
HS60JCR |
| Circlip |
HCL475JCR |
HCL60JCR |
HCL65JCR |
| Bit Lock O Ring |
HOR475JCR |
HOR60JCR |
HOR60JCR |
| Choke |
HBC475JCR |
HBC60JCR |
HBC60JCR |
| O Ring / Assembly Bush O Ring |
HABOR475JCR |
HABOR60JCR |
HABOR60JCR |
| Front Chuck Rubber Cap |
HFCRC475JCR |
HFCRC60JCR |
HFCRC60JCR |
| Back Head Rubber Cap |
HCRC475JCR |
HCRC60JCR |
HCRC60JCR |
SPECIAL FEATURES
• For use in hard rock application
• Valve less DTH Hammer design
• Reversible wear sleeve(cylinder)
• Less number of components
• Can work on low to high pressure radius
• High rate of penetration while utilising less air
• Excellent under water characteristics
|
GENERAL CARE
Before shutting down at the end of each shift, we recommend the following procedures:
-
Flush Hammer with air/water for a few minutes, then turn off water injection
-
Flush Hammer with air/oil for a few minutes. This will coat the internal Hammer parts preventing corrosion/rust.
-
Never leave the tool in a wet / muddy hole. Pull back from bottom as far as necessary to prevent the Hammer sitting under water.
-
It is also good practice to pour at least half a litre of oil down the drill at start up of a new shift.
-
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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