Reverse Circulation Hammers and Bits


RC Hammers
The Missile Reverse Circulation line of hammers are used in a wide range of drilling rigs in various geological formations. They are preferred by on-site geologists for their high percentage of uncontaminated sampling; their fast penetration rates; and their trouble-free, low-cost, and long life performance. The pride of workmanship and outstanding engineering make these hammers a superior value. Excellent dependability, service, and support.
RC Hammer Features
RC 400
4 5/8" | 4 3/4" | 4 7/8" | 5" | 5 1/8" | 5 1/4"

RC400 Component Parts | ||
No. | Description | Part No. |
1 | Back Head | 415020 |
2 | NRV Seal | R400019 |
3 | NRV | R400018 |
4 | NRV Spring | R400017 |
5 | Make Up Steel | 415016 |
6 | Make Up Rubber | 415015 |
7 | NRV Housing | 415014 |
8 | Sample Tube Top | R400012 |
9 | O-ring | - |
10 | Sample Tube Bottom | R400013 |
11 | Air Distributor Inner O-ring | - |
12 | Air Distributor | 415011 |
13 | Air Distributor Outer O-ring (2) | - |
14 | Piston | 415009 |
15 | Inner Sleeve Cylinder | 415008 |
16 | Bit Bearing Bushing | 415007 |
17 | Wear Sleeve | 415006 |
18 | Bit Retaining Ring O-ring | - |
19 | Bit Retaining Ring | 415004 |
20 | 4 5/8" Locking Shroud | 458400SHROUD |
20 | 4 3/4" Locking Shroud | 434400SHROUD |
20 | 4 7/8" Locking Shroud | 478400SHROUD |
20 | 5" Locking Shroud | 5400SHROUD |
20 | 5 1/8" Locking Shroud | 518400SHROUD |
20 | 5 1/4" Locking Shroud | 514400SHROUD |
20 | Shroud Locking Key (2) | R400003 |
21 | Chuck w/Lock | 415001 |
- | O-Ring Kit | 415005 |
HAMMER SPECIFICATIONS | |
Length (w/o drill bit) | 46.647" |
Outside Diameter | 4.449" |
Weight (w/o bit) | 134.1 lbs. |
Cylinder Bore | 3.518" |
Piston O.D. | 3.514" |
Piston Stroke | 3.346" |
Piston Weight | 22.52 lbs. |
Hole Sizes | 4 5/8" - 5 1/8" |
Air Pressure Consumption | 150 psi - 350 psi |
Wrench Size | A/F 3.496" |
Connection | Std. 3 1/2" Remet |
AIR CONSUMPTION CHART | |||||||
PSI | 100 | 150 | 200 | 250 | 300 | 350 | 400 |
CFM | - | 225 | 330 | 400 | 510; | 625 | - |

Download RC400 Brochure
RC 475
5 1/8" | 5 1/4" | 5 3/8" | 5 1/2" | 5 3/4" | 6"

RC475 Component Parts | ||
No. | Description | Part No. |
1 | Back Head | 475020 |
2 | NRV Seal | R400019 |
3 | NRV | R400018 |
4 | NRV Spring | R400017 |
5 | Make Up Steel | 475016 |
6 | Make Up Rubber | 475015 |
7 | NRV Housing | 475014 |
8 | Sample Tube Top | R400012 |
9 | O-ring | - |
10 | Sample Tube Bottom | R400013 |
11 | Air Distributor Inner O-ring | - |
12 | Air Distributor | 475011 |
13 | Air Distributor Outer O-ring (2) | - |
14 | Piston | 475009 |
15 | Inner Sleeve Cylinder | 475008 |
16 | Bit Bearing Bushing | 475007 |
17 | Wear Sleeve | 475006 |
18 | Bit Retaining Ring O-ring | - |
19 | Bit Retaining Ring | 475004 |
20 | 5 1/2" Locking Shroud | 512475SHROUD |
20 | 5 1/4" Locking Shroud | 514475SHROUD |
20 | 5 1/8" Locking Shroud | 518475SHROUD |
20 | 5 3/8" Locking Shroud | 538475SHROUD |
20 | 5 3/4" Locking Shroud | 534475SHROUD |
20 | 6" Locking Shroud | 6475SHROUD |
20 | Shroud Locking Key (2) | R400003 |
21 | Chuck w/Lock | 475001 |
- | O-Ring Kit | 475005 |
HAMMER SPECIFICATIONS | |
Length (w/o drill bit) | 45.622" |
Outside Diameter | 4.748" |
Weight (w/o bit) | 143.44 lbs. |
Cylinder Bore | 3.775" |
Piston O.D. | 3.769" |
Piston Stroke | 3.346" |
Piston Weight | 27.2 lbs. |
Hole Sizes | 5 1/8" - 5 3/4" |
Air Pressure Consumption | 150 psi - 350 psi |
Wrench Size | A/F 3.496" |
Connection | Std. 4 1/2" Remet |
AIR CONSUMPTION CHART | |||||||
PSI | 100 | 150 | 200 | 250 | 300 | 350 | 400 |
CFM | - | 325 | 430 | 500 | 610; | 725 | - |

Download RC475 Brochure
Missile LX RC Hammer Breakdown
RC Bits
We carry a large inventory of RC bits for convenient and quick delivery. Standard bits come with higher grade carbides for longer, harder drilling performance. Diamond buttons are available by special order on all bits. Economize the diamond button cost even more by reclaiming the used diamonds (if in good shape) and have them reinserted in to a new bit body. Please contact us for additional details.

